1 .Nam has painted this picture all the morning.
2. Nam hasn’t painted this picture all the morning.
3. Has Nam painted this picture all the morning?
4. They haven’t finished our new school yet .
5. Have you answered your teacher’s question yet?
6.We will grow a lot of trees in the parks.
7.We will not grow many trees in the parks.
8. Will we grow many trees in the parks ?
9. His parents are going to buy a new house near here .
10. What should we do now ?
11. Hoa can’t do this work.
12. We must do something when it’s too late.
13. They used to drink beer for breakfast in England years ago.