新概念英语第二册语法精解：名词性从句之主语从句_新概念英语第二册

⑤It isn't surprising (that) he should have married her.

如果以that从句为主语的句子是疑问句，就只能用先行词it结构。例如：

①Is it certain that he will come?

②Is it true that he would take the risk?

it做形式主语有以下几种不同的结构：

(1)It + be + 形容词+ that-从句

①It is likely that he will come.

②It is strange that she has ever trusted him.

③It is important that he (should) attend the meeting.

④It is best that he (should) go.

此句型在表示惊讶、喜悦、遗憾等感情色彩时，that从句中的谓语动词也常用 (should) + v原形。

It is strange that no one should have objected to the plan.

(2)It + be +名词+ that-从句

It is common knowledge that the whale is not a fish.

It's a pity that he should have catched the train.

(3) It + be + -ed分词 + that从句

It is said that he is a famous writer.

It is reported that there will be a storm this afternoon.

在表示建议、要求、命令等意义的被动结构中，that从句中的谓语动词常用(should) do。(参见虚拟语气部分)

It is suggested that the meeting (should) be held this afternoon.

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新概念英语第二册 最新: 请求允许
2016-09-20; 劝告和建议
2016-09-20; 新概念英语第二册语法汇总：过去完成进行时
2016-06-20; 新概念英语第二册语法汇总：将来完成时
2016-06-20; 新概念英语第二册语法汇总：名词
2016-06-20; 新概念英语第二册语法汇总：被动语态
2016-06-20

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