同位语从句
一定义：
在复合句中用作同位语的从句称为同位语从句。 同位语从句一般由that, whether等连词引导，常放在fact, news, idea, truth, hope, problem, information，thought, question, reply, report, remark等名词的后面，说明该名词的具体内容。
如： They were all very much worried over the fact that you were sick.
Where did you get the idea that I could not come?
I have no idea whether he’ll come or not.
二 同位语从句的表现形式
1.由that 引导
The fact that you haven’t enough time to do the work is simply unbelievable.
The hope that he may recover is not gone yet.
The news that he has been elected president of the United States is true.
2.由whether 引导
The problem whether we should continue to do the experiment has been solved.
The question whether we need more time to do the work has not been discusd.
3.由when 引导
I have no idea when he will be back.
有时用namely(即)， that is to say， in other words, that is, i. e. (=that is), for example 等引出同位语，说明其前面的名词或代词。
He told us the good news, namely, the muum is open to all.
There is only one way of improving your English, that is ,to practice more.
注意： 同位语从句不同于定语从句，前者是对名词加以补充说明，后者对名词加以限制。试比较：
The news that they had won the game soon spread over the whole school. (同位语从句)
The news you told me yesterday was really disappointing. (定语从句)
定语从句和同位语从句的区别：
二者在使用中经常易混淆，但我们可以从以下几个方面具体来区分它们：
1.（1）一般来说，定语从句的先行词由名词或代词构成，同位语从句的先行词通常是抽象名词。
Tho who want to go plea sign their names here.
We express the hope that they will come to visit China again.
(2) 定语从句修饰、限定先行词的意义，与先行词为修饰关系；同位语从句说明先行词的具体内容，与先行词是同为关系。
The train that has just left is for Beijing.
The truth that the earth moves around the sun is known to all.
(3)定语从句由关系代词或关系副词引导；同位语从句主要由连接词that引导，有时也可用where, who, whether等引导。
Do you know the place where he was born?
Then he raid the question where they were to get the machine needed.
(4)引导定语从句的关系代词往往可以省略；引导同位语从句的连接词一般不能省略。
The news (that) he told me is exciting.
The news that he has been elected president of the United States is true.
(5)同位语从句与先行词一般可发展成一个完整句子，谓语动词用to be.
He heard the news that his team had won.
此句可以发展成一个表语从句：
The news was that his team had won.
2. that引导的同位语从句与定语从句之区别
A）． that引导的同位语从句和that引导的定语从句在句法功能上： that只起连接从句的作用，无意义。在从句中不充当句子成分，不可省。 在定语从句中，that替代先行词在从句中不仅起连接作用，还充当一个句子成分。如在从句中作动词的宾语时可省略。
B）意义上：that引导的同位语从句是被修饰名词的内容，在从句起限定作用，相当于定语
如： The news that Mr. Li will be our new English teacher is true. (同位语从句，that不可省)
The news (that) he told me yesterday is true. ( 定语从句，that在从句中作told的宾语，可省) 他昨天告诉我的消息是真的。
3．在一些表示“建议、命令、要求”的名词后所跟的同位语从句中，谓语动词用虚拟语气即
用：should+动词原形表示。should可省。
如：This is our only request that this (should) be ttled as soon as possible.
练习
A用适当的连接词填空：
1. It worried her bit _____ her hair was turning gray.
2. I have no idea _____ we can do with the waste materials.
3.____the doctor really doubts is ____my mother will recover from the rious dia soon. 4. It is hoped ____nature will never be destroyed.
5.____do you guess will give a talk on English tomorrow?
6. -- I drove to Zhuhai for the air show last week. -- Is that ____ you had a few days off?
7. Word came ____I was wanted at the office.
8. Do you know ____of them will be our new headmaster?
9.The teacher didn’t tell me ____we were wrong.
10. It’s generally considered unwi to give a child ____he or she wants.
B单项选择
1. It was true _____ Alice did surprid her mother.
A. that B. what C. that, what D. what, that
2. Does ____matter much ____he can’t come to the meeting.
A. it, if B. that, if C. it, whether D. this, whether
3.--What are you anxious about? -- ____
A. How can we succeed B. Whether we can succeed
C. When can we succeed D. That we can succeed
4.The reason ____the little actress has been such a success is ____she is both clever and hard-working.
A. why, why B. why, that C. that, becau D. for, becau
5. ____leaves the room last ought to turn off the lights.
A. Who B. Whoever C. Anyone D. The person
6. I really don’t know _____I had this photo taken.
A. where it was that B. it was that C. where it was D. it was why
7. Dr. Black comes from either Oxford or Cambridge. I can’t remember ____.
A. where B. there C. which D. that
8.--What do you think of China? --____different life is today from ____it ud to be.
