Tenses
Tense shows the time of an action (past, present, future) and its aspect (simple, continuous, perfect, perfect continuous). In the CBSE Class 10 Grammar section, tenses are tested through gap filling, editing/omission, and as part of reported speech. You are never asked to define a tense — you are asked to choose or correct the right verb form in context.
The Twelve Tense Forms at a Glance
| Tense | Structure | Example |
|---|---|---|
| Simple Present | V1 / V1 + s/es | She writes a diary every night. |
| Present Continuous | is/am/are + V-ing | They are preparing for the board exam. |
| Present Perfect | has/have + V3 | He has finished his project. |
| Present Perfect Continuous | has/have been + V-ing | I have been living here since 2019. |
| Simple Past | V2 | The train left at 6 p.m. |
| Past Continuous | was/were + V-ing | We were watching the news when the lights went out. |
| Past Perfect | had + V3 | The show had started before we arrived. |
| Past Perfect Continuous | had been + V-ing | She had been teaching for ten years before she retired. |
| Simple Future | will/shall + V1 | I will call you tomorrow. |
| Future Continuous | will be + V-ing | They will be travelling at this time next week. |
| Future Perfect | will have + V3 | By June, he will have completed the course. |
| Future Perfect Continuous | will have been + V-ing | By 2030, she will have been working here for a decade. |
Choosing the Right Tense: Signal Words
- Simple Present: always, usually, every day, generally; universal truths (The sun rises in the east.)
- Present Continuous: now, at present, these days, look!, listen!
- Present Perfect: just, already, yet, ever, never, so far, recently
- Perfect Continuous forms: since + point of time (since Monday), for + period of time (for two hours)
- Simple Past: yesterday, last week, ago, in 2015
- Past Perfect: before, after, by the time — for the earlier of two past actions
- Future Perfect: by tomorrow, by next year, by the time
Key Transformation Patterns
Gap-filling questions often hide a transformation inside them. Learn these shifts:
- Two past actions: earlier action → past perfect; later action → simple past. When I reached the station, the train had left.
- Since/for with present time: use present perfect continuous. It has been raining since morning.
- Time clauses (when/as soon as/until) about the future: use simple present, not will. I will call you when I reach home.
- Conditional Type 1: If + simple present, will + V1. If she works hard, she will succeed.
- Conditional Type 2: If + simple past, would + V1. If I were you, I would apologise.
- Conditional Type 3: If + past perfect, would have + V3. If he had studied, he would have passed.
Stative Verbs — No Continuous Form
Verbs of feeling, thinking, possession and perception are normally not used in the continuous: know, believe, understand, love, hate, want, own, belong, seem, remember. Say I know the answer, never I am knowing the answer.
Common Errors
| Incorrect | Correct | Why |
|---|---|---|
| I am living here since 2020. | I have been living here since 2020. | Since + present time needs present perfect continuous. |
| She has completed the work yesterday. | She completed the work yesterday. | A finished past time word (yesterday) demands simple past, not present perfect. |
| When he will come, I will tell him. | When he comes, I will tell him. | No will in a future time clause; use simple present. |
| The train left before we had reached. | The train had left before we reached. | Past perfect goes with the earlier action, not the later one. |
| I am understanding the lesson now. | I understand the lesson now. | Understand is a stative verb; no continuous form. |
| If I would have known, I would have come. | If I had known, I would have come. | Type 3 conditional: the if-clause takes past perfect, never would have. |
How CBSE Tests Tenses
- Gap filling (MCQ): a sentence with a blank and four verb-form options. Scan for signal words (since, yesterday, by next year) before choosing.
- Editing: one wrong verb form per line — usually a tense mismatch such as has went, did not knew, or a wrong helping verb. Write the incorrect word and the correction as asked.
- Reported speech link: when the reporting verb is in the past, tenses in the reported clause move one step back (present → past, past → past perfect). Revise this together with Chapter 32.
- After did, does, do, to, modal verbs — always use V1: did not know, can speak.