6. William writes a letter. 7. She washes the dishes every day. 8. Everyone sings this song. 9. He sweeps the floor. 10. I take care of my dog. 11. He opens the door. 12. The door is opened by him. 13. We set the table. 14. She pays a lot of money. 15.I draw a picture

Bị động - HTĐ: S + am/is/are + V3/ed 

Chủ động - HTĐ: S + V1/s/es

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6. A letter is written by William.

7. The dishes are washed every day.

8. This song is sung.

9. The floor is swept.

10. My dog is taken care of.

11. The door is opened.

12. He opens the door.

13. The table is set.

14. A lot of money is paid.

15. A picture is drawn.

`color{orange}{~MiaMB~}`