1.
Did,done. Cleaned. Watched. Slept. Helped. Coped. Stoped. Lived. Wrote,written. Learned.
2.
1)did
2)help
3)see
4)learned
5)watch
6)visit
7)bought
3.
1)I didn't help my sister with her English. Did you help your sister with her English?
2)You didn't have 6 lessons yesterday. Did you have 5 lessons yesterday?