It is a pity that such a thing ( should ) happen in your class.这种事竟然发生在你们班上，真是遗憾!

It is a pity that he is ill. 他生病了，真遗憾!

16. It doesn't matter whether ( if ) …

该句型中whether(if) 引导的从句是真正主语，该句型常译为　”不论(是否)…没关系…

It doesn't matter if they are old.

17. It is kind ( of sb. ) to do sth.

该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由 of引起，主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有：

bad , brave , careless, clever , cruel , foolish , good (好心的)， honest , horrible , kind , lazy , modest , naughty , nice(有教养的)， polite, rude , silly , stupid , wise , wrong(错误的)等。 这个句型可以改写为：sb. is kind to do sth.

It is kind of you to say so. = You are kind to say so.

18. It is necessary ( for sb. ) to do sth.

该句型与上一个同属一个句型。如果不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有：① important, necessary, natural ② easy , safe , common , normal , hard , difficult , dangerous , unusual, rare , impossible , pleasant等。

在①中的形容词作表语可以用从句改写， 如：

It is important for her to come to the party. = It is important that she (should ) come to the party

19. It looks ( seems ) as if …

该句型中it无意义。 as if 引导一个状语从句。常译为，“看起来好象…”如果与事实不相符合，则用虚拟语气。

It looks as if he is ill.(真的病了)

It looks as if he were ill. (没有生病)

It seemed as if he were dying.

20. We think it important to learn a foreign language.

该句型中的it 作形式宾语。为了记忆方便我们可称该句型为“6123结构”。6指主句中常用的动词：think, believe, make, find, consider, feel;1指的是形式宾语it; 2指的是宾补的两种形式：形容词或名词;3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。

We think it our duty to clean our classroom every day.

He felt it important learning English well.

They found it difficult that they would finish their work in two days.

【总结】2013年威廉希尔app 为小编在此为您收集了此文章“高中英语语法：It 所构成的句型详解”，今后还会发布更多更好的文章希望对大家有所帮助，祝您在威廉希尔app 学习愉快!

更多精彩内容请点击：高中 > 高中英语学习 > 英语语法