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1、名词性从句专项复习主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词因此，这四种从句通称为名词性从句。引导名词性从句的连接词可分为三类：连接词that ，whether, if （不充当从句的任何成分） 连接代词： what, whatever, who, whoever, whom, whose, which, 连接副词： when,where, how, why, wh- ever名词性从句连接词的选用一、 that 和 what 的选用：that 和 what 都可引导所有的名词从句。但是，what 除起连接作用外，还在名词性从句中充当成分，可做从句的主语、
2、宾语、或表语。而that 在名词性从句中不充当任何成分，只起连接作用。二、 if 和 whether 的选用不能使用 if 的情况：a. 主语从句句首b. 表语从句，同位语从句c. if 引起歧义d. 介词后的宾语从句e. 与 to do 连用f .whether or not连在一起引导宾语从句时不用if三、其它连接代词和副词的连用主要根据名词性从句中的具体意义,正确的选择 who 、 which 、 when 、 where 、why 、how 等连接词，这些连接词既具有疑问含义，又起连接作用，同时在从句中充当各种成分。四、引导词 that 的省略that 可省略的情况：单个宾语从句中的t
3、hat 可省略that 不可省略的情况： a.主语从句b.表语从句c.同位语从句d. 用 it 做形式宾语的宾语从句e.并列的宾语从句中，后几个从句的引导词that 不能省略五、同位语从句的引导和辨别1.同位语从句的格式：n.+ 连接词 + 从句2.能接同位语从句的名词有：fact 、 idea, news, information, order, belief, suggestion, advice 等.3.连接词通常是 that, 也可根据含义选用whether, what, when, where等来引导同位语从句.4.中心词是“ 意见、建议、命令” 从句要用虚拟（should ） do
4、六、同位语从句和定语从句的区别1.定语从句是先行词的修饰语。从句中that 充当成分，做宾语时可省略。2.同位语从句表明中心词的具体内容。that 在同位语从句中不做任何成分,只起连接作用 ,无具体含义 ,且不可省略 .判断从句类型七、宾语从句的时态呼应1. 如果主句时态是现在时或将来时,从句谓语可根据句意需要而选用任一种时态.2. 如果主句时态是过去式，从句要改成相应的过去式八、 it 做形式主语常用句型如下：（ 1） It + be + 名词 + that 从句（ 2） It + be + 形容词 + that 从句（ 3）It + be + 动词的过去分词+ that 从句（ 4） It
5、 + 不及物动词+ that 从句 名词性从句专项练习班级：姓名：评分：一、用 that 或 what 填空1._ he wants is a book.2. _ he wants to go there is obvious. 3.The result is _ we won the game. 4.This is _ we want to know.5.Is _ he told us true ?6.We should pay attention to _ the teacher is saying.7. I have no doubt _ he will come.8. I have n
6、o idea _ he did that afternoon.9._ has made China_ it is now?10.we can t get seems better thanwe have .11.A computer can only doyou instructed it to do .12.He became so angryhe couldnt speak .13.There is the citywe visited last year .14.There is no doubtthe price of cars will go down .15.None of us
7、has a clear ideathe others want to do .16.Dohe or she tells you to do .17.he did surprised us .18.he did so surprised us .19.This is allI know.20.This isI know.二、用 if 或 whether 填空1. I asked her _ she had a bike.2._ we will hold a party in the open air tomorrow depends on the weather.3. We re worried
8、 bouta_ he is safe.4. I don t know _ he is well or not.5. I don t know _ or not he is well.6. The question is _ he should do it.7.The doctor can hardly answer the question_ the old man will recover soon.8. I don t wkno_ to go.9._ you are not free tomorrow, Ill go without you.10.It depends onshe will
9、 come.11.I have no ideahe will be back .12.We must stick to our promiseor no .13.It is valuable ,I cant say .14.I don t knowhe is lying or not.15. I didn t knowto go home or stay at home.三、用适当的连词填空：1. _ _ you don t like him is none of my business. 2. _ we ll go camping depends on _ it will be fine t
10、omorrow.3. _ she comes or not makes no difference.4. The question is _ it is worth doing.5. There is some doubt _he will come./ There is no doubt _he will come.6. _ is a fact that English is being accepted as an international language.7. _ has helped to save the drowning girl is worth praising.8. It
11、 is said that the famous football star is not willing to play for _ would pay himthree million dollars a year.9. It was about 600 years ago _ the first clock with a face and an hour hand wasmade.10. Go and get your coat. It s _ you left it.11. You are saying that everyone should be equal, and this i
12、s _ I disagree.12. - I drove to Zhuhai for the air show last week.- Is that _ you had a few days off?13. I remember _ this used to be a quiet village.14. -Do you remember_ he came?- Yes, I do, he came by car.15. It is generally considered unwise to give a child _ he or she wants16. _we can t get com
13、es better than _ we have.17. A computer can only do _ you have instructed it to do.18. It is pretty well understood _ controls the flow of carbondioxide in and out theatmosphere today.19. A modern city has been set up in _ was a wasteland ten years ago.20. Do you have any idea _ is actually going on in the classroom?21. See the flags on the building? That was_ we did this morning.
