it用作形式主语特殊句式小归纳

it用作形式主语有不少非常有用的句式，比如以下一些就值得注意：

1. 用于it seems (appears) that…句式。如：

It seems that he knows everything. 他好像什么都知道。

It appears that we may be mistaken. 看来我们可能弄错了。

但是，英语一般不说it looks that…，可改用it looks as if…。如：

It looks as if we’ll be late. 我们似乎要迟到了。

2. 用于it happens (occurs) that…句式。如：

It happened that I was standing next to him when he collapsed. 他倒下的时候我恰巧站在他旁边。

It didn’t occur to him that she would refuse his invitation. 他没有想到她会拒绝他的邀请。

3. 用于it follows that…句式。如：

He is wrong, but it does not follow thatyou are right. 他错了，但并不能由此推断你是对的。

She’s not in the office but it doesn’t necessarily follow that she’s ill. 她不在办公室, 并不见得就是病了