1.His father will buy that car
2.A policeman has stopped the traffic
3. Hemingway wrote the book
4.People must not leave bicycles in the hall
5.They gave him 2 weeks to do work
6. You should close all the door before you to do bed
7.They are feeding seals in the zoo.
8.They are writing a specail edition for children
9.They were correcting their homework at 8a.m yesterday.
10.Are they explaining that lesson again?
Những câu tân ngữ không xác định( jkhoong có by+O) chuyển thành people/ they