What verb is used to form the present perfect?, To have., To do., To eat., Answer this question in the negative: have you done your homework?, No, I haven't., No, I hasn' t., What do we use with questions and negative forms?, Already., Yet., In which cases is the present perfect used?, from past to present, repeated activities and unusual activities., from past to present, repeated activities and daily activities., daily activities, repeated activities, and unusual activities., What is the structure of the present perfect?, Subject+verb auxiliar+past participile., Verb+adjective+subject., Verb+subject+past participle .

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