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If - third conditional

If + subject+ past perfect verb phrase, subject + would + have + past participle verb

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Subject + would + have + past participle verb + if + subject + past perfect verb phrase

Third Conditional - Explain

1 = An event in the past that did not happen.

if second conditional
if second conditional

2 = An event which would have followed 1, if 1 had have happened.

Past

Now

Future

Past perfect tense

would have past participle

Third Conditional - Examples

1 = An event in the past that did not happen.

Image by sydney Rae
Stomach Pain

2 = An event which would have followed 1, if 1 had have happened.

Past

Now

Future

had eaten this

would have been ill

If I had eaten this, I would have been ill.

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I would have been ill if I had eaten this.

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  • Did event 1 happen? No.

  • Did event 2 happen? No.

  • If event 1 did happen, would event 2 happen? Yes.

1 = An event in the past that did not happen.