1. This button mustn't be touched.
2. That song is being sung by the famous singer.
3. Our work has been finished in time.
4. A letter has just been sent to me by my friend.
5. A letter has been written to my friend recently.
6. A big cake has already been made by the girl.
7. Housework hasn’t been done by the woman yet.
8. They have been helped by a nice girl.
9. These pictures have just been painted by the artist.
10. These products were sold yesterday.
11. This bridge was built in 2005.
12. She has just been called by me.
13. He was praised for his best behavior.
14. They were stopped by the police because they drove too fast.
15. We were asked a lot of questions by the examiner.
16. These children were given money by my mother.
17. Those letters have been typed by Lan for a long time.
18. These posters were hung on the board by Hung.
19. My house is cleaned by me every day.
20. The dog will be taken to the doctor by them.
21. The newspaper is delivered by John every morning.
22. Letters are often written to me by my sister.
23. His children are loved very much by Mr. Green.
24. He is being given the details of the talk by them.