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，被動句中將其變為anybody, 作by的賓語，并將謂語動詞變為否定的被動語態。

　　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為nothing, nobody, no one作主語，并將謂語動詞變為肯定的被動語態。

　　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，表示主語內在品質或性能，是不及物動詞，用主動表示被動，這時不用被動語態，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，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，不能變為被動句子的主語。

　　I taught myself English.

　　誤：Myself was taught English.

　　We love each other.

　　誤：Each other is loved.

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