31. Сделайте предложения отрицательными: 1) He carried the box. 2) I skated last Sunday. 3) He copied the list of words. 4) We stayed at the hotel. 5) They tried to find his address. 6) She clapped her hands. 7) They travelled by train. 8) I switched off the scanner. 9) He dropped the glass. 10) The piano occupied the whole room. 11) Jerry replied to the letter immediately.

1. He didn’t carry the box.
2. I didn’t skate last Sunday.
3. He didn’t copy the list of words.
4. We didn’t stay at the hotel.
5. They didn’t try to find his address.
6. She didn’t clap her hands.
7. They didn’t travel by train.
8. I didn’t switch off the scanner.
9. He didn’t drop the glass.
10. The piano didn’t occupy the whole room.
11. Jerry didn’t reply to the letter immediately.

После didn’t смысловой глагол употребляется в начальной форме.