i'm downloading some songs by SHE{为什么不能用C}不是 some songs{which are sung by吗Aare singingBsingingCare sungDsung

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i'm downloading some songs by SHE{为什么不能用C}不是 some songs{which are sung by吗Aare singingBsingingCare sungDsung

i'm downloading some songs by SHE{为什么不能用C}不是 some songs{which are sung by吗Aare singingBsingingCare sungDsung
i'm downloading some songs by SHE{为什么不能用C}不是 some songs{which are sung by吗
Aare singing
Bsinging
Care sung
Dsung

i'm downloading some songs by SHE{为什么不能用C}不是 some songs{which are sung by吗Aare singingBsingingCare sungDsung
这个是考察非谓语动词,I am 中am已经是谓语动词了,一个句子中只能有一个谓语,sung by SHE是非谓语动词短语,在这里用做定语修饰some songs.因为是被动所以用sung,如果用are sung就有两个谓语了

A 和c绝对不能选,前面I'm是谓语,一个简单句里只能有一个谓语,不管选a还是c 句子都有两个谓语了

定语后置,be动词应当省略,are singing 表主动表进行,可是句中没有说正在进行,句中强调的是some songs sung by SHE, sung by SHE在句中所起的作用是修饰some songs,但它不能充当谓语动词,所以只能作为非谓语动词置于句后,必修五的人教版的英语教材里的例句
he became inspired when he thought about hel...

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定语后置,be动词应当省略,are singing 表主动表进行,可是句中没有说正在进行,句中强调的是some songs sung by SHE, sung by SHE在句中所起的作用是修饰some songs,但它不能充当谓语动词,所以只能作为非谓语动词置于句后,必修五的人教版的英语教材里的例句
he became inspired when he thought about helping ordinary people (who are)括号里这个是补充exposed to cholera.be exposed to暴露在什么什么之下在从句中做非谓语动词,对句子做补充说明的作用。你说的这个句子的考点是非谓语动词短语(分词和不定式)做定语时,be动词必须省略

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