英语语法:名词性从句最详分析
My idea is that we should start making preparations right now. 我的意见是我们马上就开始做准备工作。
【连词that的省略问题】
引导表语从句的that通常不省略，但在口语或非正式文体中有时也可省略：
My idea is (that) we should do it right away. 我的意见是我们应该马上干。
The trouble is (that) he is ill. 糟糕的是他病了。
2. 由whether引导
The question is whether the film is worth seeing. 问题是这部电影是否值得看。
【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。
3. 由连接代词引导
You are not who I thought you were. 你已不是我过去所想像的人。
The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。
The question is who (m) we should trust. 问题是我们应当相信谁。
What I want to know is which road we should take. 我想知道的是我们应走哪条路。
4. 由连接副词引导
The problem is how we can find him. 问题是我们如何找到他。
That was when I was fifteen. 这是我15岁时发生的事。
That’s where I first met her. 那就是我第一次遇见她的地方。
That’s why he didn’t come. 这就是他没有来的缘故。
That’s why I object to the plan. 这就是我反对这个计划的原因。
That’s where you are wrong. 这就是你不对的地方。
5. 由关系代词型what引导
That’s what I want to stress. 这是我想强调的。
That’s what we are here for. 我们来这里就为了这个。
Fame and personal gain is what they’re after. 他们追求的是名利。
He is no longer what he was. 他已经不是以前的他了。
6. 由as if / as though引导
It isn’t as if you were going away for ever. 又不是你离开不回来了。
Now it was as though she had known Millie for years. 现在好像她认识米莉已有好多年了似的。
It is not as though we were poor. 又不是我们家里穷。
7. 由because引导
It is because I love you too much. 那是因为我太爱你了。
That’s because you can’t appreciate music. 这是因为你不能欣赏音乐。
If I’m a bit sleepy, it’s because I was upall night. 如果我有点困，是因为一夜没睡。
It's because I passed a slip of paper for John to Helen in class. 这是因为我在上课中替约翰传纸条给海伦。
【注意】because 可引导表语从句，但与之同义的since, as, for等也不用于引导表语从句。
四、同位语从句
同位语从句指的是在复合句中充当同位语的从句，属于名词性从句的范畴，同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和同位语在逻辑上是主表关系。
引导同位语从句的词语通常有连词that，whether，连接代词和连接副词等。
1. 由that引导
We heard the news that our team had won. 我们听到消息说我们队赢了。
They were worried over the fact that you were sick. 他们为你生病发愁。
The news that we are having a holiday tomorrow is not true. 明天放假的消息不实。
I’ve come to the conclusion that it was unwise to do that. 我得出结论这样做是不明智的。
The fact that the money has gone does not mean it was stolen. 那笔钱不见了这一事实并不意味着是被偷了。
He referred to Copernicus’ statement that the earth moves round the sun. 他提到了哥白尼关于地球绕太阳转的说法。
【注意1】 在某些名词(如demand, wish, suggestion, resolution等)后面的同位语从句要用虚拟语气。 如：
They were faced with the demand that this tax be abolished. 他们面对废除这个税的要求。
They expressed the wish that she accept the award. 他们表示希望她接受这笔奖金。
There was a suggestion that Brown should be dropped from the team. 有一项建议是布朗应该离队。
The suggestion that the new rule be adopted came from the chairman. 采纳新规则的建议是主席提出的。
The resolution that women be allowed to join the society was carried. 允许妇女参加这个协会的决议通过了。
I can understand their eagerness that you should be the main speaker. 我理解他们希望你作主要发言人的殷切心情。
【注意2】 引导同位语从句的连词that通常不省略，但在非正式文体中也可以省去。 如：
He gabbed his suitcase and gave the impression he was boarding the Tokyo plane. 他拿起了手提箱，给人的印象是他要登上飞往东京的飞机了。
2. 由whether引导
There is some doubt whether he will come. 他是否会来还不一定。
Answer my question whether you are coming. 你回答我的问题：你来不来。
The question whether it is right or wrong depends on the result. 这个是对还是错要看结果。
We are not investigating the question whether he is trustworthy. 我们不是在调查他是否可以信任的问题。
【注意】 whether 可引导同位语从句，但if不能引导同位语从句。
3. 由连接代词引导
Have you any idea what time it starts? 你知道什么时候开始吗?
From 1985-90 I was an instructor at the regional party headquarters. After that I went back to work in a factory. Then I had no idea what a casino was. 从1985年到1990年我是地方党部的教员。随后我回到一家工厂工作。当时我不知道赌场是什么样的地方。
4. 由连接副词引导
I have no idea when he will come back. 我不知道他什么时候回来。
It is a question how he did it. 那是一个他如何做的问题。
He had no idea why she left. 他不知道她为什么离开。
You have no idea how worried I was! 你不知道我多着急!
【关于分离同位语从句】
有时同位语从句可以和同位的名词分开。 如：
The story goes that he beats his wife. 传说他打老婆。
The news got about that he had won a car in the lottery. 消息传开说他中彩得了一辆汽车。
The rumour spread that a new school would be built here. 谣传这里要盖一所新学校。
Report has it that the Smiths are leaving town. 有传言说史密斯一家要离开这座城市。
The thought came to him that maybe the enemy had fled the city. 他想到可能敌人已逃离这座城市。
The order soon came that all citizens should evacuate the village. 不久命令下来，所有居民都必须撤出村子。