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2021-02-22 22:21 |
2021年考博英语语法讲解之名词性从句用法
名词性从句相当于名词,可用作主句的主语、表语、宾语和同位语。因此,名词性从句分为主语从句、表语从句、宾语从句和同位从句。引导名词性从句的连接词有:连接代词:who, whose, whom, what, which,有词义,在从句中担任成分,如主语、表语、宾语、或定语等;连接副词:when, where, why, how,有词义,在从句中担任成分,作状语;连接词:that, whether, if, as if,if (whether), as if虽有词义,但在从句中不担任成分;that 无词义,在从句中不担任成分,有时可省略。 ^ )"Il 今后对名词性从句的考查仍将集中在关联词的选用上,特别石堆what引导的名词性从句的考查。名词性从句与其他从句的混合考查将在今后高考中占据一席之地。易混句型的辨析,比如it作形式主语,主语从句后置的句型与强调句型的辨析将仍作为高考考查的重点。 #%ld~dgz- 【知识点归纳】
{[:C_Up)f 名词性从句的用法 #J3}H 在句子中起名词作用的句子叫名词从句 (Noun Clauses)。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。 QjXJo$I6 一、引导名词性从句的连接词 $Bncdf 引导名词性从句的连接词可分为三类:连词:that(无任何词意);whether, if(均表示“是否”表明从句内容的不确定性);as if ,as though(均表示“好像”,“似乎”)。 *-fd$l. 以上在从句中均不充当任何成分 6Q>:vQ+E 连接代词:what, whatever, who, whoever, whom, whose, which. Whichever, whomever VI9rezZ* 连接副词:when, where, how, why :4 z\Q] 不可省略的连词: OAiW8BAe 1. 介词后的连词 _kRc"MaB 2. 引导主语从句和同位语从句的连词不可省略。 RLL
ph That she was chosen made us very happy. 6
%aaK|0 We heard the news that our team had won. U5-8It2OR 比较: 12L`Gi Whether与if 均为"是否"的意思。 但在下列情况下,whether 不能被if 取代: ?mC'ZYQI 1. Whether引导主语从句并在句首; Y)lr+~84f 2. 引导表语从句 G Wa6FX:/ 3. Whether从句作介词宾语; Hc<@T_h+2 4. 从句后有"or not" y2?9pVLa\y Whether he will come is not clear. 6~ y' 大部分连接词引导的主语从句都可以置于句末,用 it充当形式主语。 [ /*;}NUv It is not important who will go. r{d@74
It is still unknown which team will win the match. Go:
(R {P 二、具体分类 am3JzH 1.主语从句 E<! L^A
M` 作句子主语的从句叫主语从句。主语从句通常由从属连词that,whether,if和连接代词what,who,which,whatever,whoever以及连接副词how,when,where,why等词引导。that在句中无词义,只起连接作用;连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。例如: 05HCr"k What he wants to tell us is not clear. 他要跟我们说什么,还不清楚。 PX^k; Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。 3SbZD It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。 mh[,E8'd Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行,还没有宣布。 b
@4UR< 【典例1】It is immediately clear ____ the financial crisis will soon be over. }m?Ut| A. since B. what C. when D. whether iJ*Wsp 【答案】D <4;,
y*"n 【解析】考查主语从句的用法。该句的意思时:经济危机是否会很快结束是很明显的事情。“是否”用whether表示,不能选when是因为从句中由soon这一实践状语。 RJ0,7E<B 【典例2】_____ was most important to her, she told me, was her family. _8K8Ai-~.> A. It B. This C. What D. As uA
=%EEZ 【答案】C
[];wP'* 【解析】she told me是插入语,可删除。what引导主语从句,在从句中充当主语。 _(gkYJ+MK 有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下: &,P
A+# (1)It + be + 名词 + that从句 |zfFB7}v (2)It + be + 形容词 + that从句 7=X6_AD (3)It + be + 动词的过去分词 + that从句 WwnBe"7M (4)It + 不及物动词 + that 从句 BHgs, 另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时,谓语动词要用虚拟语气“(should) +do”,常用的句型有: =bJ$>Djp It is necessary (important, natural, strange, etc.) that … 3I}AA.h'00 It is a pity (a shame, no wonder, etc.) that… 0)h.[O8@> It is suggested (requested, proposed, desired, etc.) that… \pK&gdw 【典例】It is obvious to the students ______ they should get well prepared for their future. am
.d^' A. as B. which C. whether D. that k
