3、It + 及物动词 + 宾语 + that从句:
It worried her a bit that her hair was turning grey.
It shocked me that Peter didnt tell anybody where he was.
4、It + be + 过去分词 + that从句:
It is said that he has been there many times.
5、It + seem/happen/appear等不及物动词 + that从句:
It seems that he has lost something.
注意:
在上述第1和第2两种句型中,that从句前置与使用先行it,that从句后置在意义上没有什么差异;但使用先行it结构较为常见。
在第3种句型中,that从句前置在语法上是可能的,但实际上并不常见,通常总是使用先行it结构 .
第4种句型实质上是被动结构,由于that从句不可以位于句首作被动句的主语,所以只能使用先行it结构。
第5种句型已经形成了固定的搭配关系,that从句不能前置,只能使用先行it结构,不过,这种结构可以转换为带有不定式的简单句,例如:
It happened that I had no money with me that day.
I happened to have no money with me that day.
第二类,用连接代词who、whose、which、what,连接副词when、where、how、why,以及连词whether(或if)引导的主语从句,例如:
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