1) works
2) does he work
3) doesn't work
4) read
5) do they read
6) don't read
7) are eating
8) are children eating
9) aren't eating
10) do you play
11) do you play
12) does Nick do
13) does he go
14) don't dance
15) is dancing
16) does Kate sing
17) does he go
18) doesn't sleep
19) sleeps
20) do you sleep
21) doesn't sleep
22) does John live, lives
23) speak
24) speaks, does
25) doesn't speak