Chuyển các câu sau sang bị động 

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31. I used to be taken to school by my father. 
- S + used to be + PII/ed + O + by...
32. All my washing has been done for years.  
- S + has/have + been + PII/ed + O
33. A nest has been built in the porch by a pair of birds since last week.
- Thứ tự: địa điểm - người (by...) - thời gian (chốn - nhân - gian) 
34. The murderers haven't been found yet.
35. One of her own paintings was sold at $1,000.
- Bị động QKĐ: S + was/were + PII/ed + O
36. Your gloves will be put in your drawer. 
- Bị động TLĐ: S + will be + PII/ed + O
37. English is spoken in almost every corner of the world.
- Bị động HTĐ: S + is/am/are + PII/ed + O
38. This machine mustn't be used after 5:30 pm.
- Bị động với động từ khuyết thiếu: S + must(n't) + be + PII/ed + O

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`31` I used to be taken to school by my father

`->` S + used to + V-inf

`->` bđ : S + used to + be + V-II + ( by O )

`32` All my washing has been done for years

`->` S + has/have + V-II

`->` bđ : S + has/have + been + V-II + ( by O )

`33` A nest has been built in the porch by a pair of birds since last week

`->` S + has/have + V-II

`->` bđ : S + has/have + been + V-II + ( by O )

`34` The murderers haven't been found by the police yet

`->` S + has/have + V-II

`->` bđ : S + has/have + been + V-II + ( by O )

`35` One of her own paintings was sold at $1,000

`->` S + V2/V-ed

`->` bđ : S + was/were + V-II + ( by O )

`36` Your gloves will be put in your drawer

`->` S + will + V-inf

`->` bđ : S + will + be + V-II + ( by O )

`37` English is spoken in almost every corner of the world

`->` S + V(s/es)

`->` bđ : S + am/is/are + V-II + ( by O )

`38` This machine mustn't be used after 5:30 p.m

`->` S + must + V-inf

`->` bđ : S + must + be + V-II + ( by O )