1. frightening → frightened

2. were took → were taken

3. helped → were helped

4. is composing → is composed

5. announcing → announced

7.invented → been invented

8.accompany → accompanied

9. was giving → was given

10.worry → worried

11.were happened → happened
12. go to → going to
13. work→ have worked
14. are not let→are not allowed
15. to service→ serviced
16. been → were served
18. writing → written
19. tore→ torn
20. was broken → broken

Xin hay nhất Ạ!!!!

=>
1. frightening -> frightened
2. were took -> were taken
3. helped -> were helped
4. is composing -> is composed
5. announcing -> announced
6. been -> bỏ
7. invented -> been invented
8. accompany -> accompanied
9. was giving-> was given
10. worry -> worried
11. were happened -> happened
12. go to -> going to
13. work -> have worked
14. are not let -> are not allowed
15. to service -> serviced
16. been -> were served
17. been -> bỏ
18. writing -> written
19. tore -> torn
20. was broken -> broken