Reported Speech and Tense Backshift

Reported speech (also called indirect speech) is one of the most important areas where tenses shift within a sentence. When you report what someone said, the tenses in the original statement typically move one step back in time. This process is called backshift.

Direct vs. Indirect Speech

Direct speech quotes the speaker's exact words:

Maria said, "I am working on the project."

Indirect (reported) speech paraphrases what was said, without quotation marks:

Maria said that she was working on the project.

Notice how "am" becomes "was." The tense shifts backward because we are reporting from a later point in time — the moment of speaking is now in the past.

The Backshift Table

When the reporting verb is in the past tense (said, told, mentioned, explained, etc.), the tenses in the reported clause shift as follows:

Direct Speech (Original)	Reported Speech (Backshifted)	Example
Present simple: "I work here."	Past simple: He said he worked there.	work → worked
Present continuous: "I am reading."	Past continuous: She said she was reading.	am reading → was reading
Present perfect: "I have finished."	Past perfect: He said he had finished.	have finished → had finished
Present perfect continuous: "I have been waiting."	Past perfect continuous: She said she had been waiting.	have been waiting → had been waiting
Past simple: "I saw it."	Past perfect: He said he had seen it.	saw → had seen
Past continuous: "I was sleeping."	Past perfect continuous: She said she had been sleeping.	was sleeping → had been sleeping
Will: "I will help."	Would: He said he would help.	will → would
Can: "I can swim."	Could: She said she could swim.	can → could
May: "I may leave."	Might: He said he might leave.	may → might
Must: "I must go."	Had to: She said she had to go.	must → had to
Shall: "I shall return."	Would: He said he would return.	shall → would

Important: Past perfect and past perfect continuous do not shift further. They remain unchanged:

"I had already left." → She said she had already left.

Similarly, could, would, should, might, and ought to do not change:

"I could help." → He said he could help.

Backshift of Pronouns, Time, and Place

Backshift affects more than just verb tenses. Pronouns, time expressions, and place references also change to reflect the reporter's perspective.

Pronouns

Direct	Reported
I / me / my	he, she / him, her / his, her
we / us / our	they / them / their
you (context-dependent)	I, he, she, they (depends on who was addressed)

Time and Place Expressions

Direct Speech	Reported Speech
today	that day
yesterday	the day before / the previous day
tomorrow	the next day / the following day
now	then / at that time
this week	that week
last year	the year before / the previous year
next month	the following month
here	there
ago	before / earlier

Full example:

Direct: "I will finish the report here today," James said. Reported: James said that he would finish the report there that day.

Exceptions to Backshift

Not every reported statement requires backshift. There are several well-established exceptions.

Exception 1: Universal Truths and Scientific Facts

When the reported statement describes something that is always true, backshift is optional. Many writers and style guides prefer keeping the present tense.

The professor explained that water boils at 100 degrees Celsius. She told us that the Earth revolves around the Sun.

Both present tense ("boils," "revolves") and past tense ("boiled," "revolved") are grammatically acceptable, but present tense is more natural because the facts remain true.

Exception 2: Very Recent Speech

If you are reporting something that was said moments ago and the situation has not changed, backshift is optional.

He just said he is coming. (acceptable — he said it seconds ago) He just said he was coming. (also acceptable — standard backshift)

Exception 3: Still-True Statements

When the reported information is still true at the time of reporting, some writers choose not to backshift.

She said she lives in Tokyo. (she still does) She said she lived in Tokyo. (ambiguous — may imply she no longer lives there)

Using present tense in this case can add clarity, but both forms are correct.

Exception 4: Reporting Verbs in Present Tense

When the reporting verb is in the present tense, no backshift occurs.

He says he is happy. She tells me she will arrive soon.

This is common in journalism, academic writing, and informal conversation.

Reporting Questions

Reported questions follow backshift rules and also change word order from question form to statement form.

Yes/No Questions

Use if or whether to introduce reported yes/no questions.

Direct: "Do you like coffee?" Reported: She asked if I liked coffee.

Direct: "Have you been to Japan?" Reported: He asked whether I had been to Japan.

Wh- Questions

Keep the question word, but change to statement word order (subject before verb).

Direct: "Where do you live?" Reported: She asked where I lived. (NOT: where did I live)

Direct: "What are you doing?" Reported: He asked what I was doing. (NOT: what was I doing)

Reporting Commands, Requests, and Advice

Commands and requests use to + infinitive (no backshift of the verb itself).

