it最基本的用法

it最基本的用法内容摘要：

前或之后一定有修饰语 来加以区别。 I bought a dictionary three years ago and I am still using it now. I bought a dictionary three years ago but I am going to buy a new one soon. 形式主语 it： 有下面几种类型： be+形容词 +不定式 eg: It’s better to be early. be+名词 +不定式 eg: It was his duty to take care of the orphans. be+介词短语 +不定式 eg: It’s beyond me to say why. It + 及物动词 +宾语 +不定式 eg: It makes me sick to think about it. be+名词 +动名词 eg:It’s no good standing here in the cold. be + 形容词 +动名词 eg:It’s helpless trying to convince her. 其他结构 +动名词 eg:It doesn’t matter waiting a few more days. 用于由 that 引导的主语从句 ， 有下面几种类型： it +be+形容词 +that从句： eg: It is natural that they should have different views. it +be+名词 +that从句 : eg: It’s a shame that you’re sick. it +动词 （ +宾语 ） +that从句 eg: It happened that she wasn’t in that day. Eg2: It never occurred to me that perhaps she was lying. It+动词的被动语态 (said/believed/thought/expected/reported/ known+that从句 eg: It’s said that there has been an earthquake in India. 形式宾语 it: it 可以代表不定式： She found it difficult to convince him. He felt it his duty to take care of them. It 代表 that引导的从句： I took it for granted (that) you would be ing. It代表连接代 （ 副 ） 词引导的从句：。