1、高三英语语法讲解及练习题名词性从句重难点分析名词性从句是历年高考的重点和难点，也是热点。名词性从句相当于名词，可作主句的主语、宾语、表语和同位语。因此，名词性从句可分为主语从句、表语从句、宾语从句和同位语从句（见下表）。主语从句作主语，用that, whether, if, what(=the thing that)等连接词引导。宾语从句作宾语，用that（可省略）, whether（or not）, if, what(=the thing which)等连接词引导。表语从句用that（一般不省略）, whether, what(=the thing which)等连接词引导。同位语从句用th
2、at（常用在news, thought, idea, plan, suggestion, fact等词后），whether等连接词引导。一、主语从句主语从句是在复合句中充当主语的从句，通常放在主语谓语动词之前或由形式主语it代替，而本身放在句子末尾。如：Who will go is not important. 谁将去不是重要的。1. it作形式主语和it引导强调句的比较it作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子每一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人时也可用who/whom。如：It is a
3、pity that you didnt go to see the film. (主语从句) 你没去看电影真是遗憾。It is in the morning that the murder took place. （强调句）谋杀案发生的时间是在早晨。2. 用it作形式主语的结构句型例句1It is+名词+主语从句It is a fact that事实是/ It is an honor that非常荣幸/ It is common knowledge that 是常识2It is+形容词+主语从句It is natural that很自然/ It is strange that 奇怪的是 （此句
4、型后面常接虚拟语气should+动词原形）3It+不及物动词+主语从句It seems that似乎/ It happened that碰巧/ It appears that似乎4It is/has been+过去分词+主语从句It is reported that据报道/ It has been proved that据证实/ It is said that据说/ It is believed that 据认为/一般人都认为2. 主语从句不可位于句首的五种情况说明例句1if引导的主语从句不可位于复合句句首Whether he will come or not in unknown. (正)I
5、f he will come or not is unknown. (误)2It is said/reported结构中的主语从句不可提前It is said that Jiang will visit our school next week. (正)Jiang will visit our school next week is said. (误)3It happens/occurs结构中的主语从句不可提前It occurred to him that he failed in the examination. (正)That he failed in the examination oc
6、curred to him. (误)4It doesnt matter how/whether结构中的主语从句不可提前It doesnt matter whether he is wrong or not. (正)Whether he is wrong or not doesnt matter. (误)5含主语从句的复合句是疑问句时，主语从句不可提前Isnt likely that it will rain in the evening? (正)Is that it will rain in the evening likely? (误)二、宾语从句宾语从句是在复合句中作宾语的名词性从句，通常
7、放在主句谓语动词（及物动词）或介词之后。说明例句1作动词的宾语由that引导的宾语从句（that通常可以省略）I heard (that) he joined the army. 我听说他参军了。由what, whether/if, when,where等引导的宾语从句She did not know what had happened. 她不知道发生了什么。动词+间接宾语+宾语从句She told me that she would accept my invitation. 她告诉我她将接受我的邀请。2作介词的宾语Our success depends on/upon how well w
8、e can cooperate with one another. 我们的成功取决于我们互相合作得有多好。3作形容词的宾语I am afraid (that) I have made a mistake. 恐怕我犯了个错。4It可以作为形式宾语We heard it that she would get married next month. 我们听说她下个月打算结婚。5否定前移（若主句谓语动词为think, consider, suppose, believe, expect, fancy, guess, imagine等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓
9、语用肯定式）。I dont think this dress fits you well. 我认为这件衣服不适合你穿。注意：that引导的从句常跟在某些形容词后作宾语，如：anxious, aware, certain, confident, convinced, determined, gald, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, satisfied, content等。也可将此类词后的从句看作是原因状语从句。三、表语从句表语从句是在复合句中作表语的名词性从
10、句，放在系动词之后，一般结构是“主语+连系动词+表语从句”。可以接表语从句的连系动词有be, look, remain, seem等。引导表语从句的引导词that一般不省略。另外，常用的含有表语从句的结构还有“The reason is that”，“It is because”，“Thats why”等。如：The reason he is late for school is that he missed the early bus. 他上学迟到的原因是他错过了早班车。四、同位语从句同位语从句是在复合句中作名词的同位语的名词性从句。说明例句1同位语的功能(一般由that引导)对于名词进一步
11、解释The kings decision that the prisoner would be set free surprised all the people. 国王做出释放那个罪犯的决定让所有人都很吃惊。说明名词的具体内容The order that all the soldiers should stay still is given by the general. 所有的士兵都应该保持不动，这个命令是将军下的。2同位语从句在句子中的位置有时可以不紧跟在它所说明的名词后面，被别的词隔开He got the news from Mary that the sports meeting w
12、as put off. 他从玛丽那里得到消息运动会被推迟了。五、whether, if引导名词性从句的区别说明例句1句首引导主语从句只能用whetherWhether we will go camping tomorrow depends on the weather. 我们明天是否去野营取决于天气。2if不能引导表语从句What the doctor really doubt is whether my mother will recover from the serious disease soon. 医生真正怀疑的是我的母亲是否会很快从重病中恢复。3if不能引导介词后的宾语从句Every
13、thing depends on whether we can make a plan that they will agree to. 一切取决于我们能否做出一个他们会同意的计划。4宾语从句是否定句只能用ifI asked Peter if he hadnt decided what he would say at the meeting. 我问皮特他是不是还没决定会议上他讲的内容。5discuss后的宾语从句只能用whether引导We discussed whether the medicine will cause side effects. 我们讨论了这个药是否会引起副作用。注意：d
