Не спец в английском. Но по-моему, должно быть так
1)
1. My son can swim
2. We must meet at 7 o'clock.
3. You must not miss your classes.
4. He has done his homework Now he may go for a walk.
5. You must help your little sister.
2) используйте Present Simple или Present Progressive.
1. Tom is in his room. He is playing the piano. (to play)
2. As a rule I go to school by bus. (to go)
3 His sister studies at school. (to study )
4. They are playing football now. (to play)
5. Run downstairs. Your sister is waiting for you (to wait)
3) употребите past simple в след. предложениях
1. We translated this text last lesson. (to translate)
2. My father went to Moscow yesterday (to go)
3. My friend wrote to me very often last year. (to write)
4. When did you last go to the theatre? (to go)
5. I didn't see him for three years. (not see)
4) раскройте скобки, употребляя глагол в Past Simple или Past Progressive
1. We were having dinner when you phoned me.
2. Where did you spend last weekend?
3. My mother was cooking dinner when the lights went out.
4. Last year I went to London.
5. l didn't do my homework yesterday.
5)раскройте скобки, употребляя глаголы в present,past или future simple Passive.
1. Books by A. Christie always are read with interest.
2. They often are invited to parties.
3. We were shown a new film last week
4. Tickets will be brought tomorrow.
5. We were given soup for dinner yesterday.