=>

1. The man is believed to have been killed by terrorists.

-> Chủ động: People/They believe/say that S was/were V3/ed

-> Bị động: It is believed/said that S was/were V3/ed

Hoặc: S is/are believed/said to have been V3/ed

2. Because of missing the first train, they were late for school.

-> because of N/Ving: bởi vì

3. He suggested singing a few songs.

-> suggest Ving: đề nghị, gợi ý

4. Does your aunt have to be met at the station?

->  have to V: phải làm gì

-> bị động have to be V3/ed

5. Diana has no difficulty in making friends.

-> have/has no difficulty in Ving: không gặp khó khăn trong việc gì