Direct: "Close the door." Reported: She told me to close the door.

Direct: "Don't touch that." Reported: He told us not to touch that.

Direct: "Please sit down." Reported: She asked me to sit down.

For advice, use advised + to infinitive:

Direct: "You should see a doctor." Reported: He advised me to see a doctor.

Reporting Verbs and Their Patterns

Different reporting verbs take different grammatical structures.

Verb	Pattern	Example
say	said (that) + clause	He said that he was tired.
tell	told + person + (that) + clause	She told me that she was leaving.
ask	asked + if/whether/wh- + clause	He asked if I had finished.
explain	explained (that) + clause	She explained that the system was down.
suggest	suggested + -ing / that + clause	He suggested meeting later. / He suggested that we meet later.
promise	promised + to infinitive / that + clause	She promised to help. / She promised that she would help.
warn	warned + person + (not) to infinitive	He warned us not to go there.
deny	denied + -ing	She denied taking the money.
admit	admitted + -ing / that + clause	He admitted making a mistake.
refuse	refused + to infinitive	She refused to answer.

Common Errors in Reported Speech

Error 1: Keeping Question Word Order

Incorrect	Correct
She asked where did I work.	She asked where I worked.
He wanted to know what was I doing.	He wanted to know what I was doing.

Error 2: Forgetting to Backshift

Incorrect	Correct
He said he is busy. (if reporting past speech, not recently)	He said he was busy.
She told me she will come.	She told me she would come.

Error 3: Confusing "Say" and "Tell"

• Say does NOT take a person object directly: He said that... (NOT: He said me that...)
• Tell REQUIRES a person object: He told me that... (NOT: He told that...)

Error 4: Double Backshift

Do not shift past perfect further — it is already the "deepest" past form.

Incorrect	Correct
She said she had had finished the work.	She said she had finished the work.

Conditional Tense Combinations

Conditional sentences express hypothetical situations and their consequences. While the four basic conditional types (zero, first, second, third) each follow a standard tense pattern, advanced English frequently uses mixed conditionals — combinations that cross the boundaries of these types. Understanding these combinations is essential for expressing complex relationships between time, reality, and possibility.

Quick Review of Standard Conditionals

Before exploring mixed forms, here is a summary of the four standard types.

Type	If Clause	Main Clause	Use	Example
Zero	Present simple	Present simple	General truths, habits	If you heat water, it boils.
First	Present simple	Will + base verb	Real/likely future	If it rains, I will stay home.
Second	Past simple	Would + base verb	Unreal present/future	If I had money, I would travel.
Third	Past perfect	Would have + past participle	Unreal past	If she had studied, she would have passed.

Mixed Conditional Type 1: Past Condition, Present Result

This combination uses a third conditional if-clause with a second conditional main clause. It describes a past event that did not happen, and imagines its effect on the present.

Structure: If + past perfect, would + base verb

Examples

If I had accepted that job offer, I would be living in London now. (I didn't accept the offer in the past → I'm not in London now.)

If she had studied medicine, she would be a doctor today. (She didn't study medicine → She isn't a doctor.)

If they hadn't moved to the countryside, they would still live in the city. (They moved → They no longer live in the city.)

When to Use This Mixed Conditional

Use this form when you want to express how a past decision or event has shaped the current situation. It is especially useful in reflective writing, analysis of historical events, and discussions of cause and effect across time.

If the company had invested in renewable energy five years ago, it would be in a much stronger financial position today.

Mixed Conditional Type 2: Present Condition, Past Result

This combination uses a second conditional if-clause with a third conditional main clause. It describes a permanent or general characteristic and imagines how it would have affected a past situation.

Structure: If + past simple, would have + past participle

Examples

If I spoke Japanese, I would have understood the conversation. (I don't speak Japanese (general/permanent) → I didn't understand the conversation (past).)

If she weren't so stubborn, she would have apologized by now. (She is stubborn (present trait) → She hasn't apologized (past result).)

If he were a better driver, he wouldn't have crashed the car. (He is not a good driver (present) → He crashed the car (past).)

When to Use This Mixed Conditional

Use this form when a person's current nature, ability, or situation is the reason something did or didn't happen in the past. It is common in character analysis, performance reviews, and reflective essays.

If the government were more transparent, the public would have trusted its response to the crisis.

Wish and If Only

The structures wish and if only express regret, desire, or dissatisfaction. They follow specific tense patterns that mirror the conditional system.

