Masterclass: SC – Verb Tense & Voice • GMATCourse.mba

Core Philosophy: Time Logic in Grammar

Verb tense and voice errors on the GMAT test your ability to maintain logical time sequences and to choose between active and passive voice appropriately. Tense errors are usually about violating the established timeline of events in the sentence; voice errors are about unnecessary or inconsistent use of passive construction.

The GMAT does not require a specific tense — it requires that tenses be logically consistent with each other and with any time markers in the sentence. An earlier event should typically use a more past tense form than a later event.

Core Insight: Map the timeline of events in the sentence before choosing a tense. The past perfect ("had done") signals an action completed BEFORE another past action.

The GMAT Tense System

Timeline of Tenses

Past Perfect
had + past participle

Action completed BEFORE another past action. Use when sequencing two past events.

Simple Past
did / was / went

Completed action at a specific past time. Most common tense for GMAT narratives.

Present Perfect
has/have + past participle

Action started in past, continues to now, or relevant to present. Use with "since," "for," "recently."

Simple Present
does / is / goes

Current state, general truth, or habitual action. Use carefully — GMAT often tests this against simple past.

Tense Consistency Strategy

Map the timeline of events

Before choosing a tense, establish: which events happen first? Which are ongoing? Which are completed before others?

Check for time markers

"By the time," "before," "after," "since," "for," "already" — these signal which tense is required.

Active vs. passive: prefer active unless passive is justified

Use passive when the actor is unknown, unimportant, or better de-emphasized. Avoid passive when active is clearer and more direct.

Maintain tense consistency within a sentence

Unless there is a reason to shift tenses (a genuine temporal difference), all verbs in a sentence should maintain the same primary tense.

Worked Examples

Example 1 — Past Perfect

✗ The team submitted the report after they finished the analysis.

✓ The team submitted the report after they had finished the analysis.

The analysis was completed BEFORE the report was submitted → past perfect for the earlier event.

Example 2 — Present Perfect

✗ The company implemented the new system since 2018.

✓ The company has implemented the new system since 2018.

"Since" signals an ongoing action from past to present → present perfect required.

Example 3 — Active vs. Passive

✗ The board made a decision after a detailed analysis was conducted by the committee.

✓ The board made a decision after the committee conducted a detailed analysis.

Active voice is cleaner and more direct when the agent is known and relevant.

10 Verb Tense Traps

1. Past perfect overuse

Using "had done" when simple past is sufficient — past perfect is only needed when two past events need to be sequenced.

2. "Since" requires present perfect

Any clause using "since" to indicate ongoing duration requires present perfect, not simple past.

3. Tense shift without reason

Switching from past to present mid-sentence without a temporal reason.

4. Would vs. will confusion

"Would" is past-tense hypothetical; "will" is future-tense. Match the main clause tense.

5. Unnecessary passive voice

Using passive when the actor is known, relevant, and the active form is more direct.

6. Active-passive inconsistency

Mixing active and passive within a parallel structure.

7. Present perfect vs. simple past

Simple past requires a specific time reference; present perfect is used with "since," "for," "ever," "never," "recently."

8. "By the time" requires past perfect

"By the time X happened, Y had already happened" — the Y event needs past perfect.

9. Infinitive tense conflict

An infinitive's time reference may conflict with the main verb tense.

10. Future perfect overuse

"Will have done" is rarely needed on the GMAT — check whether simple future suffices.

Tense Quick Reference

Time Marker	Required Tense	Example
since [past year]	Present Perfect	has grown since 2015
for [duration]	Present Perfect	has worked here for ten years
by the time [past event]	Past Perfect	had already finished by the time she arrived
before [past event]	Past Perfect (for earlier)	had completed it before the deadline
in [specific past year]	Simple Past	launched in 2012
currently / now / today	Simple Present	currently manages three teams

10 GMAT-Style Practice Questions

Select your answer, then reveal the step-by-step explanation. Each question reflects real GMAT difficulty and format.

Question 1 of 10 GMAT Verbal

By the time the auditors arrived at the company headquarters, the CFO [already deleted/had already deleted/already has deleted/was already deleting] the relevant financial records. Which tense is correct?

Correct Answer: (B)

(B) is correct. "By the time the auditors arrived" signals two past events: (1) CFO deleted records — earlier, (2) auditors arrived — later. The earlier event requires past perfect: "had already deleted." (A) simple past doesn't sequence the events. (C) present perfect is wrong for a specific past event with a time marker. (D) past progressive suggests the action was ongoing when auditors arrived — changes meaning. (E) present perfect is wrong in a past context.

Question 2 of 10 GMAT Verbal

The engineering team [has been working/was working/worked/has worked] on the new platform since the project manager restructured the development process last spring. Which is correct?

Correct Answer: (A)

(A) is correct. "Since" indicates an action that began in the past and continues to the present → present perfect progressive: "has been working." (B) "was working" is simple past progressive — doesn't capture the ongoing-to-present nature. (C) "worked" is simple past — wrong with "since" for ongoing duration. (D) past perfect is used for past-before-past, not past-to-present. (E) simple present with "since" is grammatically incorrect.

