表语从句
[观察例句]
1．One theory was that bad air caused the disease.
2．The question is who will be the successful applicant for the summer job at the law firm.
3．Her confusion is whether she should stick to her own way of life or follow the American way.
4．What John Snow was determined to find out was why the 1854 outbreak of cholera in London could have caused over 500 deaths within ten days.
5．Taking a year off from school to travel abroad is what is generally called a gap year.
[归纳用法]
1．所有例句中的黑体部分都位于系动词be后，作表语，故都是表语从句，这些表语从句在词性上相当于一个名词。
2．例1由从属连词that引导；例2由连接代词who引导；例3由从属连词whether引导；例4由连接副词why引导；例5由连接代词what引导。
表语从句放在连系动词之后，充当复合句中的表语。表语从句就是指一个句子作为表语，说明主语是什么或者怎么样。
一般结构为“主语＋系动词＋表语从句”。可接表语从句的连系动词有be，look，remain，seem等。
1．从属连词that引导的表语从句
从属连词that的用法：①无意义 ②不充当成分
③不可省略
The reason for his absence is that he hasn't been informed.
他缺席的原因是他没接到通知。
My suggestion is that we should tell him.
我的建议是我们应该告诉他。
2．从属连词whether引导的表语从句
The point is whether we should lend him the money.
关键在于我们是否应该借钱给他。
[名师点津] if不能引导表语从句。
3．连接代词和连接副词引导的表语从句
The problem is who is really fit for the hard job.
问题是谁才真正适合做这份艰苦的工作。
This is what I am interested in.
这就是我所感兴趣的。
That's where I first met her.
那就是我第一次遇见她的地方。
