Perfect Infinitive! Learn Perfect Infinitive with ModalVerbsin English withgrammar rules, example sentences, video and ESL picture.
The structure “have +past participle” is called a perfectinfinitive.
完美infini学校tive withmodal verbsin English: must have, can’t have, should have, shouldn’t have, needn’t have, ought to have, may have, might have, could have, would have.
Perfect Infinitives
Must Have + Past Participle
Usage:
Express a deduction about something that has happened. We feel quite sure about it.
Examples:
I didn’t hear her voice . Shemust have goneout.
I cannot find my watch; Imust have lostit.
Can’t Have + Past Participle
Usage:
Describe a deduction about something that didn’t happen in the past based on present evidence.
Examples:
Hecan’t have fallenin love with her. She’s married.
Thiscan’t have beenan economically sensible decision.
Should Have + Past Participle
Usage:
Express the idea that something was desirable or needed but didn’t take place.
Examples:
Sheshould have askedyou before borrowing your pen.
Weshould have hada proper discussion before voting.
Shouldn’t Have + Past Participle
Usage:
事情发生但它不是desirable.
Example:
Sheshouldn’t have takenthe matter too seriously.
Needn’t Have + Past Participle
Usage:
Express that something was done but it wasn’t necessary. The person who did it thought it was necessary.
Examples:
Heneedn’t have beenso careful.
Ineedn’t have knockedat the door since, in this way, I awoke the baby.(but I knocked)
Ought to Have + Past Participle
Usage:
Express an unfulfilled duty or obligation.
Example:
Iought to have comeearlier. I deeply regret.
May Have + Past Participle
Usage:
Express the possibility that an action took place in the past.
Example:
Alert readersmay have noticedthe misprint in last week’s column.
Might Have + Past Participle
Usage:
Express a past possibility.
Example:
Our neighborsmight have heardsome noises when our car was stolen.
Could Have + Past Participle
Usage:
Express past reference about something that was not carried out.
Examples:
Youcould have doneit.(You didn’t do it)
Youcould have toldme I had asnottynose!
Would Have + Past Participle
Usage:
Used in the Third Conditional.
Example:
Iwould have goneto university if my parents had had more money.(The speaker didn’t go to university.)
Perfect Infinitive with Modal Verbs | Picture
Last Updated on January 15, 2020
you are the best…
Learning
thx dears …..you’re amazing
thank u for the examples and pls make more
OBRIGADO, MUITO BOM