9 .Last summer I took a course on ____ .  A .how to make dresses B .how dresses be made  C .how to be made dresses D .how dresses to be made为什么不能选B

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9 .Last summer I took a course on ____ .  A .how to make dresses B .how dresses be made  C .how to be made dresses D .how dresses to be made为什么不能选B
9 .Last summer I took a course on ____ .
  A .how to make dresses B .how dresses be made
  C .how to be made dresses D .how dresses to be made
为什么不能选B

9 .Last summer I took a course on ____ .  A .how to make dresses B .how dresses be made  C .how to be made dresses D .how dresses to be made为什么不能选B
同学,很高兴回答你的问题
正确答案:【 A 】
on 是介词,后面可以接动词不定式作宾语,也可以接从句,如果选B,那个be动词应该变成are,因为是一个从句,在从句中的时态是现在时,应该用be的复数形式,不能用原形,另外,选B,接从句,还是有点别扭,因为这句话的主语是I,后面的逻辑主语也应该是I,如果选B,从句中的主语是dresses,很别扭
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不明白请继续追问,
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how to do 怎样做
B相 语法不对

如果是B的话,就要改成how dresses are made.要用are而不是be。be的话只存在在祈使句或者to be的不定式当中。

之所以选A不选B,是因为B项的系动词用错了,不应该是be,而应该是were。因为整个句子都是过去式所以不用be。

这句话意思是去年暑假我学了一门怎么样做裙子的课程,而不是怎么样的裙子被做。而且语法也有问题

on 是介词,介词后面可以接动词不定式作宾语,也可以接从句。
A就是how+动词不定式短语,这是一种与疑问词连用的动词不定式短语。又如:He told me about what to do for the speech. I don't know whom to ask.
B不是从句,因为它没有谓语动词。要把 be改成are就可以了。be动词只有转换成am, is, are,...

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on 是介词,介词后面可以接动词不定式作宾语,也可以接从句。
A就是how+动词不定式短语,这是一种与疑问词连用的动词不定式短语。又如:He told me about what to do for the speech. I don't know whom to ask.
B不是从句,因为它没有谓语动词。要把 be改成are就可以了。be动词只有转换成am, is, are, was, were, have been, has been, had been时才可以作谓语。

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