75 p 【答案】D (dNF)(wn 【解析】考查名词性从句。本空格处应是一个主语从句的引导词,因该主语从句不缺成分,且句意完整,故应用不作任何成分的连词that。 G] tT=X[ 2.宾语从句 B$s6|~ 名词句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样,在句中可以作谓语动词或介词及非谓语动词的宾语。 OraT$lV)_ (1) 由连接词that引导的宾语从句 @(x]+*) 由连接词that引导宾语从句时,that在句中不担任任何成分,在口语或非正式的文体中常被省去,但如从句是并列句时,第二个分句前的that不可省。例如: O(0a l#Fvj He has told me that he will go to Shanghai tomorrow. 他已经告诉我他明天要去上海。 m^ar:mK
@ We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好,别人什么都不好。 r:0RvWif 注意:在demand,order,suggest,decide,insist,desire,request,command等表示要求、命令、建议、决定等意义的动词后,宾语从句常用“(should)+ 动词原形”。例如: UBQtD|m\ I insist that she (should) do her work alone. 我坚持要她自己工作。 }*-fh$QJ The commander ordered that troops (should) set off at once. 司令员命令部队马上出发。 Mx93D
(2)用who,whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等关联词引导的宾语从句相当于特殊疑问句,应注意句子语序要用陈述语序。例如: 5B8/"G I want to know what he has told you. 我想知道他告诉了你什么。 }/NjZ*u She always thinks of how she can work well. 她总是在想怎样能把工作做好。 ^HP$r* She will give whoever needs help a warm support. 凡需要帮助的人,她都会给予热情的支持。 -Tuk.>i) 【典例1】The companies are working together to create _______ they hope will be the best means of transport in the 21st century. *Y53bZ A. which B. that C. what D. who K|~!oQ 【答案】C {t0!N]' 【解析】create后为宾语从句,从句中they hope是插入语,可删除。因为从句中缺少主语,所以用what引导该从句。 Y@ ;/Sf$Q 【典例2】Could I speak to is in charge of International Sales please? |4aU&OX A. who B. what C. whoever D. whatever 9
s2z=^ 【答案】C
6,~
% 【解析】 考查名词性从句。题干中介词to后面为宾语从句,从句中缺少主语,因此填whoever。 @wAYhnxq (3)用whether或if引导的宾语从句,其主语和谓语的顺序也不能颠倒,仍保持陈述句语序。此外,whether与if 在作“是否”的意思讲时在下列情况下一般只能用whether,不用if: cqZlpm$c a. 引导主语从句并在句首时;b. 引导表语从句时;c . 引导从句作介词宾语时;d. 从句后有“or not”时;e. 后接动词不定式时。例如: <Z]j89wzDZ Whether there is life on the moon is an interesting question. 月球上有没有生命是个有趣的问题。 (]fbCH: The question is whether she should have a low opinion of the test?
2Z^p) Everything depends on whether we have enough money. 一切要看我们是否有足够的钱。 @1pfH\m I wonder whether he will come or not. 我想知道他来还是不来。 #f=41d% Can you tell me whether to go or to stay? 你能否告诉我是去还是留? 9dp4&&Z+F (4)注意宾语从句中的时态呼应,当主句动词是现在时,从句根据自身的句子情况,而使用 mSFA i 不同时态。例如: Jl6biJx he studies English every day. (从句用一般现在时) h;cw=G he studied English last term. (从句用一般过去时) ^\VVx:] I know (that) he will study English next year. (从句用一般将来时) XK0lv
8( he has studied English since 1998. (从句用现在完成时) TPN1Rnt0` 当主句动词是过去时态(could, would除外),从句则要用相应的过去时态,如一般过去时,过去进行时,过去将来时等;当从句表示的是客观真理,科学原理,自然现象,则从句仍用现在时态。例如: ~ me/ve The teacher told us that Tom had left us for America. yzNDXA. (5)think, believe, imagine, suppose等等动词引起的否定性宾语从句中,要把上述主句中的动词变为否定式。即将从句中的否定形式移到主句中。例如: !*"#*)S. We don’t think you are here. 我们认为你不在这。
a(`"qS I don’t believe he will do so. 我相信他不会这样做。 Qq.Ja%Zq 3.表语从句 uD4W@*PYr 在句中作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样,表语从句位于连系动词后,有时用as if引导。其基本结构为:主语 + 系动词 + that从句。例如: >v/%R~BuX The fact is that we have lost the game. 事实是我们已经输了这场比赛。 _*t75e$- That’s just what I want. 这正是我想要的。 `[_p,,}Ir This is where our problem lies. 这就是我们的问题所在。 ,;h}<("q That is why he didn’t come to the meeting. 那就是他为什么不到会的原因。 ?*QL;[n1 It looks as if it is going to rain. 看上去天要下雨了。 IJZx$8&A 需要注意的,当主语是reason时,表语从句要用that引导而不是because。例如: d=HD!
