Conditional perfect is an English grammatical tense. It relates an action that someone would have done.
Form:would + have + past participle ( past participle -> (infinitive + -ed) or (3rd column of the table of the irregular verbs) )
Use
We use it for something that might have happened in the past.
We use it in the main clause in type III of the if clauses.
Examples
Affirmative
You would have gotten more money if you had worked harder.
If we had run faster, we would have arrived earlier.
If I were a woman, I would have entered the contest.
Interrogative
Would you have traveled around the world?
Negative
I wouldn't have stayed in my hometown.
It is also possible for the auxiliary would to be replaced by the modals should, could or might to express appropriate modality in addition to conditionality.
Sometimes, in informal speech, the would have construction appears in the if-clause as well ("If we would have run faster, we would have arrived earlier"), but this is considered incorrect in formal speech and writing.
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Conditional Perfect Form and Uses
Conditional perfect is an English grammatical tense. It relates an action that someone would have done.
Form: would + have + past participle ( past participle -> (infinitive + -ed) or (3rd column of the table of the irregular verbs) )
Use
Examples
Affirmative
Interrogative
Negative
It is also possible for the auxiliary would to be replaced by the modals should, could or might to express appropriate modality in addition to conditionality.
Sometimes, in informal speech, the would have construction appears in the if-clause as well ("If we would have run faster, we would have arrived earlier"), but this is considered incorrect in formal speech and writing.