同位语从句
1. The fact that she seemed to develop normally was very encouraging. 她（多莉羊）似乎生长正常的事实很鼓舞人心。
“that she seemed to develop normally”是一个同位语从句，作the fact的同位语。同位语从句一般由that引导，常放在fact，truth，news，information，idea，thought，hope，suggestion，advice，reply，remark，report等名词后面，说明该名词的具体内容。当先行词是problem，question或当主句是表示疑问或否定意思时，连接词要用whether或其他的疑问代词或副词。如：
1). The news that he has been elected president of the United States is true. 他当选美国总统的消息是真的。
2). The question whether we should continue to do the experiment has not been answered yet. 我们是否该继续实验的问题还没有被解决。
3). I have no idea where the new library will be built. 我不知道新图书馆将要建在哪。
【热点难点全析】
同位语的定义：同位语是句子成分的一种。它位于名词、代词后面 , 说明它们的性质和情况 , 它可以由名词、代词、名词性短语或从句充当。
同位语的表现形式有以下几种:
①名词
Tom, our monitor, is a handsome boy. 汤姆，我们班长，是个英俊的小伙子
②代词
I myself will do the experiment. 我将亲自做这项实验
③数词
She is the oldest among them six. 她是他们 6 人中年纪最大的
④从句
He told me the news that the plane had exploded. 他告诉我飞机爆炸的消息
⑤由 such as，that is 引导
Some , subjects, such as maths and physics, are very difficult to learn.
某些学科，例如数学和物理，是很难学的
⑥由 of 引导
The city of Beijing has been greatly changed since 2000. 自从 2000 年以来，北京市发生了很大的变化
⑦由 or 引导
The freezing temper，or freezing point, is the temperature at which water freezes under ordinary temperature结冰温度即冰点，是水在常压下结冰时的温度
引导同位语从句的词有连词 that, 连接副词 how, when, where, whether 等
【点拨】 同位语丛句与定语从句的区别
①同位语从句说明的名词大都是抽象名词；定语从句所修饰、限定的名词或代词有抽象的也有不抽象的
We express the hope that they will come to visit China again( 同位语从句 )
Those who want to go please sign their names here.( 定语从句 )
②同位语从句所说明的名词与从句没有逻辑关系；定语从句所限定的名词是从句逻辑上的主语、宾语、表语、定语、状语等
The news that they won the match is true-(同位语从句 ,news 和从句没有逻辑关系)
The news that you told us yesterday is true.(定语从句 ,news 是 told 的逻辑宾语）
The order when we should go back hasn't reached us.(同位语从句 ,order 和从句没有 逻辑关系)
The day when New China was founded will never be forgotten(定语从句 ,day 是 founded 的逻辑状语)
③同位语从句主要由连接词 that 引导，有时也可用 when, where, who, whether 等引导；定语从句由关系代词或关系副词引导
Then he raised the question where they were to get the machine needed.
Do you know the place where he was born?
④引异同位语从句的连词不可省略；引导定语从句的关系代词作宾语时常可省略
The news that he has been elected monitor of Our class is true.
The news (that)he to me is exciting.
⑤同位语从句与先行词一般可变成一个完整 it句子，谓语动词用 be 的不同形式
He heard the news that their team had won.
此句可以变为一个表语从句：
The news was that their team had won.
1. We should consider the students' request _____ the school library provide more books on popular science．
A．that B．when C．which D．where
2. The mere fact _____ most people believe nuclear war would be madness does not mean that it will not occur.
A. that B. what C. which D. why
3. The thought ____ they would go abroad for a visit was exciting.
A. when B. which C. where D. that
4．---All the building materials have been washed away.
---So I have heard. But there was no sign ______ a heavy rain was on the way last night.
A. when B. If C. which D. that