e The reason why he was late was that he missed the train by one minute this morning . B|AIl+y 【点拨】whether 可引导表语从句,但与之同义的if却通常不用于引导表语从句。 OR10IS 【典例1】The little girl who got lost decided to remain ________she was and wait tor her mother. d8^S~7 A. where B. what C. how D. who 91FVe 【答案】A wI[J> 9Qn 【解析】remain是系动词,后加表语从句,由句意可知,从句缺地点状语,所以选A。 mP
+H
C)2 【典例2】The last time we had grat fun was _______ we were visiting the Water Park. A{Y/eG8 A. where B. how C. when D. why A(
JgAV1{ 【答案】C gp^xl>E 【解析】was后为表语从句,此处when与the last time相呼应,根据句意可排除其他选项。 =d
JRBl 4. 同位语从句 1=jwJv.^/ 同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导,可用于同位语从句的名词有advice,demand,doubt,fact,hope,idea,information,message,news,order,problem,promise,question,request,suggestion,truth,wish,word等。例如: '"V]>) The news that we won the game is exciting. 我们赢得这场比赛的消息令人激动。 =A/$[POr I have no idea when he will come back home. 我不知道他什么时候回来。 ;'4Kg@/ The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。 #4& <d.aw' 【典例】We should consider the students’ request ________ the school library provide more books on popular science. |f[:mO A. that B. when C. which D. where 7I:<i$)V 【答案】A DPlmrN9@= 【解析】考查名词性从句。根据题意知,空格处是同位语从句的引导词,修饰中心名词request,且在句子中不充当成分,故用that。这句话的意思是我们应该考虑学生的这个要求,即学校图书馆应该多提供一些大众科学方面的书籍。 +J
q~39 三、对比与用法 ~H626vT37 1.同位语从句和定语从句的区别: KC-@2,c9V that作为关系代词,可以引导定语从句,充当句子成分,在从句中作宾语时可以省略; that引导同位语从句时,起连词的作用,没有实际意义,不充当句子成分,一般不能省略。 YD;"_yH 试比较下面两个例句: <IQ}j^u-F I had no idea that you were here.(that引导同位语从句,不能省略) hJoh5DIE95 Have you got the idea(that)this book gives you of life in ancient Greece?(that引导定语从句,作宾语,可以省略) r
4+%9) 2.that-从句作主语通常用it作先行词,而将that-从句置于句末。 $w! v 用it作形式主语的that-从句有以下四种不同的搭配关系: F#l!LER^1g a. It + be +形容词+ that-从句 0F[+rh"x It is necessary that… 有必要…… )s8{|) - It is important that… 重要的是…… Z}r9jM It is obvious that… 很明显…… .:TSdusr~ b. It + be + -ed 分词+ that-从句 q>dERN& It is believed that… 人们相信…… x1 1ug It is known to all that… 从所周知…… l|
QQ It has been decided that… 已决定…… +C`zI~8 c. It + be +名词+ that-从句
6w$pL( It is common knowledge that… ……是常识 e\H1IR3 It is a surprise that… 令人惊奇的是…… _n!W4zwi It is a fact that… 事实是…… jsIT{a*] d. It +不及物动词+ that-分句 jRSY`MU}t+ It appears that… 似乎…… %`^{Hh` It happens that… 碰巧…… hXP'NS`iv It occurred to me that… 我突然想起…… ,V #r It is quite clear that the whole project is doomed to failure. $ud\CU:r 很清楚,整个计划注定要失败。 PQ4)kVT It's a pity that you should have to leave. Q`(h 你非走不可真是件憾事。 0D^c4[Y'l 3.否定转移 `:;fc (1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中,即主句的谓语动词用否定式,而从句的谓语动词用肯定式。 t,R4q* I don't think I know you. 我想我并不认识你。 Iq:
G9M I don' t believe he will come. 我相信他不回来。 kZH IzU 注意:若谓语动词为hope,宾语从句中的否定词不能转移。 vS+E`[ I hope you weren't ill. 我想你没有生病吧。 g7<u eF (2)将seem, appear 等后的从句的否定转移到前面。 {&s.* 5 It doesn't seem that they know where to go. @N+6qO} 看来他们不知道往哪去。 3`DwKv`+ It doesn't appear that we'll have a sunny day tomorrow. J+0T8
