【正文】 。He must answer the question whether he agrees to it or 。（注：if,which 不能引導(dǎo)同位語(yǔ)從句。如：I’ve e from Mr wang with a message that he won’t be able to see you this afternoon． 我從王先生那里來(lái)，他讓我告訴你他今天下午不能來(lái)看你了。I had no idea that you were here．我不知道你在這里。它一般跟在某些名詞后面，用以說(shuō)明該名詞表示的具體內(nèi)容。同位語(yǔ)從句和定語(yǔ)從句的區(qū)別：that作為關(guān)系代詞，可以引導(dǎo)定語(yǔ)從句，充當(dāng)句子成分，在從句中作賓語(yǔ)時(shí)可以省略； that引導(dǎo)同位語(yǔ)從句時(shí)，起連詞的作用，沒(méi)有實(shí)際意義，不充當(dāng)句子成分，一般不能省略。I have no idea when he will e back 。同位語(yǔ)從句通常由that引導(dǎo)，可用于同位語(yǔ)從句的名詞有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。(第一句話說(shuō)明結(jié)果，第二句話說(shuō)明原因)He had seen the film is why he did not see it last ，因此他昨天晚上沒(méi)有去看。(2)“That is because...”句型中從屬連詞because引導(dǎo)的名詞性從句在此作表語(yǔ)，這也是個(gè)常用句型，意為“這就是為什么……/因?yàn)椤薄?/ That is why I 。(why 在表語(yǔ)從句中充當(dāng)原因狀語(yǔ))注意： “That is why...”是常用句型，意為“這就是……的原因/因此……”，其中why引導(dǎo)的名詞性從句在句中作表語(yǔ)，該句型通常用于針對(duì)前面已經(jīng)說(shuō)明過(guò)的原因進(jìn)行總結(jié)，又如： That is why you see this old woman before you know, ，這就是現(xiàn)在這個(gè)老太婆出現(xiàn)在你面前的原因。(what在主語(yǔ)從句中作直接賓語(yǔ)，that作為表語(yǔ)從句的引導(dǎo)詞在該表語(yǔ)從句中不充當(dāng)句子成分，不能省略)// That is what I want to tell 。(how 在表語(yǔ)從句中充當(dāng)方式狀語(yǔ))// The scissors are not what I ?；居梅ū碚Z(yǔ)從句只能置于主句之后，而主句的動(dòng)詞只能是聯(lián)系動(dòng)詞。引導(dǎo)賓語(yǔ)從句時(shí)可以互換if/whether 位于介詞后要用whether 位于句首時(shí)要用whether引導(dǎo)表語(yǔ)從句，主語(yǔ)從句，同位語(yǔ)從句時(shí)要用whether False: The question is if the enemy is marching towards : The question is whether the enemy is marching towards : It looked as if he had understood this 不像賓語(yǔ)從句，在有表語(yǔ)從句的復(fù)合句中，主句時(shí)態(tài)和從句時(shí)態(tài)可以不一致。whether the enemy is marching towards ：A 表語(yǔ)從句一定要用陳述語(yǔ)序。why he cried 。The question is question is when he can arrive at the ，他什么時(shí)候可以到達(dá)酒店。His suggestion is 。She has remained there for an 。The problem is 主語(yǔ) 連系動(dòng)詞 形容詞作表語(yǔ)The problem is when we can get a pay 連系動(dòng)詞 一個(gè)句子作表語(yǔ)表語(yǔ)從句B 連接表語(yǔ)從句的連接詞有：that, what, who, when, where, which, why, whether, has bee a 。簡(jiǎn)介定義：A 表語(yǔ)從句就是用一個(gè)句子作為表語(yǔ)。需要注意的，當(dāng)主語(yǔ)是reason時(shí)，表語(yǔ)從句要用that引導(dǎo)而不是because。That is why he didn’t e to the 。That’s just what I 。其基本結(jié)構(gòu)為：主語(yǔ) + 系動(dòng)詞 + that從句。,主句的謂語(yǔ)動(dòng)詞是think,believe,imagine,suppose,consider,espect,fancy,guess等,并且主句的主語(yǔ)是第一人稱而且為一般現(xiàn)在時(shí),從句的否定詞一般要轉(zhuǎn)移到主句上來(lái), don’t think he will e to my think he won’t e to my don’t believe that man is killed by Jim,is he?