Tenses - Perfect and Continuous Forms
~11 min read
- Twelve tenses: Three times (past, present, future) x four aspects (simple, continuous, perfect, perfect-continuous) = 12 tense forms.
- Perfect: Connects two times: 'has done' = action completed up to now. 'had done' = completed before another past action.
- Continuous: Action in progress. 'is doing' (now), 'was doing' (past process), 'will be doing' (future process).
Tenses are tested both in Spotting Errors (~3 per set) and Sentence Improvement (~2 per set). CDS favours present perfect vs simple past, the past perfect for sequence, and conditionals embedded in narrative passages.
The Twelve Tenses Map
| Aspect | Past | Present | Future |
|---|---|---|---|
| Simple | I wrote | I write | I will write |
| Continuous | I was writing | I am writing | I will be writing |
| Perfect | I had written | I have written | I will have written |
| Perfect-Continuous | I had been writing | I have been writing | I will have been writing |
Present Perfect vs Simple Past
The single most common CDS tense trap. The Present Perfect (has/have + V3) links the past to now; the Simple Past (V2) refers to a finished time.
| Use Present Perfect when | Use Simple Past when |
|---|---|
| No specific past time given | Specific past time given |
| Action's result is relevant now | Action is finished, no connection now |
| With 'just, already, yet, ever, never, recently, since, for (period)' | With 'yesterday, last week, in 1947, ago, when' |
- Correct: I have lived in Pune for ten years. (still living)
- Correct: I lived in Pune from 2010 to 2020. (finished)
- Wrong: I have seen him yesterday. Correct: I saw him yesterday.
Past Perfect - The 'Earlier Past'
Use the Past Perfect (had + V3) for an action completed before another past action.
- The train had left before we reached the station.
- By the time he arrived, the meeting had ended.
- She told me she had finished the work.
Common CDS error: using simple past where past perfect is needed in 'by the time / before / after / when' constructions.
Wrong: When I reached the platform, the train left.
Correct: When I reached the platform, the train had left.
Continuous Forms
Stative verbs (verbs of state, feeling, possession) are NOT used in continuous tenses normally.
| Don't use in continuous | Examples |
|---|---|
| Senses | see, hear, smell, taste, feel |
| Mental state | know, understand, remember, believe, mean, think (= believe) |
| Emotion | love, like, hate, want, prefer |
| Possession | have (= own), belong, possess, own |
| Being | be, seem, appear, look (= seem) |
- Wrong: I am knowing the answer. Correct: I know the answer.
- Wrong: She is having two cars. Correct: She has two cars.
- But: She is having dinner (= eating) is correct.
Expressing the Future
- will / shall: spontaneous decision, prediction, promise. I'll help you.
- be going to: intention or evidence-based prediction. It's going to rain.
- present continuous: arranged plan. I am meeting him tomorrow.
- simple present: scheduled / timetabled event. The train leaves at 6.
- will be + -ing (future continuous): ongoing future action. This time tomorrow I will be flying to Delhi.
- will have + V3 (future perfect): action completed by a future point. By 2030, I will have retired.
Sequence of Tenses
When the main clause is in past tense, the subordinate clause usually shifts to past too.
| Main clause | Subordinate clause |
|---|---|
| He says | he is tired / he was tired / he will be tired |
| He said | he was tired / he had been tired / he would be tired |
Exceptions: universal truths and habitual facts stay in present even after past main clause.
- The teacher said that the sun rises in the east. (universal truth)
- I learnt that water boils at 100°C. (scientific fact)
CDS/OTA PYQ Examples
Q: Identify the error: I have seen / a very interesting film / yesterday. / No error
(a) I have seen (b) a very interesting film (c) yesterday (d) No error
Answer: (a) 'Yesterday' fixes the time in the past, so use Simple Past: 'I saw'.
Q: Improve: When I reached the station, the train already left.
(a) had already left (b) has already left (c) was already leaving (d) No improvement
Answer: (a) had already left — the train's departure preceded the speaker's arrival; use Past Perfect.
Q: Choose the correct verb: He ___ in this office since 2015.
(a) works (b) is working (c) has been working (d) worked
Answer: (c) has been working — Present Perfect Continuous with 'since' shows an action that started in the past and continues now.
Q: Identify the error: She is having / two brothers / and three sisters. / No error
(a) She is having (b) two brothers (c) and three sisters (d) No error
Answer: (a) 'Have' meaning 'possess' is not used in continuous form. Correct: 'She has'.
Q: Improve: The teacher told us that the earth went round the sun.
(a) goes round the sun (b) has gone round the sun (c) had gone round the sun (d) No improvement
Answer: (a) goes round the sun — universal truth stays in present tense even after a past main clause.
Q: Choose the correct option: By next April, I ___ here for ten years.
(a) will work (b) am working (c) will have been working (d) have worked
Answer: (c) will have been working — Future Perfect Continuous shows duration up to a future point.
Drill Tenses - Perfect and Continuous Forms for CDS/OTA
CDS/OTA-pattern items on Tenses - Perfect and Continuous Forms with answer keys and explanations.
Start Free Mock TestFrequently Asked Questions
What's the difference between 'I have lived' and 'I have been living'?
'Have lived' (Present Perfect) emphasises the fact; 'have been living' (Present Perfect Continuous) emphasises the duration and ongoing action. Both often acceptable; CDS prefers whichever the options force on you.
Why is 'I am knowing' wrong?
'Know' is a stative verb - it describes a mental state, not an action in progress. Stative verbs (know, believe, love, understand) are used only in simple tenses.
When do we use 'shall' vs 'will'?
Traditional rule: 'shall' with I/we for plain future; 'will' with you/he/she/they. For determination, reverse them. Modern usage favours 'will' for all persons; 'shall' survives mainly in offers ('Shall I help?') and legal language.
Is 'used to' a past tense?
'Used to + verb' refers to a past habit or state no longer true. 'I used to smoke' = I smoked regularly in the past but not now. Question form: 'Did you use to...?' (no 'd' on 'use').
Why is past perfect needed in 'After he had eaten, he left'?
To make the sequence absolutely clear. With 'after' the past perfect is optional ('After he ate, he left' is also correct) but with 'when' the past perfect is often required to avoid ambiguity.