1) a. Does your brother like football?
b. Likes
2)a. Are you doing
b.are watching
3) a. Did you go
b. Was,went
4) a. Did work
b.worked
5) a. is she doing
b.is playing, plays
6) a. Did buy
b. Bought, buys
7) a. is writing
b.he is, is writing
8) a.did finished
b. Finished