定于从句练习The doctor did all_to save de wounded boy.A.what he co
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定于从句练习
The doctor did all_to save de wounded boy.
A.what he could B.he could C.everything which he could D.for which he could
为啥选B?先行词all 在从句中做什么成分呢?为什么不是填he could do?
The doctor did all_to save de wounded boy.
A.what he could B.he could C.everything which he could D.for which he could
为啥选B?先行词all 在从句中做什么成分呢?为什么不是填he could do?
![定于从句练习The doctor did all_to save de wounded boy.A.what he co](/uploads/image/z/7630290-18-0.jpg?t=%E5%AE%9A%E4%BA%8E%E4%BB%8E%E5%8F%A5%E7%BB%83%E4%B9%A0The+doctor+did+all_to+save+de+wounded+boy.A.what+he+co)
先行词在从句中是不做成分的,完整的从句是:
the doctor did all that he could did to save the wounded boy.
但是主语 the doctor 后面已经有一个did了,所以从句中的did被省略了,所以此处 he could 和 he could do 都可以,但是没有后者的选项,所以选B
the doctor did all that he could did to save the wounded boy.
但是主语 the doctor 后面已经有一个did了,所以从句中的did被省略了,所以此处 he could 和 he could do 都可以,但是没有后者的选项,所以选B
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