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1、精品资料欢迎下载2021 高三英语语法复习：名词性从句名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语；因此，名词性从句厅分为主语从句、表语从句、宾语从句和同位从句；（一）引导名词性从句的连接词1 、连 接代 词： who, whoever ,whose, whom, whomever, what, whatever, which, whichever；有词义，在从句中担任成分，如主语、表语、宾语、或定语等；2、连接副词： when, where, why, how；有词义，在从句中担任成分，作状语；3、连接词： that, whether, if, as if； that 无词义
2、，在从句中不担任成分，有时可省略； if whether, as if 虽有词义，但在从句中不担任成分；留意：连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式； 连接代词与连接副词在从句充当句子成分，连接词whether 和 if （是否）， as if （好象）在从句中不充当句子成分，只起连接作用；依据句义，假如连接代词与连接副词， whether、if和 as if 都用不上时，才用 that 作连接词（ that 本身无任何含义）；（二）主语从句1、主语从句在复合句作主语；e.g. Who will go is not important. 2、用 it 作形式主语，主语从
3、句放在句末；e.g. It doesn t matter so mucwhhether you will come or not.附：用形式主语 it 的主语从句常见结构：It is clear necessary, important, possible, emarkable that值得留意 很清晰（必要 , 重要,可能,It is a fact a good thing, good news that 事实是 好事是,好消息是 It is well-known reported, recorded, estimated, aid, believed that众所周知 据报道,据记载,据说
4、,据估量 Itturns out seems, happens, appears that 结果是 好像是 , 碰巧是 , 好象是 It has been found has been proved,can be seen,must be pointed out that已发觉 已证明,可以看出 ,需指出3、that 引导主语从句时，不能省略；e.g. That he suddenly fell ill last week made us surprised.（三）宾语从句1、宾语从句在复合句中作宾语；引导宾语从句的连词that 一般可省略；e.g. I hope that everythin
5、g is all right.2、whether 与 if 都可以引导宾语从句，常可互换；但下面情形不能互换；宾语从句中的 whether 与 or not 直接连用， 就不能换成 if ；不直接连用， 可换；e.g. I don t kwnohwether or not the report is true. I don t knowwhether/ if the report is true or not.介词后的宾语从句要用 whether 引导, whether 可与不定式 to do 连用, 而 if 不行以；但引导条件从句时，只能用 if ，而不能用 whether；e.g. It
6、 depends on whether we have enough time.They don t knowwhether to go there.Please come to see me if you have time条. 件句用 if会引起误会，就要用 whether；e.g. Please let me know whether you want to go.（此句假如把 whether 改成 if ，简单当成条件句懂得）3. 表示爱憎情感的动词，如： enjoy, hate, love, like, dislike, dont mind, resent,appreciate（感谢
7、）等以及某些介词结尾的短语动词如：count on, depend on, rely on, see to, look forward to, be fond of, feel like, see to,等后， 即使没有宾补也要先接形式宾语it ，再接宾语从句；Ilike it when she smiles at me.I love it when you sing.I hate it if I am spoken to loudly in public.（四）表语从句1、表语从句在复合句中作表语， 位于系动词之后； e.g. The question was who could go th
8、ere.2. that 在引导表语从句时无含义，不作成分，通常不省；1表示事实、真理等的实际内容； The fact is that he is lying.The odds are that he will not do it.2）表示某人的看法、信念等的实际内容；Our belief is that things will improve. The trouble is that we are short of money.3. whether 引导表语从句（不行用 ifHis first question was whether Holmes had arrived yet.The qu
9、estion is whether people will buy it.4. 留意以下表语从句中 where, how, why 的译法：This is where Lu Xun once lived.这就是鲁迅曾经住过的地方 .That was how they won the match他. 们就是这样赢得这场竞赛的 .This is why she got up so early this morning.这就是她为什么今日早上起得这么早的缘由.固定句型 :This is where 这就是的地方 This is why这就是的缘由 This is how .这就是的方法1) The
10、reason we didnt trust him is he has often lied2) 2. The reason ishe is unable to operate the machine.A. becauseB. whyC. thatD.Whether3) Go and get your coat. Itsyou left it.A. there B. where C. there whereD. where there（五）同位语从句同位语从句在句中作某一名词的同位语，一般位于该名词（如：news, fact, idea, suggestion, promise等）之后，说明该
11、名词的详细内容；e.g. I have no idea when he will be back.The fact that he had not said anything surprised everybody.名词性从句考点归纳：一、名词性从句的语序精品资料欢迎下载判定以下句子是否正确， （T or F） 1.他是怎么胜利的仍旧是个谜；How was he successful is still a puzzle. How he was successful is still a puzzle. 2.你能告知我他住在什么地方吗？Could you tell me where he liv
12、es. Could you tell me where does he live. 3.Can you tell methe railway station.A. how I can get toB. what can I get toC. where I can got toD. where can I get to规律一：名词性从句在句中要用、二、名词性从句连接词的选用1.that 和 what 的选用1.he wants is a book.2.he wants to go there is obvious 3.The result iswe won the game. 4.This i
13、swe want to know.5.Ishe told us true .6.We should pay attention tothe teacher is saying.7. I have no doubthe will come.8. I have no ideahe did that afternoon. 9.One reason for her preference for city life isshe can have easy access to places like shops and restaurants.A. thatB. howC. whatD. why10. A
14、s a new graduate, he doesn t knowit takes to start a business here.A. howB. whatC. WhenD. which规律二 :在名词性从句中不充当任何成分，而可充当名词性的成分 ；2.whether 和 if 的选用1. I asked hershe had a bike.2. we will hold a party in the open air tomorrow depends on the weather.3. We re wroierd about he is safe4. I don t know he is
15、 well or not.5. I donnotwk or not he is well. 6. The question is he should do it.7. The doctor can hardly answer the questionthe old man will recover soon.8. I haven t decidedto go there.9. I dont care he doesn t come.规律三 : 在名词性从句中表示 “是否”这一概念时，连词一般只能引导动词后宾语从句；假如是从句，从句，从句，后的宾语从句，接不定式 to do 或与 or not 连用都要用 whether 连接，即假如表示 “是否”,选项中既有 if 又有 whether, 那么选 whether 肯定正确；宾语从句是否定句时只用if. What the
