Bài 1:Viết lại câu thành dạng phủ định và nghi vấn.
1. He sent letters to his parents.
(-) …………………………………………………………………………………………
(?) …………………………………………………………………………………………?
2. My brother spent his summer holiday on the farm.
(-) ………………………………………………………………………………………….
(?) …………………………………………………………………………………………. ?
3. The people were friendly .
(-) ……………………………………………………………………………………………
(?) …………………………………………………………………………………………… ?
3. Liz enjoyed her summer vacation last year.
(-) …………………………………………………………………………………………….
(?) ……………………………………………………………………………………………?
4. Nam was absent from school yesterday
(-) …………………………………………………………………………………………….
(?) …………………………………………………………………………………………… ?