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Home/Grammar B2/Third Conditional

Third Conditional

B2

The Third Conditional uses If + Past Perfect, would/could/might have + past participle. It refers to hypothetical past situations: things that didn't happen and their imagined consequences: If I had studied harder, I would have passed.

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Exercises:

Exercise 1 (Easy): Choose the correct Third Conditional form

Choose the correct form. Third Conditional: If + Past Perfect, would/could/might have + past participle.

Exercises:

1

If I had studied harder, I ___ the exam.

would have passedwould passhad passed

2

If she ___ earlier, she wouldn't have missed the flight.

lefthad leftwould have left

3

He ___ the job if he had prepared better for the interview.

would have gotgetsgot

4

If they ___ us, we would have been lost.

didn't helpwouldn't have helpedhadn't helped

5

I ___ you if I had known your number.

calledwould callwould have called

6

If it ___ so cold, we would have gone for a walk.

weren'thadn't beenwasn't

7

She ___ ill if she had eaten that fish.

might have gotmight gethad got

8

If he had listened to the doctor, he ___ so much pain.

hadn't been inwouldn't be inwouldn't have been in

9

We ___ the project on time if we had had more staff.

had completedcould have completedcould complete

10

If you ___ me, I wouldn't have made such a mistake.

had warnedwould have warnedwarned

Third Conditional (B2)

The Third Conditional describes hypothetical situations in the past: things that did not happen, and their imagined consequences. It is often used to express regret or criticism.

Structure

IF-CLAUSE

If + Past Perfect

If I had known…

RESULT CLAUSE

would / could / might + have + pp

…I would have told you.

Result modals: would / could / might

would have(Certain imagined result)

If she had tried, she would have succeeded.

could have(Possible ability or opportunity)

If they had practised, they could have won.

might have(Uncertain possibility)

If he had eaten less, he might have felt better.

should have(Advice / criticism (what was the right thing to do))

If you had asked, I should have helped. / You should have called if you had a problem.

💡 Contraction tip: In spoken English, would have is often contracted to 'd have and would not have to wouldn't have: If I'd known, I wouldn't have come.

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