Question 3 of 10 GMAT Verbal

The research committee discovered that the data [was manipulated/had been manipulated/has been manipulated/were manipulated] before the study results were published. Which is correct?

Correct Answer: (B)

(B) is correct. Two past events: data was manipulated first, then results were published. The earlier event (manipulation) requires past perfect: "had been manipulated." (A) simple past doesn't establish the sequence. (C) present perfect is wrong in an all-past context. (D) plural "were" — "data" on GMAT is often treated as singular, and more importantly, tense is still wrong. (E) conditional "would have been" is wrong in a factual past statement.

Question 4 of 10 GMAT Verbal

For over two decades, the organization [has advocated/advocated/had advocated/was advocating] for stricter environmental regulations, and it [continues/continued/was continuing] to do so today. Which combination is correct?

Correct Answer: (A)

(A) is correct. "For over two decades" + ongoing to present = present perfect: "has advocated." The action continues to present = simple present: "continues." (B) simple past + simple past is wrong — the action is still happening. (C) past perfect is for past-before-past, not past-to-present. (D) "continued" implies the action is no longer happening. (E) simple past "advocated" is wrong with "for over two decades" when the action is ongoing.

Question 5 of 10 GMAT Verbal

The senator announced that she [will introduce/would introduce/is introducing/introduced] the legislation during the next congressional session. Which is correct?

Correct Answer: (B)

(B) is correct. In reported speech following a past-tense main verb ("announced"), future reference shifts from "will" to "would." "She announced that she would introduce" follows the sequence of tenses rule. (A) "will" is technically not wrong in all contexts but on GMAT, reported speech prefers "would" after a past-tense reporting verb. (C) "is introducing" suggests it's happening now. (D) "introduced" puts the action before the announcement. (E) past perfect is wrong.

Question 6 of 10 GMAT Verbal

The pharmaceutical company [has submitted/submitted/had submitted/submits] its application to the regulatory agency in March, and the agency [is reviewing/reviewed/reviews/has reviewed] it over the following three months. Which combination is correct?

Correct Answer: (B)

(B) is correct. Both events are completed past actions at specific times ("in March," "over the following three months"). Simple past for both: "submitted...reviewed." (A) present perfect "has submitted" is wrong when a specific past time ("in March") is given. (C) past perfect "had submitted" is wrong — there's no second past event for which the submission needs to be sequenced as earlier. (D) "has reviewed" is present perfect — wrong for a completed past action. (E) same issue.

Question 7 of 10 GMAT Verbal

The architect who designed the original structure [will have retired/retired/has retired/retires] by the time the renovation project is completed next year. Which is correct?

Correct Answer: (A)

(A) is correct. "By the time [future event]" signals future perfect: something completed before a future reference point. "Will have retired by the time it is completed" — retirement will be completed before the future renovation completion. (B) simple past "retired" doesn't work with a future reference point. (C) "has retired" is present perfect — doesn't match the future "will be completed." (D) simple present doesn't capture the timing. (E) past perfect is for past-before-past, not past-before-future.

Question 8 of 10 GMAT Verbal

According to the contract, the supplier must deliver all components before the factory [begins/began/has begun/will begin] production next quarter. Which is correct?

Correct Answer: (A)

(A) is correct. Temporal clauses with "before," "after," "when," "until" use simple present to express future reference — NOT "will begin." This is a standard English rule. "The supplier must deliver before the factory begins" uses simple present for the future subordinate clause. (D) "will begin" is grammatically incorrect in a "before" subordinate clause on the GMAT. (B) "began" implies past. (C) present perfect is wrong. (E) past perfect is wrong.

Question 9 of 10 GMAT Verbal

The committee chair [has been / was / is / had been] an advocate for education reform for the past fifteen years. Which is correct?

Correct Answer: (A)

(A) is correct. "For the past fifteen years" signals an action that began in the past and continues to the present → present perfect: "has been." (B) "was" implies the advocacy has ended. (C) "is" ignores the duration phrase — "for the past fifteen years" requires a form that captures the span. (D) "had been" is for past-before-past sequencing. (E) "has being" is grammatically incorrect.

Question 10 of 10 GMAT Verbal

By 2025, the company [will have operated/will operate/operates/has operated] in more than 50 countries for at least a decade. Which is correct?

Correct Answer: (A)

(A) is correct. "By 2025" + "for at least a decade" indicates an action that will be completed (or have been ongoing for a full duration) by a specific future point → future perfect: "will have operated." (B) "will operate" is simple future — doesn't capture the "for at least a decade" duration. (C) simple present is wrong. (D) present perfect "has operated" could work if speaking from a current perspective, but "By 2025" places us in the future. (E) past perfect is wrong.

Key Takeaways

1. Map the timeline first

Which events happen first? Which are ongoing to present? Map before choosing tense.

"Since/for" → present perfect

Any ongoing duration from past to present uses present perfect, not simple past.

"By the time X happened" → past perfect

Events completed before another past event use past perfect.

4. Active voice is preferred

Use passive only when the actor is unknown, unimportant, or better de-emphasized.