我認(rèn)為那個(gè)人不是Jim所殺的,是不是? 如果賓語(yǔ)從句中有某個(gè)含有否定意義的形容詞或副詞, find that he never listens to the teacher carefully,does he? 我們發(fā)現(xiàn)他從來(lái)不仔細(xì)聽(tīng)老師講課,是不是? 當(dāng)主句為現(xiàn)在時(shí)或?qū)?lái)時(shí),①?gòu)木溆靡话氵^(guò)去時(shí)或過(guò)去進(jìn)行時(shí)表示與主句謂語(yǔ)動(dòng)詞動(dòng)作同時(shí)發(fā)生I only knew he was studying in a western country,but I didn’t know what country he was , asked me if I was reading the story The Old Man and the Sea when he was .②從句過(guò)去完成時(shí)表示該動(dòng)作發(fā)生在主句謂語(yǔ)動(dòng)作之前 He told me that he had told Mary about the meeting .③從句謂語(yǔ)用過(guò)去將來(lái)時(shí)表示該動(dòng)作發(fā)生在主句謂語(yǔ)動(dòng)作之后The reporter asked if the government would take necessary measures to put down the ,那么從句的時(shí)態(tài)不根據(jù)主句的時(shí)態(tài)而變化 The teacher said that the moon goes around the earth ,which,what,when,where,how,why等表疑問(wèn)時(shí),不能按正常語(yǔ)序安排,經(jīng)常將這類(lèi)引導(dǎo)詞置于句首Who do you think the public might choose as their favorite singer this year? 、表語(yǔ)從句在句中作表語(yǔ)的從句叫表語(yǔ)從句。,that或this,that做主語(yǔ)的定語(yǔ)時(shí)。(包括非謂語(yǔ)動(dòng)詞)與賓語(yǔ)從句之間有插入語(yǔ)時(shí)。）⑤ 避免歧異時(shí), ,suggest,explain,agree,wonder,prove,mean,state,feel,hold等動(dòng)詞的賓語(yǔ)時(shí)。從句是客觀真理時(shí)，只用一般現(xiàn)在時(shí)。：，從句可用任意時(shí)態(tài)。例如： We don’t think you are 。例如：The teacher told us that Tom had left us for America．, believe, imagine, suppose等等動(dòng)詞引起的否定性賓語(yǔ)從句中，要把上述主句中的動(dòng)詞變?yōu)榉穸ㄊ?。Can you tell me whether to go or to stay? 你能否告訴我是去還是留？，當(dāng)主句動(dòng)詞是現(xiàn)在時(shí)，從句根據(jù)自身的句子情況，而使用不同時(shí)態(tài)。The question is whether she should have a low opinion of the test?現(xiàn)在的問(wèn)題是她是否應(yīng)該有一個(gè)低意見(jiàn)的測(cè)試？Everything depends on whether we have enough 。此外，whether與if 在作“是否”的意思講時(shí)在下列情況下一般只能用whether，不用if： ；；；“or not”時(shí)；。She will give whoever needs help a warm ，她都會(huì)給予熱情的支持。例如：I want to know what he has told 。The mander ordered that troops(should)set off at 。注意：在demand、order、suggest、decide、insist, desire, request, mand等表示要求、命令、建議、決定等意義的動(dòng)詞后，賓語(yǔ)從句常用“（should）+ 動(dòng)詞原形”。例如：He has told me that he will go to Shanghai 。引導(dǎo)賓語(yǔ)從句的關(guān)聯(lián)詞與引導(dǎo)主語(yǔ)從句表語(yǔ)從句的關(guān)聯(lián)詞大致一樣，在句中可以作謂語(yǔ)動(dòng)詞或介詞及非謂語(yǔ)動(dòng)詞的賓語(yǔ)。例如：Is it likely that it will rain in the evening? 與that 在引導(dǎo)主語(yǔ)從句時(shí)的區(qū)別What 引導(dǎo)主語(yǔ)從句時(shí)在從句中充當(dāng)句子成分，如主語(yǔ)．賓語(yǔ)．表語(yǔ)，而that 則不然。例如：It occurred to him that he failed in the examination.