雅思考试中并没有很直接的考察语法，但是却在字里行间隐藏着对语法的考察。学会语法，就会发现自己组织语言、写作逻辑、阅读能力都在不知不觉中提升很多。希望这篇英语语法之名词性从句的用法分享可以让大家对名词性从句更加了解。
二、 宾语从句
在谓语动词、介词、动词不定式、分词、动名词之后都可以带有宾语从句。某些形容词如sure, happy, glad, certain, pleased 等之后也可以带有宾语从句。
1. that 引导的宾语从句: that 没有意义，在口语或非正式文体中常省略
例如：
I really feel she's making a mistake. 我的确感到她正犯错误。
James said (that) he was feeling better. 詹姆斯说他感到好些了。
Hearing that his son was badly wounded, he hurried to the hospital to see him.听说儿子受了重伤，他急忙赶到医院去看望他。
I suggested that we should go home. 我建议我们回家去。虚拟语气，that 一般不能省略。
2.whether/if (是否)引导的宾语从句：如果要突出“究竟是…还是不…”，常在whether 后面加or not; if 一般不与or not连用。如：
He asked me if/whether I knew John. 他问我是否认识约翰。
Let me know whether you can come or not. 你能来还是不能来，告诉我一声。
3.在think, believe, suppose, expect 等动词的宾语从句中，否定不用在从句中，而是将think 等词变为否定形式。For example:
I don't think the film is interesting.我觉得这部电影没什么意思。
I don't suppose we are going outing tomorrow. 我认为我们明天不会出去郊游。
4.如果从句作宾语而后面还有补语，为了保持句子的平衡，用it 作形式宾语，而将宾语从句放在句尾。常跟这样的复合宾语的动词有：make, find, see, hear, feel, think, consider, regard, take….for granted等。如：
George made it clear that he opposed this project. 乔治已明确表示他反对这个项目。it 代表that 引导的句子，作宾语，clear 是宾语补足语。
They kept it quiet that he was dead. 对他已经死亡的消息，他们秘而不宣。
I took it for granted that you'd stay with us. 我想当然认为你会和我们呆在一起。
三、 同位语从句
同位语从句是对名词的内容给予具体、详细的说明。常在后面接同位语从句的名词有fact, news, idea, truth, hope, suggestion, question, problem, doubt, fear, belief等。同位语从句常用的引导词为that,有是也用when, where 等疑问词。
如：
The news that the United States was hit by terrorist attacks took the whole world by surprise. 美国受到KB主义分子袭击的消息令全世界吃惊。
The idea that you can do this work well without thinking is quite wrong.你认为不动脑筋就能做好这件工作的想法是完全错误的。
People used to hold the belief that the earth was the center of the universe. 人们曾认为地球是宇宙的中心。
The difficulty lies in the fact that we are short of money.困难在于我们缺乏资金这个事实。
They have no idea at all where he has gone.他们一点儿也不知道他去哪儿了。
注意：同位语从句的that 只是引导词，没有其他语法作用，在句子中不作句子成分，不能省略;而定语从句中的that 除了引导定语从句外，还是定语从句的一个成分，在定语从句中作主语或宾语，作主语时不能省略，作宾语时可以省略。
如：
The idea that some peoples are superior to others is sheer nonsense.有些民族优越于其他民族这种想法简直荒谬。(请辨别是同位语从句还是定语从句。)(同位语从句)
The idea that he proposed at the meeting is sheer nonsense. 他在会议上提出的这个想法简直荒谬。(请辨别是同位语从句还是定语从句。)(定语从句)
No one is happy with the fact that he found out. 没有人对他发现的事实感到高兴。(请辨别是同位语从句还是定语从句。)(定语从句)
No one is happy with the fact that he will become their boss.没有人对他将成为他们的老板这一事实感到高兴。(请辨别是同位语从句还是定语从句。)(同位语从句)
四、表语从句
表语从句位于主句的连系动词之后，在非正式文体中引导词that可以省略。如：
That's not what I want. 那不是我要的。
That's why I have come.那就是我为什么来了。
My opinion is that things will improve.我的意见是事情会好起来的。
One advantage of solar energy is that it will never run out. 太阳能的一个优点是永远也不会枯竭。
The truth is that he didn't really try. 实际情况是他没有真正努力。
The problem is who is to pay and when we can start.问题是谁来付帐、我们又何时开始。
The fact is that he didn't notice the car until too late. 事实是他注意到车时已经太晚了。
What surprised me was that he spoke English so well.使我感到吃惊的是他英语讲得那么好。
All I can say is that I have nothing to do with it. 我能说的就是我与此事没有关系。
What I want to know is where we shall go and whether she will join us. 我想知道的是我们要去什么地方以及她是否加入我们。
此外，表语从句还可由as if (好像)引导。如：
It looked as if it was/were going to rain. (虚拟语气)
Now let's do some translation:
这就是她昨天请一天假的原因。
That is why she had a day off yesterday.
我的想法是，个人的权利应该得到充分尊重。
My idea is that individual rights should be fully respected.
问题在于上帝是否真的存在。
The question is whether the God really exists.
我想知道的是，他是如何在这么短的时间内完成这个项目的。
What I want to know is how he managed to complete the project in such a short time.
五、形容词后的that 从句
that 引导的名词性从句还可以用在一些形容词后面。这种句型一般都用人作主语，所用的形容词都是表示思想状况或感情色彩的形容词，如certain, sure, positive, afraid, convinced, anxious, disappointed, worried, glad, happy, sorry, amazed, surprised, aware, doubtful, confident等等。
如：
I am sure/certain that he's at home now.我肯定他现在在家。
He became angry that you made the same mistake. 你犯了同样的错误，他生气了。
He remains confident that he will win. 他仍然自信他会赢
She is aware that I can't help her. 她知道我帮不了她的忙。
I am glad that you've come. 你来了我很高兴。
He appeared/seemed surprised that I said “no”. 我说不，他似乎很吃惊。
I am afraid that I can't promise you anything. 恐怕我不能向你保证什么。
We were rather disappointed that you were not able to come yesterday. 昨天你没能来我们有点失望。
I am a bit worried that she will not be able to make it. 我有点担心她做不成这件事情。
上面就是对英语名词性从句几种常见从句的讲解，希望大家可以掌握并灵活运用，更多备考经验请持续关注前程百利雅思频道。最后，小编祝大家拿到满意的雅思成绩。
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