宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词（及物动词）或介词之后。 1. 作动词的宾语
(1) 由that引导的宾语从句（that 通常可以省略）,例如： I heard that he joined the army.
由whether (if) 引导的宾语从句，例如：I wonder whether you can change this note for me.
(2)由who, what, which,引导的宾语从句She did not know what had happened. (3)由when, where, how, why引导的宾语从句
2. 作介词的宾语 例如：Our success depends upon how well we can cooperate with one another.
3. 作形容词的宾语 例如：I am afraid (that) I’ve made a mistake. That 引导的从句常跟在下列形容词后作宾语： anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content 等。也可以将此类词后的that 从句的看作原因状语从句。
4. It 可以作为形式宾语 It 不仅可以作为形式主语，还可以作为形式宾语，而真正的宾语that 从句则放在句尾，特别是在带复合宾语的句子中。 例如： We heard it that she would get married next month.
表语从句：
用作表语的从句叫做表语从句。
引导表语从句的连词有…as if , as though. The trouble is that I have lost his address .
The question is whether they will be able to help us .
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The problem is who we can get to replace her .
That was what she did this morning on reaching the attic . The question is how he did it .
从属连词if一般不用来引导表语从句，但as if 却可引表语从句，如It looks as if it’s going to rain.
All this was over twenty years ago ，but it’s as if it was only yesterday . 同位语从句
同位语从句在主从复合句中作某一名词的同位语,也就是说同位语从句说明被修饰名词的具体内容。
1.这些名词有,如:hope, plan, fact, news, problem, truth, idea, information等,此时同位语从句具体介绍这些名词的内容。 2. 引导同位语从句的从属连词：
The fact that he will come is surprising.他要来的事实出乎人们的意料。 The teacher gave the order that the students should hand in their homework at once.
Will they discuss the problem whether the sports meet will be put off this afternoon? 他们今天下午将讨论运动会是否推迟举行的问题吗?
Do you agree his idea when we will leave?/ how we will get there?/how we should do it.
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