(4)It doesn’t matter how/whether …結(jié)構(gòu)中的主語(yǔ)從句不可提前。(2)It is said ,(reported)…結(jié)構(gòu)中的主語(yǔ)從句不可提前。被強(qiáng)調(diào)部分指人是也可用who/whom。 作形式主語(yǔ)和it引導(dǎo)強(qiáng)調(diào)句的比較It 作形式主語(yǔ)代替主語(yǔ)從句，主要是為了平衡句子結(jié)構(gòu)，主語(yǔ)從句的連接詞沒(méi)有變化。t been decided yet.（4）Whom we must study for is a question of great importance.（5）What caused the accident remains unknown.（6）Whatever you did is right.（7）Who the watch belongs to was lost is unknown.（8）What we need is time.（9）What we need are good :（1)引導(dǎo)主語(yǔ)從句連詞有that,whether,who,what,whatever等（2)連詞位于句首不能省略（3)主語(yǔ)從句大多數(shù)情況下視為三單,但也有例外,如例9第二部分：為了防止句子頭重腳輕，通常把形式主語(yǔ)it放在主語(yǔ)位置，真正主語(yǔ)擱置于句末（1）It is certain that he will win the match.（2）It is true that he has made a very important discovery in chemistry.（3）It is very likely that they will hold a meeting.（4）It is strange that he should do that.（5）It is important that we all should attend the meeting.（6）It is strange that the man should have stuck to his silly ideas.（7）It is a pity that we won39。常用句型如下：（1）It + be + 名詞 + that從句（2）It + be + 形容詞 + that從句（3）It + be + 動(dòng)詞的過(guò)去分詞 + that從句（4）It + 不及物動(dòng)詞 + that 從句另注意在主語(yǔ)從句中用來(lái)表示驚奇、不相信、惋惜、理應(yīng)如此等語(yǔ)氣時(shí)，謂語(yǔ)動(dòng)詞要用虛擬語(yǔ)氣“(should)+do”，常用的句型有：It is necessary(important, natural, strange, etc.)that …It is suggested(requested, proposed, desired, etc.)that…第一部分：常規(guī)主語(yǔ)從句，即句子在復(fù)合句中充當(dāng)一個(gè)主語(yǔ) 主語(yǔ)從句的時(shí)態(tài)：不受主句的時(shí)態(tài)影響和限制。有時(shí)為避免句子頭重腳輕，常用形式主語(yǔ)it代替主語(yǔ)從句作形式主語(yǔ)放于句首，而把主語(yǔ)從句置于句末。It is known to us how he became a 。例如：What he wants to tell us is not ，還不清楚。主語(yǔ)從句通常由從屬連詞that，whether，if和連接代詞what，who，which，whatever，whoever以及連接副詞how，when，where，why等詞引導(dǎo)。但在下列情況下，只可用whether： “or not”Whether he will e is not ，用 it充當(dāng)形式主語(yǔ)。一、引導(dǎo)名詞性從句的連接詞引導(dǎo)名詞性從句的連接詞可分為三類(lèi)： 連詞：that（無(wú)任何詞意）whether, if（均表示“是否”表明從句內(nèi)容的不確定性）as if ,as though（均表示“好像”，“似乎”）以上在從句中均不充當(dāng)任何成分連接代詞：what, whatever, who, whoever, whom,whose, whichever,whomever 連接副詞：when, where, how, why,how many,how much,how often 不可省略的連詞：。第一篇：名詞性從句歸納及練習(xí)高中英語(yǔ)語(yǔ)法之名詞性從句在句子中起名詞作用的句子叫名詞性從句(Noun Clauses）。名詞性從句的功能相當(dāng)于名詞詞組, 它在復(fù)合句中能擔(dān)任主語(yǔ)、賓語(yǔ)、表語(yǔ)、同位語(yǔ)、介詞賓語(yǔ)等，因此根據(jù)它在句中不同的語(yǔ)法功能，名詞性從句又可分別稱為主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句和同位語(yǔ)從句。That she was chosen made us very heard the news that our team had ：whether與if 均為“是否”的意思。It is not important