Tenses Concepts

1. Aspect Consistency

Concept: English has four main aspects: simple, continuous, perfect, and perfect continuous. Choose the aspect based on when and how long an action happened.

Rule: Use perfect continuous when an action continued for some time before another past event.

Example: She ___ for three hours when the power went out. (had been studying)

Answer: had been studying

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2. Past Habits

Concept: Past habits are actions that happened regularly in the past.

Rule: Use used to + verb or would + verb for repeated past actions.

Example: When I was a child, I ___ to visit my grandmother every summer. (used to go / went)

Answer: used to go

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3. Sequence of Tenses

Concept: The tense of one clause can affect the tense of another clause.

Rule: Usually, a past reporting verb is followed by a past tense. However, universal truths and scientific facts remain in the present tense.

Example: The teacher said that the Earth ___ around the Sun. (revolves / revolved)

Answer: revolves

The Earth revolving around the Sun is a universal truth.

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4. Future Time Reference

Concept: Different forms can express future events depending on whether they are planned, scheduled, or spontaneous.

Rule:

• will → decision, promise, prediction
• going to → plan or intention
• present continuous → fixed arrangement
• simple present → timetable or schedule

Example: The train ___ at 6 PM tomorrow. (departs / will depart)

Answer: departs

A timetable or fixed schedule commonly uses the simple present.

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5. Narrative Tenses

Concept: Different past tenses help show the order and progress of events in a story.

Rule:

• Simple past → main events
• Past continuous → action in progress
• Past perfect → earlier past action

Example: She ___ dinner when the guests arrived. (was preparing / prepared)

Answer: was preparing

The preparation was already in progress when the guests arrived.

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6. Conditional Tenses

Concept: Conditional sentences use different tense patterns depending on whether the situation is real, imaginary, or impossible.

Rule:

• Zero: If + present → present
• First: If + present → will + verb
• Second: If + past → would + verb
• Third: If + had + past participle → would have + past participle

Example: If I ___ known about the traffic, I would have left earlier. (had / have)

Answer: had

The complete form is “If I had known…”, which is a third conditional.