主语从句 (Subject Clause) ：在句子中充当主语的就是 主语从句。
他通过了考试让老师很高兴。 He passed the exam. It made the teacher happy. He passed the exam made the teacher happy. That he passed the exam made the teacher happy.
1.引导词： 从属连词 that, whether； 连接代词 who, what, which； whoever, whatever, whichever; 连接副词 when, where, how和why。 2. 语序：陈述句语序
That he will win the match is certain.
It is certain that he will win the match.
注解：一般来说主语从句都是放在 , 但有时为了使句子 ,避免”头重脚轻”, 常用 作 ，从而把主语从句放在 ．
这样就构成了下面一些常用句型: 1) It is + n. +that It is a pity/shame that... 可惜的是…… It is a surprise that… 令人吃惊的是… It is a fact that… 事实是… It is common knowledge that … …是常识 *_______________(很可惜)we lost the match. *______________(这是事实)he cheated in the exam.
1. 令人吃惊的是他改变了主意。 It is a surprise that he changed his mind. 2. 真可惜你错过了这么一个好机会。 It is a pity that you missed such a good chance. 3. 事实是我们周围的污染正变得越来越严重。 It is a fact that the pollution around us is becoming more and more serious.