| Type | Example |
|---|---|
| Zero | If you heat water to 100 degrees celsius, it boils. |
| First | If it starts to rain, I will take an umbrella. |
| Second | If I won the lottery, I would travel the world. |
| Third | If you had woken up earlier, you wouldn’t have missed the flight. |
| Past action with present result | If I had finished that project, I would be a millionaire now. |
| Present condition with past result | If you were more hardworking, you would have succeeded. |
| Future action with past result | If I didn’t have an important meeting tomorrow, I would have stayed up late. |
Introduction
The third conditional is used to talk about hypothetical or unreal situations in the past. It speculates about how different actions or events might have led to different outcomes. It is often used to express regret or to comment on a situation that did not happen.
Formula
If + past perfect tense (had + past participle), + would/wouldn’t/could/couldn’t/etc have + past participle.
Example
If I had known you were in hospital, I would have gone to visit you.
- Explanation: In this example, “If I had known” uses the past perfect tense (had known), indicating a hypothetical situation that did not occur in the past. The main clause “I would have gone” uses would have followed by a past participle (gone) to describe an action that would have happened as a result of the past condition. This sentence expresses a regret about not visiting someone in the hospital because the speaker did not know about it at the time