Помогите пожалуйста!!!!Поставить глагол в правильной форме.1.Mr.Smith often (to ask) you to

Помогите пожалуйста!!!!
Поставить глагол в правильной форме.
1.Mr.Smith often (to ask) you to dinner?
2.By this time next year he (to leave) school.
3.At this moment they (to do) an exercise on tenses.
4.I (to speak) to him only yesterday.
5.You (to prepare) to your examinations next week.
6.I already (to fill) the coffe pot.
7.He (not to play) football.
8.What you (to do) yesterday evening?
9.We yet (not to listen) to that record.
10.When they (to come) I already ( to send) the children away.
11.They (not to play) tennis together since last May.
12.You (to come) home by 5 o'clock yesterday.
13.She (to come) back on Tuesday.
14.Your brother (to study) French at school last year?
15.She (to talk) to her friend at this time yesterday.