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Past Simple,Past Continuous,Present Perfect
1)While I(to sleep)my mom(to make)dinner.
2) I(not to prepare) my task yet.
3)I(to go) to Paris in 2014.
4) When I(to enter) the room my students(to talk).
5) Last Monday he(not to study)at school because he(to be) ill.
6) They( just to finish) their class.
7) She (never to see) such a curious boy.