Ex.3
1. ate
2. watched
3. sang
4. visited
5. returned
6. wrote
7. saw
Ex.4
1. I didn't walk the dog last night.
2. Fred and me didn't go fishing last Saturday.
3. She didn't tidy her room yesterday afternoon.
4. I didn't ride a scooter yesterday.
5. They didn't read the latest Harry Potter book.
