This question is too difficult for me to answer.为什么后面不要it呢?
问题描述：
This question is too difficult for me to answer.为什么后面不要it呢?
答
This question is too difficult for me to answer.
因为answer 的宾语this question已前置！
答
it代指the question 并提前
答
too...to句型to后根动词to do sth
答
因为如果是
It is difficult for sb. to do sth.
这个时候需要把sth.加出来，因为it做形式主语，后面真正的主语是某人做某事有困难
而这句，前面不是形式主语It，而是question，说明answer已经有了宾语，就是question，不许要再加上宾语it了
答
因为this question 是answer的逻辑宾语,故不再用it.也可以这样说：It is too difficult for me to answer this queston.