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什么是同位语从句?

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什么是同位语从句?
一、在复合句中用作同位语的从句叫同位语从句.它一般跟在某些名词后面,用以说明该名词表示的具体内容.如:
I heard the news that our team had won.我听到了我们队获胜的消息.
I had no idea that you were here.我不知道你在这里.
二、可以跟同位语从句的名词通常有new,idea,fact,promise,question,doubt,thought,hope,message,suggestion,word(消息),possibility等.如:
I’ve come from Mr wang with a message that he won’t be able to see you this afternoon. 我从王先生那里来,他让我告诉你他今天下午不能来看你了.
三、英语中引导同位语从句的词通有连词 that,whether,连接副词 how,when,where等.(注:if,which 不能引导同位语从句.)如:
He must answer the question whether he agrees to if or not.
他必须回答他是否同意这样一个问题.
四、有时同位语从句可以不紧跟在说明的名词后面,而被别的词隔开.如:
Several years later,word came that Napoleon himself was coming to inspect them.
几年以后,有消息传来说拿破仑要亲自视 察他们.
The thought came to him that maybe the enemy had fled the city.
他突然想起可能敌人已经逃出城了.
五、同位语从匈与定语从句的区别.
1、同位语从句与前面的名词是同位关系,即说明它前面名词的内容;而定语从句与前面的名词是修饰与被修饰关系,即限定它前面的名词范围,或补充一些情况.如:
The news that l hove passed the exam is true.我通过了考试这一消息是真的.
(同位语从句,即从句所表达的意思就是前面名词的内容.)
The news that he told me just now is true.他刚才告诉我的消息是真的.
(定语从句,从句对前面名词起修饰限制作用,即“他告诉我的”那个消息,而不是别的消息.)
2、引导同位语从句的that是连词,在从句中不充当任何成份,而引导定语从句的that是关系代词,除起连接作用外,还在从句中充当主语、宾语或表语等.如:
The idea that computers can recognize human voices surprises many people.
计算机能够识别人的声音的想法使许多人感到惊奇.(that在从句中不充当任何成份.)