(4)as if引导表语从句。

It seems as if he has seen the man before.

看起来他以前见过这个人。

(5)主语是reason时，常用that而不用because引导表语从句。

The reason why he was late was that he had his bike broken.他迟到的原因是他的自行车坏了。

(6)如果主句的主语是idea，advice，suggestion，order，request，requirement等名词时，表语从句的谓语动词要用虚拟语气，即"(should＋)动词原形"。

My suggestion is that we (should) inform their parents about this.

我的建议就是把这件事情通知他们的父母。

[题组训练3]

单句语法填空

(1)The fact is we have lost the game.

(2)This is our problem lies.

(3)Raw material is we are badly in need of.

(4)The reason why I don't believe him is he often tells a lie.

(5)He had seen the film before.That is he did not see it last night.

(6)His suggestion is that we (hold) another meeting to discuss the problem.

4.同位语从句

在复合句中作同位语的从句称为同位语从句，该类从句进一步解释对应名词的内容。常见的接同位语从句的名词有：idea，fact，news，belief，hope，information，evidence，opinion，problem，truth，answer，proposal，theory，decision，discovery，thought，certainty，condition等。

(1)由连词that引导同位语从句，that不作成分，陈述中心词的内容。

The news that he has adjusted himself to the diet in Hunan has made his parents glad.

他习惯了湖南饮食的消息使得他的父母很高兴。

(2)可由whether，when，how，why，who，which，what等引导同位语从句，以示疑问。

We'll discuss the problem whether we will get up at 6：30 or at 5：00.

我们将讨论我们是在6：30还是在5：00起床的问题。

I have no idea when they will discuss the theory.

我不知道他们将什么时候讨论这个理论。

I have no impression how he entered the hall.

他是怎样进入大厅的，我没有印象。

The question why the weather is becoming drier and drier hasn't been answered.

为什么天气变得越来越干燥还没有得到回答。

The problem who should do the work requires consideration.