Wish/If Only + Past Simple (Unreal Present)

Expresses a desire for the present situation to be different.

I wish I knew the answer. (I don't know it now.) If only she had more time. (She doesn't have enough time.) He wishes he lived closer to work. (He lives far away.)

Wish/If Only + Past Perfect (Unreal Past)

Expresses regret about something that happened (or didn't happen) in the past.

I wish I had studied harder. (I didn't study hard enough.) If only they had listened to the warnings. (They ignored the warnings.) She wishes she hadn't said that. (She said something she regrets.)

Wish/If Only + Would (Future Desire or Complaint)

Expresses a desire for someone or something to change behavior, or frustration about an ongoing situation.

I wish you would stop interrupting me. (You keep interrupting.) If only it would stop raining. (The rain continues.) She wishes he would be more careful. (He is careless.)

Important: Do not use wish + would about yourself. Instead, use wish + past simple.

Incorrect	Correct
I wish I would be taller.	I wish I were taller.
I wish I would know the answer.	I wish I knew the answer.

Formal Alternatives to If-Clauses

In formal writing (academic, business, legal), standard if can be replaced with more sophisticated structures.

Were + Subject (Formal Inversion)

Replace if + subject + were with were + subject.

Standard: If I were the manager, I would change this policy. Formal: Were I the manager, I would change this policy.

Standard: If it were not for your help, we would have failed. Formal: Were it not for your help, we would have failed.

Had + Subject (Formal Inversion for Third Conditional)

Replace if + subject + had with had + subject.

Standard: If she had known, she would have acted differently. Formal: Had she known, she would have acted differently.

Standard: If they had not intervened, the situation would have worsened. Formal: Had they not intervened, the situation would have worsened.

Should + Subject (Formal First Conditional)

Replace if + subject + verb with should + subject + verb for formal or less likely first conditionals.

Standard: If you have any questions, please contact us. Formal: Should you have any questions, please contact us.

Standard: If the package arrives damaged, return it immediately. Formal: Should the package arrive damaged, return it immediately.

Provided (That) / On Condition (That) / As Long As

These expressions add a conditional meaning with greater formality or emphasis.

You may leave early provided that you finish your work. The offer is valid on condition that payment is received within 30 days. We will proceed as long as all parties agree.

Unless, Even If, and Other Conditional Variations

Unless (= If...not)

Unless introduces a negative condition. It means "if...not" but is followed by an affirmative verb.

Unless you hurry, you will miss the train. (= If you don't hurry...) I won't go unless she invites me. (= if she doesn't invite me)

Caution: Do not use unless with negative verbs — it creates a double negative.

Incorrect	Correct
Unless you don't hurry...	Unless you hurry...

Even If (Concessive Conditional)

Even if indicates that the result holds true regardless of the condition.

Even if it rains, we will go. (Rain or no rain, we are going.) Even if I had known, I wouldn't have changed my mind.

Common Errors in Conditional Tense Combinations

Error 1: Using "Would" in the If-Clause

Incorrect	Correct
If I would have known, I would have helped.	If I had known, I would have helped.
If she would be here, she would help.	If she were here, she would help.

Error 2: Mixing Conditional Types Incorrectly

Mixed conditionals are valid only when the time references in the two clauses genuinely differ.

Incorrect	Correct
If I had money, I would have traveled last year. (if the real meaning is "I don't have money now and I didn't travel")	If I had had money, I would have traveled last year. (both past) OR If I had money, I would travel. (both present/future)

Error 3: Using "Was" Instead of "Were" in Unreal Conditions

In formal writing and standard grammar, were is used for all subjects in unreal/hypothetical conditions.

Less Formal	Formal / Standard
If I was rich...	If I were rich...
If he was here...	If he were here...

In academic and professional writing, always prefer were.

Tense Consistency in Extended Writing

Using multiple tenses correctly in a single sentence is one skill; maintaining tense consistency across paragraphs and entire essays is another. Extended writing demands that you choose a primary tense framework and shift away from it only when the content genuinely requires a different time reference. Unnecessary tense shifts confuse readers and undermine the credibility of your writing.

What Is Tense Consistency?

Tense consistency means that verbs within a passage follow a logical pattern. It does not mean using the same tense for every verb — that would be impossible in most real writing. Instead, it means:

1. Choosing a dominant tense appropriate to your writing type.
2. Shifting tenses only when the time reference changes.
3. Returning to the dominant tense after a necessary shift.

