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來源：網(wǎng)絡資源 2022-03-16 20:51:56
1) 把主動語態(tài)變?yōu)楸粍诱Z態(tài)時，其謂語動詞的時態(tài)要與原句時態(tài)保持一致，其謂語動詞的數(shù)要與新主語保持一致。
We have bought a new computer.
→A new computer has been bought. (正確)
→A new computer have been bought. (錯誤)
2)含有雙賓語的主動句變被動句時，可分別將其中的一個賓語變?yōu)橹髡Z，另一個不動，一般變間接賓語為主語時比較多。
My uncle gave me a present on my birthday.
→I was given a present on my birthday.
如果把直接賓語(指物)改為主語，則在間接賓語(指人)前加適當?shù)慕樵~，如上句還可以說
→A present was given to me yesterday.
3) 由動詞+ 介詞或副詞構成的短語動詞，要把它們作為整體看，即把它們看成一個及物動詞，介詞或副詞不可拆開或漏掉。
The patient is being operated on.
The problem is solved. It needn't be talked about.
His request was turned down.
The sports meet will be put off because of the bad weather
4)帶復合賓語(賓語+ 賓補)的動詞改為被動語態(tài)時，一般把主動結構中的賓語改為主語，而賓語補足語保留在謂語動詞后面。
We always keep the classroom clean.
→The classroom is always kept clean.
She told us to follow her instructions.
→We were told to follow her instructions.
注意：在see, watch, hear, notice, listen to, look at, make, feel等動詞后作賓語補足語的動詞不定式都不帶 to，但改成被動語態(tài)后必須還原to。
We often hear him play the guitar.
→He is often heard to play the guitar.
5)當主動句的主語是nobody, no one等含有否定意義的不定代詞時，被動句中將其變?yōu)閍nybody, 作by的賓語，并將謂語動詞變?yōu)榉穸ǖ谋粍诱Z態(tài)。
Nobody can answer this question.
誤：The question can be answered by nobody.
正：The question can not be answered by anybody.
6)當否定句中的賓語是anything, anybody, anyone等不定代詞時，在被動句中應將其分別變?yōu)閚othing, nobody, no one作主語，并將謂語動詞變?yōu)榭隙ǖ谋粍诱Z態(tài)。
They haven't done anything to make the river clean.
誤：Anything hasn't been done to make the river clean.
正：Nothing has been done to make the river clean.
7)以who為主語開頭的疑問句，變被動時，用by whom放在句首。
Who wrote the story?
誤：Who was the story written?
正：By whom was the story written?
8)有些動詞既是及物又是不及物，當它們和well, badly, easily等副詞連用時，表示主語內(nèi)在品質(zhì)或性能，是不及物動詞，用主動表示被動，這時不用被動語態(tài)，常見的有：write, read, clean, sell, wash, cook 等。
The cloth washes easily. 這布很好洗。
The new product sells well. 這新產(chǎn)品很暢銷。
The books sell well. 這些書銷量很好。
9)下列情況主動句不能改為被動句。
①感官系動詞一般用主動形式表示被動意義，如：feel，look, seem, taste, sound。
— Do you like the material?
— Yes, it feels very soft.
②不及物動詞沒有被動語態(tài)，如：rise, happen, succeed, remain, lie等。
When we got to the top of the mountain, the sun had already risen.
After the earthquake, few houses remained.
③賓語是反身代詞，相互代詞，同源賓語，不定式，v-ing形式及抽象名詞等，不能變?yōu)楸粍泳渥拥闹髡Z。
I taught myself English.
誤：Myself was taught English.
We love each other.
誤：Each other is loved.
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