Third Conditional
Use the third conditional to talk about imagined past situations that did not happen, and to express regret or criticism about the past.
Level B2
Conditionals
Summary
- Use the third conditional to talk about imagined past situations that did not happen, and to express regret or criticism about the past.
Structure
if + past perfect, ... would have + past participle
Examples
- If I had studied harder, I would have passed the exam.
- She would have come if you had invited her.
- If they hadn't missed the train, they wouldn't have been late.
- I would have helped if I had known.
Common mistakes
- • Don't mix tenses: NOT 'If I would have known' → 'If I had known.'
- • Use 'would have + past participle' in the main clause, not just 'would'.
More conditionals
First Conditional
B1
Use the first conditional for real or likely situations in the future and their probable results.
Zero Conditional
B1
Use the zero conditional for facts and things that are always true — when one thing happens, the result always follows.
Second Conditional
B2
Use the second conditional for unreal, hypothetical, or unlikely situations in the present or future, and their imagined results.
Mixed Conditional
C1
Use a mixed conditional when the time of the condition and the time of the result are different — for example, a past condition with a present result, or a present condition with a past result.