EXERCISE 1
1. I didn't buy ..
.
2. My friends didn't play ...
3. They didn't go ...
4. On Sunday we didn't have ...
5. There weren't ...
EXERCISE 2
1) Did Tom forget ...
2) Did she feel ...
3) Did I do ...
4) Did they work ...
5) Did my father build ...
EXERCISE 3
1) I left ...
2) We usually wrote ...
3) They swam ...
4) I saw ...
5) He rode ...