同位语从句讲解与练习1定义:用作同位语的从句叫做同位语从句，用以解释说明某一名词内容与实质的从句。
2•连接词：that, whether, why, who, where, how, when等。
引导同位语从句时一般都不省略。
if 一般不引导同位语从句that, whether不作成分,whether表示"就是否”E、g、They were all very much worried over the fact that you were sick 、对您生病这件事，她们很焦虑。
Where did you get the idea that I could not come?您在哪儿听说我不能来？I have no idea whether he' ll come or not、我不知道她就是否来。
连接代词who, which, what与连接副词where,when, why, how亦可引导同位语从句，在句中作成分。
E、g、The question who should do the work requires consideration 、谁该干这项工作，这个问题需要考虑。
We haven' t yet settled the question where we are going to spend our summer vacation 、至U哪儿去度暑假，这个问题我们还没有决定。
It is a question how he did it、那就是一个她如何做了此事的问题。
3•可跟同位语从句的名词或短语不就是所有的名词都可以跟同位语从句，常可以被同位语从句修饰的名词有：belief doubt expla nati on hopeidea n ews opi nion possibilitystateme nt thought wish truthfact questio n promise problemreply report suggesti on advicefear warni ng un dersta nding feeli ngrumor certainty probability on con diti onon the un dersta with the excepti on in spite ofE、g、Daniel will be allowed to make a trip to China on condition that he gets an A in all his school subjects、4同位语从句与定语从句的区别1)that引导的同位语从句与定语从句之区别句法功能上that引导的同位语从句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。
that引导的定语从句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。
意义上同位语从句就是被修饰名词的内容。
定语从句起限定作用，就是定语。
如：The news that Mr、Li will be our new English teacher is true、(同位语从句,that 不可省)李先生将就是我们的新英语老师这个消息就是真的。
The news (that) he told me yesterday is true、(定语从句,that在从句中作的宾语，可省)她昨天告诉我的消息就是真的。
2)wh-类词引导的两种从句的区别who, whom, whose, when, where, why引导定语从句，它们分别指前面先行词所表示的人、物、时间、地点、原因，否则为同位语从句。
在同位语从句中,wh-类词表示疑问。
I will forever cherish the time when I won the prize in the National Maths Competition（定语从句）I have no idea when he won the prize in the National Maths Competition 、（同位语从句）、3）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should+ 动词原形表示。
should 可省。
如:This is our only request that this （should） be settled as soon as possible 、这就就是我们唯一的请求:尽快解决这个问题。
练习:用适当的连接词填空:It worried her a bit her hair was turning gray 、2、I have no idea _ we can do with these waste materials 、3、 _ the doctor really doubts is my mother will recover from the serious disease 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 ___ w e were w、rong10、It ' s generally considered unwise to givaechild he or she wants、B、单项选择It was true __ Alice did surprised her mother 、A、thatB、whatC、that, whatD、what, that2、Does ____ matter much __ he can ' t come to the m、eetingA、it, ifB、that, ifC、it, whetherD、this, whether3、--What are you anxious about?A、How can we succeedB、Whether we can succeedC、When can we succeedD、That we can succeedhard-working 、A、why, whyB、why, thatC、that, becauseD、for, because5、____ leaves the room last ought to turn off the lights 、A、WhoB、WhoeverC、AnyoneD、The person6、I really don ' t know ___ I had this photo t、aken4、The reason the little actress has been such a success is s he is both clever andA 、where it was thatB 、it was that C、where it was D 、it was why7、? Dr、Black comes from either Oxford or Cambridge I can ' t remember __、__A 、whereB 、there C、which D 、that8、--What do you think of China?-- __ different life is today from it used tobe 、A How, whatB What, whatC How, thatD 、What, that9、Give this to you think can do the work well 、A、whoB、whomC、whoeverD、whomever10、 ___ troubles me is _ I can t learn all these English idhieoamrts、byA 、That, thatB 、What, what C、That, what D 、What, that练习二1、The fact she works hard is well known to us all 、A、that B 、what C、why D 、which2、The fact he was successful proves his ability 、A、that B 、what C 、which D 、why3、The news __ he was kidnapped surprised us greatly 、A、what B 、that C、why D 、when4、His suggestion the meeting be delayed was turned down 、A、which B 、that C、/D、it5、I have no idea he will start 、A、when B 、that C、what D 、/6、I've come from the government with a message the meeting won't be held tomorrow 、A 、ifB 、that C、whether D 、which7、The thought he might fail in the exam worried him 、A、when B 、which C 、what D 、that8、The order the prisoner be set free arrived too late 、A、which B 、whether C 、that D 、what9、The nurses are trying their best to reduce the patient's fear he would die of the disease 、A、thatB、asC、of which D 、which10、He often asked me the question the work was worth doing 、A 、whetherB 、whereC 、thatD 、when 同位语从句答案A 、1、that 2、what 3、what, whether 4、that 5、who 6、why 7、that 8、which 9 、where 10、whateverB、1—5 CABBB 6—10 ACACD1-5 AABBA 6-10 BDCAA。