1) spent
2) didn't spend
3) Did he spend...
4) Where did he spend...
5) helped
6) didn't help
7) Did she help...
8) How did she help...
9) cooks
10) will cook
11) is cooking
12) cooked
13) don't eat
14) am eating
15) shall eat
16) ate
17) Do you go...
18) Are you going...
19) Will you go...
20) Did you go...
21) What does your brother do...
22) What is your brother doing...
23) What will your brother do...
24) What did your brother do...