перевірити навички вживання модальних дієслів з Perfect Infinitive
Jane ............... have gone to Switzerland, but I'm not totally sure.
You .................. have lied to me! Why didn't you tell me the truth?
Ann ................ to have seen a doctor weeks ago. Why didn't she?
They .................have seen the play last night as they went to a football match instead.
John ............... have been here by now. Maybe he got stuck in traffic.
You ............... have been really excited when you heard you'd won the competition.
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