Consider this well-written paragraph:

The experiment demonstrates that temperature affects reaction speed. In the 2019 trial, researchers heated the solution to 80 degrees and observed a 40% increase. These results confirm earlier predictions and suggest that further testing is warranted.

The dominant tense is present simple (for discussing research findings — a convention in academic writing). The writer shifts to past simple only to describe the specific 2019 experiment, then returns to present simple. This is consistent and logical.

Now compare a poorly written version:

The experiment demonstrated that temperature affects reaction speed. In the 2019 trial, researchers heat the solution to 80 degrees and observe a 40% increase. These results confirmed earlier predictions and will suggest that further testing was warranted.

The tenses jump randomly with no logical pattern, making the paragraph confusing and unprofessional.

Choosing a Dominant Tense by Writing Type

Different types of writing use different dominant tenses. Choosing the right one from the start prevents most consistency errors.

Academic and Analytical Writing

Situation	Dominant Tense	Example
Discussing current research/theory	Present simple	Smith argues that...
Describing what a text says	Present simple	The novel explores themes of isolation.
Reporting specific past experiments	Past simple	The researchers collected data from 500 participants.
Describing findings that remain valid	Present simple	The data show a clear correlation.
Discussing historical events	Past simple	The policy was introduced in 2015.

Academic writing often uses what is called the "literary present" — present tense to discuss texts, theories, and findings. This is a convention, not a reflection of actual time.

Shakespeare uses dramatic irony to create tension. In Act 3, Hamlet pretends to be mad, but the audience knows his true intentions.

Narrative and Descriptive Writing

Situation	Dominant Tense	Example
Telling a story (most common)	Past simple	She walked into the room and sat down.
Present-tense narration (literary)	Present simple	She walks into the room and sits down.
Flashbacks within past narration	Past perfect	She remembered that he had promised to return.
Background description	Past continuous	The sun was setting over the hills.

In narrative writing, the most important rule is: once you choose past or present as your narrative tense, do not switch between them without a clear reason.

Business and Professional Writing

Situation	Dominant Tense	Example
Proposals and recommendations	Present simple / future	We recommend that... This will improve...
Progress reports	Present perfect + past simple	We have completed phase one. The team identified three issues.
Meeting minutes	Past simple	The committee discussed the budget.
Policy documents	Present simple	Employees are required to submit reports monthly.

IELTS and TOEFL Task Writing

Task	Dominant Tense
IELTS Task 1 (graph/chart)	Past simple (for past data), present simple (for current trends)
IELTS Task 2 (essay)	Present simple (for arguments and opinions)
TOEFL Independent Essay	Present simple
TOEFL Integrated Task	Present simple (for source content) + past simple (for lecture)

How to Handle Tense Shifts

Legitimate tense shifts happen when the content genuinely moves between time frames. The key is to make each shift clear and intentional.

Signal Your Shifts

Use time expressions to signal when and why you are changing tense.

The company currently employs 500 people. Last year, it employed only 300. By 2030, it expects to employ over 1,000.

The time expressions "currently," "last year," and "by 2030" make each shift logical and easy to follow.

Return to the Dominant Tense

After a temporary shift, return to your main tense explicitly.

The theory suggests that early intervention is critical. A 2020 study found that children who received support before age five showed significantly better outcomes. These findings support the argument that investment in early education pays long-term dividends.

The writer shifts to past simple for the specific study, then returns to present simple with "These findings support" — a clear signal that the discussion of current implications has resumed.

Paragraph Breaks as Tense Boundaries

New paragraphs are natural places for tense shifts. If you need to move from discussing current theory to a historical example, consider starting a new paragraph.

Common Tense Consistency Errors

Error 1: The Wandering Narrative

This occurs when a writer starts in one tense and drifts to another with no reason.

| Inconsistent | Consistent | |---|---|---| | She opened the door and sees a stranger. He is wearing a dark coat and looked nervous. | She opened the door and saw a stranger. He was wearing a dark coat and looked nervous. |

Error 2: Switching Between Literary Present and Past

When discussing a text, choose present or past and stay with it.

| Inconsistent | Consistent | |---|---|---| | In Chapter 1, the author introduces the protagonist. She described his childhood in detail. | In Chapter 1, the author introduces the protagonist. She describes his childhood in detail. |

Error 3: Tense Shifts in Lists and Series

When listing actions or points, keep them in the same tense.

