1.

Bài 6

1;2;3 => đúng

4. sell -> sold

5. does -> did

6. buys -> bought

7. punishes -> punished

8. laughg -> laughed

9. know -> knew

10. doesnot -> didn't

11. do not -> didn't

12. teaches -> taught

13. build -> built

14. invite -> invited

15. disgust -> disgusted

16. sings -> sang

17. is -> was

18. wants -> wanted

19. surprises -> surprised

20. want -> wanted

Bài 6:

1. We move to a new house. => We moved to a new house. 

2.They bring a sandwich. =>They brought a sandwich. 

3.He doesn't do the homework. =>He did not do the homework. 

4.They sell cars. => They sold cars. 

5.Does he visit his friends? => Did he visit his friends? 

6. She buys a book => She bought a book.

7. The teacher punishes the boy. => The teacher punished the boy.

8. The little girl laughs at the beggar. => The little girl laughed at the beggar.

9. They know it. => They knew it.

10. He does not tell the lie. => He didn't tell lie.

11. They do not wait for anybody. => They didn't wait for anybody.

12. Who teaches you English? => Who teached you English?

13. The Mansons build the house. => The mansons built the house.

14. They invite us to their party. => They invited us to their party.

15. His manners disgust me. => His manners disgusted me.

16. She sings a lovely song. => She sang a lovely song.

17. It is time to start. => It was time to start.

18. He wants to kill the snake. => He wanted to kill the snake.

19. His conduct surprises me. => His conduct surprised me.

20. I want you to come with me. => I wanted you to come with me.

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