Question

高考英语：Her relatives are all here and his___come yet. ___seems to have been no need to wait.

正确答案第一空为haven't，第二空为There。

问下第二空为什么填There？ 为什么不能是It ？

Answer 1

问题提得好！

第一句之所以要用haven't，是因为his后面省了relatives（复数），是比较刁钻的题。

第二句应该是很容易的。为便于理解，可将该句简化成there was no need to wait，指过去的等待，而不是今后。如果说It was no need to wait，当然就不行了。如在seem前坚持要用It，只能在当中加主语，将句子改成从句：It seems we had no need to wait.

既然不加主语，当然就只能保持there is no need这种句型。

但加了seems之后，原来过去时的was就只能改成不定式里的完成时to have been了。所以，就的写成There seems to have been no need to wait.

Answer 2

因为后句是seem to be，如果用It, 那么后句应该是从句，没有it seem to do的用法。
第一句用haven't 是的，这里his是名词性物主代词，＝his relatives.所以应该用复数

Answer 3

there 要与后面的been构成there be “有”句型的完成时态。 如要用it，则改为：It seems that there has been no need to wait.

Answer 4

It seems 接从句，人称代词做主语＋seem后才接不定式

Answer 5

实际 也可以用 it 来代替。 只是 口语每个人讲的 习惯问题