Я правильно поняла, что надо просто в прошедшее время переделать?
1) I often saw them in the park.
2) Did your pupils read English books?
3) Her mother taught chemistry at school
4) We didn't know his adress
5) He got up, washed, dressed, had breakfast and went to school.
6.) Did the doctor speak English?
7.) We understood the rule
8.) My friend didn't like such films
9.) In summer we picked berries and mushrooms
10.) They didn't change trains there.
11.) This worker repaired his car himself