=>

1. frightening -> frightened

-> be adj (người -> tính từ đuôi ed)

2. were took -> were taken

-> bị động QKĐ was/were V3/ed

3. have been murdered -> have murdered

-> dạng chủ động (không có been)

4. to service -> serviced

-> get sth V3/ed

5. announcing -> announced

-> bị động HTHT have/has (not) been V3/ed

6. been -> x

-> bị động HTĐ is/am/are V3/ed

7. has -> was

-> bị động QKĐ was/were S V3/ed

8. accompany -> accompanied

-> bị động HTĐ is/am/are V3/ed

9. to work -> to have work

-> Chủ động: People/They believe that S V2/ed

-> Bị động: S is/am/are believed to have V3/ed

10. let -> allowed

-> be allowed to V: được cho phép làm gì

`1`.frightening `->` frightened

`->` Adj-ed dùng để diễn tả về cảm xúc , tình cảm của ai đó

`2`.took `->` taken

`->` BĐ `-` QKĐ : S + was / were + VpII ( by O ) ( `2 , 7` )

`=>` You , We , They `+` were

`3`.been `->` Bỏ

`->` BĐ Đặc biệt ( `3 , 9` ) :

`=>` S + is / am / are / ... + VpII + to have VpII [ Mệnh đề `2` `=` Quá khứ ] 

`4`.to service `->` serviced

`->` BĐ Nhờ vả :

`=>` S + have / get + sth + VpII ( by O )

`5`.announcing `->` announced

`->` BĐPĐ `-` HTHT : S + haven't / hasn't + been + VpII ( by O )

`=>` He , She , It `+` has

`6`.been `->` Bỏ

`->` BĐ `-` HTĐ : S + is / am / are + VpII ( by O ) ( `6 , 8` )

`=>` He , She , It `+` is ( `6 , 8` )

`7`.has `->` was

`=>` He , She , It `+` was

`8`.accompany `->` accompanied

`9`.work `->` have worked

`10`.let `->` allowed

`->` be allowed to + V-inf : Được cho phép làm gì

`\text{# TF}`