| Inconsistent | Consistent | |---|---|---| | The study examined diet, measures exercise levels, and will track sleep patterns. | The study examined diet, measured exercise levels, and tracked sleep patterns. |

Error 4: Conditional Tense Bleeding

When a passage includes a conditional sentence, writers sometimes let the conditional tense leak into surrounding sentences.

| Inconsistent | Consistent | |---|---|---| | The plan is effective. If we implemented it, costs would decrease. The savings would be significant. (The third sentence incorrectly continues in conditional) | The plan is effective. If we implemented it, costs would decrease. Current estimates suggest savings of 15%. (Returns to present simple) |

Editing for Tense Consistency

Follow this process when revising your writing:

1. Identify your dominant tense. Read the first paragraph and note which tense appears most frequently. Is it appropriate for your writing type?

2. Underline every verb in a problematic paragraph. Write the tense next to each one.

3. Check each shift. Ask: "Does the time reference actually change here, or did I shift by accident?"

4. Look for patterns. Common trouble spots include:

   • The beginning of new paragraphs (writers sometimes unconsciously reset)
   • Transitions between examples and analysis
   • Lists and series of actions
   • Sentences following conditional statements

5. Read aloud. Unexpected tense shifts often sound jarring when read aloud, even if they are hard to spot on the page.

Tense Consistency Across Essay Sections

In a full essay, each section may have a slightly different tense profile, but the overall framework should remain stable.

Essay Section	Typical Tense Use
Introduction	Present simple (state thesis, introduce topic)
Body — current arguments	Present simple
Body — historical evidence	Past simple (shift back to present for analysis)
Body — future implications	Future (will/going to), then return to present
Conclusion	Present simple (restate thesis, broader implications)

The principle is consistent: present simple is the home base in analytical writing, and all shifts away from it should be purposeful and temporary.

Mixed Tenses Quick Reference

This section provides condensed reference tables and troubleshooting guides for all the mixed tense patterns covered in this module. Use it for quick review before writing or as a checklist during editing.

Backshift Reference Table

Use this table when converting direct speech to reported speech with a past-tense reporting verb.

Original Tense	Backshifted Tense	Example (Direct → Reported)
Present simple	Past simple	"I work here." → He said he worked there.
Present continuous	Past continuous	"I am leaving." → She said she was leaving.
Present perfect	Past perfect	"I have seen it." → He said he had seen it.
Present perfect continuous	Past perfect continuous	"I have been working." → She said she had been working.
Past simple	Past perfect	"I went home." → He said he had gone home.
Past continuous	Past perfect continuous	"I was reading." → She said she had been reading.
Will	Would	"I will call." → He said he would call.
Can	Could	"I can help." → She said she could help.
May	Might	"I may go." → He said he might go.
Must	Had to	"I must leave." → She said she had to leave.
Could / Would / Should / Might	No change	"I could try." → He said he could try.
Past perfect	No change	"I had finished." → She said she had finished.

Exceptions — no backshift required when:

• Reporting a universal truth (Water boils at 100°C)
• Reporting very recent speech (He just said he is coming)
• The reporting verb is in present tense (She says she is happy)
• The statement is still true (He said he lives in Paris — if he still does)

Conditional Combinations Chart

Standard Conditionals

Type	If Clause	Main Clause	Time Reference	Example
Zero	Present simple	Present simple	General truth	If ice melts, it becomes water.
First	Present simple	Will + base	Real future	If it rains, I will stay inside.
Second	Past simple	Would + base	Unreal present	If I were rich, I would retire.
Third	Past perfect	Would have + pp	Unreal past	If I had known, I would have helped.

Mixed Conditionals

Mix	If Clause	Main Clause	Meaning	Example
3rd → 2nd	Past perfect	Would + base	Past action → present result	If I had studied law, I would be a lawyer now.
2nd → 3rd	Past simple	Would have + pp	Present trait → past result	If she spoke French, she would have understood them.

Formal Inversions

Standard Form	Inverted Form
If I were...	Were I...
If she had known...	Had she known...
If you have questions...	Should you have questions...

Wish / If Only Reference

Structure	Time	Meaning	Example
Wish + past simple	Present	Want the present to be different	I wish I knew the answer.
Wish + past perfect	Past	Regret about the past	I wish I had studied harder.
Wish + would	Future / ongoing	Want someone to change behavior	I wish you would listen.
If only + past simple	Present	Stronger version of wish (present)	If only I had more time.
If only + past perfect	Past	Stronger version of wish (past)	If only I had accepted that job.

