Present Perfect

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Present Perfect Past Simple
Present Perfect Past Simple
() Have / Has past participle (-ed / 3rd column) We have watched / He has spoken (-) havent / hasnt past participle They havent stopped She hasnt left (?) Have /Has subj past part. ? Have you danced ...? Has she seen ...? () verb ed or 2nd column We watched / He spoke (-) didnt infinitive They didnt stop She didnt leave (?) Did subj infinitive ? Did you dance ...? Did she see ...?
Time references yet, already, since, for, just, in the last, recently, lately, today Time references Last, yesterday, this morning, in 2002, for, when