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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.
while I was sleeping my mum was making dinner
2 I haven't prepared
3 I went to Paris in 2014
4 entered,were talking
5didn't study ,was
6have just finished
7 has never seen