1.read
2.don't read
3.am writing
4.am not writing
5.are playing
6.aren't playing
7.Are they playing
8.helps
9.Does he help
10.doesn't help
11.Do you go
12.doesn't like
13.am not reading
14.Is he sleeping
15.don't go
16.eats
17.isn't eating
18.do
19.don't go
20.doesn't work
21.works
Начинаешь предложения с тех слов, которые с большой буквы - а так, лучше учи. Это базовые знания! :)