=>
1. A letter is written to my aunt once a month.
-> bị động HTĐ is/am/are V3/ed
2. My aunt's house was broken into yesterday.
-> bị động QKĐ was/were V3/ed
3. 3 books about children have been written by Jane Austen this year.
-> bị động HTHT have/has been V3/ed
4. The crop in the field is being harvested by farmers at the moment.
-> bị động HTTD is/am/are being V3/ed
5. He was being followed at that time.
-> bị động QKTD was/were being V3/ed
6. His assignment will be handed in to the teacher by Fred in a few minutes.
-> bị động will be V3/ed
7. The trees are going to be cut down to widen the road.
-> bị động is/am/are going to be V3/ed
8. The victim had been taken to the hospital before the police arrived.
-> bị động QKHT had been V3/ed
9. All the decorations can be taken down right now.
-> can be V3/ed
10. Football is said to be a kind of busniness in some countries.
-> S be said to V