Em hãy chuyển những câu sau sang dạng phủ định và nghi vấn
1. she went to school yesterday
2. she was 13 last month
3. they were his friends
4. my father visited Hue last week
5. the dentist filled a cavity in her tooth last week
6. Hoa had a toothache
7. liz bought many souvenirs in Ho Chi Minh City
8. I was very tired after the trip
9. they are watching my father's new motorbike
10.we visited cham temples last month