?A 看来我们明天不会碰上好天气。 !6DH6<HC 【备考策略】 3q:>NB< 考生对于名词性从句的复习和应试关键要把握每个引导词的意义,因为在对于名词性从句的考查中,引导词在句子中都起作用,有意义,因此在分析句子结构,对比辨别名词性从句、状语从句、强调句式后,最后还是要选择引导词;另外还要注意以下几点: >r5s>A[YC 1.what 引导词的考查,尤其位于介词后引导的宾语从句以及引导名词性从句时的双重作用。 E3,Nc`'m9 2.Whether和if 的区别,尤其注意他们的不同之处。 \tZZn~ex 3.名词性从句和其它从句的兼容结构测试。 ""u>5f 4.句子语序和时态。 0N4+6k| 具体说: \ q=Bbfzv 1.掌握名词性从句的分类功能 KPMId`kf 名词性从句根据其在主句的功能作用又可分为主语从句、宾语从句、表语从句和同位语从句。 ":,J<|Oy (1) 若从句在句中作主语为主语从句 4WZ"8 (2) 若从句在句中作宾语为宾语从句 $jgEB+ (3)若从句在句中作表语为表语从句 dSw%Qv*y (4) 若从句在句中作同位语为同位语从句 :x/L.Bz 2.掌握连词的含义及分类 = s$UU15 绝大多数名词性从句的连词都有其实在意义,称为有义连词,如what表“……的内容”,when表“……的时间”,where表“……的地点”,why表“……的原因”,how表“如何;怎样”,who表“谁”,if, whether表“是否”;没有实在意义的连词叫无义连词,无义连词只有that一个。 p}O[A` 3.掌握名词性从句的语序 +LeM[XX 名词性从句用陈述语序。 7\sR f/ 4.掌握名词性从句和其它从句之间的关系 vK~tgZ& 有些连词除引导名词性从句外还可引导其它从句,应掌握它们之间的关系。 e!JC5Al7 (1) if ,whether表"是否"时引导名词性从句;if表“如果”时引导条件状语从句;whether表“无论是否;不管是否”时引导让步状语从句。 m(?ZNtBQt (2) when表“……的时间”,where表“……的地方”时引导名词从句;when表“当……的时候”引导时间状语从句,where表“……的地方”,且修饰行为动词时,引导地点状语从句;when, where从句作定语修饰先行词时引导定语从句。 OVgx2_F 【专题巩固】 %$H~ 1. A warm thought suddenly came to me _______I might use the pocket money to buy some flowers for my mother’s birthday . O[/l';i A. if B. when C. that D. which leo
mm+f^ 2. See the flag on top of the building ? That was _______ we did this morning. ej&ZE
n A when B. which C. where D. what STY\c5 3. The government has announced that a modern city will be set up in _______is still a wasteland now. `'
"125T A. what B. which C. that D. where UpIt"+d2& 4.Many people wrote articles on _______Liu Xiang had failed to compete in the event . $MB/j6#j A. why B. what C. who D. that l!^+Xe
g~ 5.The couple are spending their holiday on _______is described as one of the most beautiful islands. !Al?B9KJ A. that B. what C. which D. where An0Zg'o!G 6.The book is meant to _______needs it . `(@}O?w!1 A. who B. whoever C. whomever D. whom i`)h~V|G 7. In his speech, Premier Wen Jiabao points out that creativity is_______it takes to keep a nation highly competitive. r^,XpRe&M A. how B. what C. which D. that BqA 8.The experience of the Chinese nation attests to a truth_______ a nation loses in times of disaster will be made up for by her progress. Gcz@z1a=n A. that what B. what C. that D. what that pk,]yi,ZF 9._______has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem . 3Sb'){.MT+ A. That B. What C. In spite of what D. Though what //_aIp 10. _______is certain is _______prevention is more important than treatment. ?rG>SA>o A. It; that B. What; that C. As; what D. What; what c
Oi:bC@ 11. Nobody would stand out admitting the fact, for some reason, _______they lost the game. rbw5.NU A. that B. which C. what D. why ~p0M| 12.—The patient looks much better. _______is it that has made him_______he is today? jx7b$x] —Perhaps the special medicine and his family’s patient care. 9X- w5$< A.What; that B.That; that C.What; what D.What; which QFS5PZ 13. After three hours’ climbing , they reached _______ they thought was the place they’d been dreaming of . [)E.T,fjMQ A.what B.which C.where D.that Sb;=YW
1< 14. A plan has been put forward _______more graduates should go to work in the country |)pRkn8x A. when B. that C. whether D. how VX<jg #( 15.It is pretty well understood _______controls the flow of carbon dioxide in and out the atmosphere today. l#;DO9 A. that B. when C. what D. how `$5
QTte 【参考答案及解析】 v==b.