Multi-Tense Sentence Patterns

Pattern	Structure	Example
Present + Past (cause)	Present state + past reason	I am tired because I worked late.
Past + Earlier Past	Past simple + past perfect	When I arrived, she had already left.
Present Perfect + Present	Past-to-now + current state	I have read the report, so I understand the issue.
Present + Future	Current fact + future plan	I know he will arrive tomorrow.
Future time clause	Will + present simple in time clause	I will call you when I arrive.

Time Clause Tense Rules

Conjunction	Future Context (use present)	Past Context (normal sequence)
when	I'll help when I finish.	I helped when I finished.
before	Call me before you leave.	I called before I left.
after	We'll eat after she arrives.	We ate after she arrived.
until	Wait until the bus comes.	I waited until the bus came.
as soon as	I'll text you as soon as I land.	I texted her as soon as I landed.
once	We'll start once everyone is ready.	We started once everyone was ready.
by the time	I'll be done by the time you get here.	I was done by the time she got there.
while	Don't talk while the teacher is speaking.	He called while I was cooking.

Dominant Tense by Writing Type

Writing Type	Dominant Tense	Shift To
Academic essay	Present simple	Past simple for specific studies
Literary analysis	Present simple (literary present)	Past for historical context
Narrative / story	Past simple	Past perfect for flashbacks
Business proposal	Present simple + future	Past for background data
Progress report	Present perfect + past simple	Future for next steps
IELTS Task 1 (chart)	Past simple (past data) or present simple (current)	Varies by data timeframe
IELTS Task 2 (essay)	Present simple	Past for examples
News report	Past simple	Present perfect for recent events

Troubleshooting Guide

Use this checklist when you suspect tense errors in your writing.

Problem: "My paragraph feels choppy or confusing."

Check for: Unnecessary tense shifts. Underline every verb and note its tense. If the tenses jump without matching time-reference changes, you have a consistency problem.

Fix: Identify your dominant tense. Change any verb that shifted without reason back to the dominant tense.

Problem: "I'm not sure whether to backshift in reported speech."

Decision tree:

1. Is the reporting verb in the present tense? → No backshift needed.
2. Is the reported fact a universal truth? → Backshift is optional (present tense preferred).
3. Was it said very recently and is still true? → Backshift is optional.
4. Otherwise → Apply standard backshift.

Problem: "I don't know which conditional type to use."

Decision tree:

1. Is the condition real and likely? → First conditional (If + present, will + base).
2. Is the condition unreal or hypothetical right now? → Second conditional (If + past, would + base).
3. Is the condition about a past event that didn't happen? → Third conditional (If + past perfect, would have + pp).
4. Does the past event affect the present? → Mixed 3rd→2nd (If + past perfect, would + base).
5. Does a present trait explain a past outcome? → Mixed 2nd→3rd (If + past simple, would have + pp).

Problem: "I used 'will' in a time clause and it was marked wrong."

Rule: After when, before, after, until, as soon as, once, by the time, use present simple (not will) for future meaning.

Fix: Change will + verb to present simple in the time clause. Keep will only in the main clause.

Problem: "My essay switches tenses at the start of new paragraphs."

Check for: Unconscious tense resetting. Writers often start a new paragraph in a different tense without realizing it.

Fix: Read the last sentence of each paragraph and the first sentence of the next one. They should use the same tense unless you are deliberately shifting time frames (and if so, signal the shift with a time expression).

Problem: "I wrote 'If I would have...' and my teacher corrected it."

Rule: Never use would in the if-clause of a conditional sentence.

Fix: Replace If I would have + pp with If I had + pp. Keep would only in the main clause.

Editing Checklist for Mixed Tenses

Before submitting any piece of writing, run through this checklist:

• I have identified a dominant tense appropriate for my writing type.
• Every tense shift corresponds to an actual change in time reference.
• Time clauses (when, before, after, until, etc.) use present simple for future meaning.
• Reported speech follows backshift rules (or qualifies for an exception).
• Conditional sentences do not use "would" in the if-clause.
• Lists and series use parallel tense throughout.
• New paragraphs do not accidentally reset the tense.
• After temporary tense shifts (for examples or evidence), I return to the dominant tense.
• I have read the text aloud to catch any shifts that sound unnatural.