1. Letters are typed in the office by Mary.
2.You will be helped tomorrow by his father.
3.English are being learnt/learned in the room.(they ko use 'by')
4.I was sent a present last week.
5.Tea can't be made with cold water.
6.My books has been taken away. (somebody thường ko use 'by')
7.The meeting will be held before May Day.
8.A cake is being cut with a sharp knife by Mary.
9.Is English taught here?
10.She will be invited to your wedding day.(you ko use 'by')
11.The house is cleaned everyday.(he ko use 'by')
12.He should be taken to the hospital.
13.English hasn't been spoken for a long time.
14.The trees are being planted in the garden by my mother.
15.Will a big house be built in this village?
16.Has this game been played by John before?
17.A lot of cakes were made last week.
18.Is Mai being helped in the house by Mary?
19.This zoo has been visited before.(we ko use'by')
20.You will be asked some questions.(she ko use 'by')
* Trong câu bị động “by + O” luôn đứng sau trạng từ chỉ nơi chốn (adverbs of place) và đứng trước nó là trạng từ chỉ thời gian (adverbs of time).
Xin CTLHN ạ!