2= 1. C 句意:我脑海中突然出现一个温情的念头,用我的零花钱给妈妈买些鲜花作为她的生日礼物。本题考察名词性从句用法。I might use the pocket money to buy some flowers for my mother’s birthday .做A warm thought 的同位语从句。中间被suddenly came to me隔开,增加了试题难度。此外,部分考生由于对同位语从句和定语从句不分,故错选D为答案。 m\hzQ9 2. D 表语从句中缺did的宾语。 Wu!s 3. A “_______is still a wasteland now .”做介词in的宾语从句,从句中缺主语句意为:政府已经宣布一座现代化的城市将在这片现在仍是废墟的地方建成。 6yN8(&` 4. A“_______Liu Xiang had failed to compete in the event.”做介词on的宾语,宾语从句中不缺主干,故排除B和C。另外that不引导介词的宾语从句(固定搭配除外),所以排除D。 #2~-I 5. B “_______is described as one of the most beautiful islands .”宾语从句,从句中缺少主语, E1&9( L5 6. B whoever在宾语从句中做主语,部分学生,因为只看到介词to,误认为要添whomever做介词的宾语。 p]-\\o} 7. B “_______it takes to keep a nation highly competitive.”做表语从句,从句中缺少takes的宾语,构成 it takes sth to do sth 结构。 f=L&>X 8. A本题句子结构比较复杂,“_______ a nation loses in times of disaster will be made up for by her progress”做a truth的同位语从句,同位语从句中_______ a nation loses in times of disaster为主语从句。本句共有两个从句,故有两个引导词。句意为“中华民族的经验证明了一个真理,即,一个民族在灾难中失去的,必将从民族的进步中得到补偿。 ~5Cid)Q}@o 9. C “_______has recently been done to provide more buses for the people”在句中做让步状语,而D. Though what错误, 因为, 一个单一的从句不能用两个连词引导.句意: 尽管在为人们提供更多公交车这件事上, 投入了很多, 但是公交工具的缺乏, 仍然是个问题. &*4C{N 10.B “_______is certain”在句中做主语,主语从句缺少一个主语,需要用What; “_______prevention is more important than treatment .”系表语从句,句意与结构完整,只有that,可以这样用。 dpPu&m+ 11.A“_______ they lost the game.”在句子中做the fact 的同位语从句,从句意思结构完整,结构完整。 5@kNvi 12. C先将句子结构理清楚,it is _______that has made him _______he is today 就可以判断,第一个空是考察强调句型的特殊疑问形式;第二个空则是表语从句,表语从句中缺少he is的表语。句意:病人好多了,是什么使得他成为现在这个样子。 \[57Dmo 13. A考生误以为是地点状语从句,误选C.where。而reached是及物动词,后边接的是宾语从句,宾语从句除去插入语they thought,应该缺主语。 |v6kZ0
B< 14.B 考察同位语从句,表达A plan的具体内容,has been put forward将名词与从句隔开,加大了难度。 ^z%ShmM&LZ 15.C 主要测试主语从句。分析句子结构可知:句子属于形式主语格式;另外主句中缺少主语。双重作用的引导词只能是what。例如:It is still doubtful what he said at the meeting yesterday。昨天他在会上说的话仍然值得怀疑。 KDX1_r=Y
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