14、oubt作“怀疑”解，后接宾语从句时，如主句是肯定的，宾语从句用whether或if引导，如主句是否定，宾语从句只能用that引导。如：I doubt whether/if he is fit for the job. 我怀疑他是否胜任这份工作。I dont doubt that he can do it very well. 他能把它做好，我不怀疑。考点练透一、单句填空 用适当的连词填空，补全下列句子。1. I cant decide dictionary I would buy.2. Thats he refused my invitation.3. I am very intereste
15、d in he has improved his pronunciation in such a short time.4. we need is more time.5. The fact she had not said anything at the meeting surprised everybody.6. and they will meet has not been decided yet.7. Please tell me you are waiting for.8. Is that you are looking for?9. Would you please tell me
16、 the nearest post office is?10. I dont know he will agree to the plan or not.11. is done cannt be undone.12. Take care you dont make mistakes in the coming exam.13. To his surprise, the umbrella was not he had put.14. we cant get seems better than we have.15. he is willing to come is not important.1
17、6. they are most interested in is they can produce more and better cars.17. It doesnt matter I rest or not.18. I have will be yours sooner or later.19. I think it is you are eating too much.20. Can you make sure Alice has put the gold necklace?21. Do you remember he came?Yes, I do. He came by train.
18、22. Mother asked me was wrong with me.23. they have won the game made us excited.24. he says in his report is a very interesting question.25. That is he failed to arrive on time.二、语篇填空 根据短文意思用适当的词填空。I dont know 1 you have noticed 2 some students dont want to walk to school. It can be seen every day
19、3 their parents drive them to school. But nowadays, it should be brought to our notice 4 the air is seriously polluted. 5 can we do about it? Here I have a suggestion 6 we should ride on our bike to school! 7 we can do it will not only have significant benefits for our health, 8 also help improve ou
20、r environment. 9 we will have a better environment depends on 10 we can do for ourselves and for nature. 三、语法填空 阅读下面短文, 在空白处填入一个适当的单词或括号内单词的正确形式。Keeping complaining can be a hurt in interpersonal relationships. So, 1 (improve) relationship with others, you need to be aware of several sensible ways t
21、o complain. To begin with, you need to be specific. Dont say, “Boy, did you act like 2 fool at the party?” Instead, say, “You embarrassed me by getting drunk and telling 3 (offend) jokes to my parents.” Secondly, stick to the present. Dont mention old offences 4 are from last month or last year. 5 d
22、oing this, you take away attention from the problem at hand. Moreover, 6 you complain, never add insults. If you start calling the other person names, that only 7 (create) anger and hurt any chance of getting the person to really listen to 8 . A last point to remember is to complain privately. Never
23、 criticize the other person in front of friends, parents, children, or anyone else for that matter. Criticizing in front of a third party has the same effect as insults. This shames the person 9 (criticize) and makes 10 very likely that the person will want to attack you orally rather than listen to
24、 you.助读词汇sensible adj. 明智的 specific adj. 具体的offence n. 冒犯 insult n. 侮辱privately adv. 私下地 shame vt. 使丢脸orally adv. 口头上 interpersonal relationship 人际关系参考答案考点练透一、单句填空1. which 2. why 3. how 4. What 5. that 6. When; where 7. whom(m) 8. what 9. where 10. whether 11. What 12. that 13. where 14. What; what
25、15. Whether 16. What; how 17. whether 18. Whatever 19. because 20. where 21. how 22. what 23. That 24. What 25. why二、语篇填空1. whether 2. that 3. that 4. that 5. What 6. that 7. That 8. but 9. Whether 10. what三、语法填空一直抱怨对人际关系是一种损害。对此，本文作者告诉我们如何明智地进行抱怨。1. to improve 作目的状语用动词不定式。2. a 不定冠词的基本用法，a在此意为“一个(笨蛋
26、)”。3. offensive 形容词修饰名词。offensive意为“攻击性的、冒犯性的”。4. which 此处which引导定语从句，修饰先行词old offences，并在从句中作主语。5. By 分析句子成分可知， 5 doing this在句中不作主语、宾语或表语，故填介词。根据上下语境，此处理应是表“通过这么做，你就可以”，故填介词By最合适。注意首字母要大写。6. when 空后是两个分句，填连接词。根据上下语境和句意可知，此处理应是个时间状语从句，故填when。7. will create 常用句型If sb, sb. will 。8. you 缺少介词宾语填代词，根据上下语境和前面的主语you可知此处填宾语you。9. being criticized 分析句子成分可知，动词criticize在此作非谓语动词。而criticize与逻辑主语the person却存在被动关系，故考虑现在分词形式。但根据上下语境和句意可知，此处理应是指“这会使那个正在被批评的人非常丢脸”才对，故填being criticized作后置定语为最佳答案。此题较难。10. it 此处it作形式宾语，真正的宾语是后面的that从句。
