When you get you r paper back,pay special attention to ( what) have been marked.为啥不用which

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When you get you r paper back,pay special attention to ( what) have been marked.为啥不用which

When you get you r paper back,pay special attention to ( what) have been marked.为啥不用which
When you get you r paper back,pay special attention to ( what) have been marked.为啥不用which

When you get you r paper back,pay special attention to ( what) have been marked.为啥不用which
首先,你想填which,是一个定语从句.定语从句就要有先行词.可以说成When you get your paper back,pay special attention to words/problems which have been marked.
如果要填一个词,就必须填what.此时,这个句子是一个名词性从句,即一个宾语从句.pay special attention to 做谓语后面从句做宾语.此时需要用宾语从句引导词what引导.

what=which parts

When you get you r paper back, pay special attention to (pay attention to 是谓语,后面接的是一个宾语从句)( what) have been marked(What 可以引导一个名词性从句,这里作宾语,以为,做了标注的地方。而which放这里的话是个定语从句,必须在前面要有个先行词。)
谢谢~~~....

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When you get you r paper back, pay special attention to (pay attention to 是谓语,后面接的是一个宾语从句)( what) have been marked(What 可以引导一个名词性从句,这里作宾语,以为,做了标注的地方。而which放这里的话是个定语从句,必须在前面要有个先行词。)
谢谢~~~.

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指paper 用which不好