Ex1:
1. The room is cleaned twice a week
2. English is learnt at school
3. The tree will be cut tomorrow
4. Two trees are planted every year
5. A beautiful flower is bought
6. Their house was painted green
Ex2:
1. started
2. haven't seen
3. has been
4. cleans
5. moved
6. helping
7. close
8. to let
10. watch
11. is becoming
12. to learn
13. recycle
Ex3:
1. sleep -> sleeping
2. come -> came
3. bought -> buy
4. get -> getting
Chúc bạn học tốt !