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1、宾语从句和表语从句详解名词性从句指的是在整个句子中起名词作用的从句。这种从句可以做主语、宾语、表语、同位语等，所以这类从句包括主语从句、宾语从句、表语从句和同位语从句。各种名词性从句的结构都是相同的，即由if， whether， that和各种疑问词充当连接词，后接陈述语序。例如：What they are doing seems very important（主语从句） 他们在做的事似乎很重要。My hope is that he will be the best student in the class（表语从句） 我的愿望是他能够成为班上最好的学生。Nobody knows who he
2、 is（宾语从句） 大家都不知道他是谁。I dont like the idea that money is everything（同位语从句） 我不喜欢金钱就是一切这一观点。引导名词性从句的连接词中，除了that，if和whether之外其它的都作从句中的一个成分。【宾语从句】在句子中作动词或介词宾语的从句叫做宾语从句。引导宾语从句的词有连词that， whether， if；连接代词who， which， what以及其强调形式 whoever， whichever， whatever； 连接副词 when， where， why， how等。例如：Do you know where th
3、e Greens live? I have no interest in how rich he is宾语从句主要用于下面五种结构：1由that引导的宾语从句（that 引导宾语从句时，特别是在口语中可省略）The boy believes that he will travel through space to other planetsthat引导的宾语从句多用于say， think， insist， wish， hope， demand， imagine， wonder， know， suppose， see， believe， agree， admit， deny， expect， e
4、xplain， order， command， feel， dream， suggest， hear， mean， notice， prefer， request， require， propose， declare， report等后。当主句谓语动词是 think， believe， suppose， expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。例如：I dont think it is right for him to treat you like that（ I think it is not right for him ）that不能省略的情况：（1）当句中的
5、动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。如：He said （that） you were too young to understand the matter and that he was asked notto tell you（2）当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。如：Just then I noticed， for the first time， that our master was wearing his fine greencoat and his black silk cap（3）当that从
6、句是双宾语中的直接宾语时，that不可省。如：I cant tell him that his mother died2由特殊疑问词引导的宾语从句这样的宾语从句实际上是由特殊疑问句变化而来的，宾语从句要用陈述句语序。用于这种结构的动词常常是：see， say， tell， ask， answer， know， decide， show， find out， imagine， suggest， doubt， wonder， discover， understand， inform， advise等。I cant decide which book I should buy3由whether（if
7、）引导的宾语从句I wonder whether（if） they will come to our party由whether（if）引导的宾语从句，实际上是一般疑问句演变而来的。意思是“是否”。宾语从句要用陈述句语序。一般说来，在宾语从句中whether与if可以互换使用。4宾语从句后带有宾补时，需用it作形式宾语，而把宾语从句放在句后，这时that不省略。例如：He thought it wrong that they left the child alone at home【表语从句】在句子中作表语的从句叫做表语从句。引导表语从句的词有连词that，whether；连接代词who，wh
8、at，which；连接副词when，where，how，why以及其它连词as if，as though，because等。例如：The question is whether it is worth readingThey are just what I wantThats why they were late1含有表语从句的复合句中的主语通常是fact，truth，explanation，problem，opinion，view等。如：The fact is that fish cant go without water事实是鱼离开水不能存活。2 as if （as though）也可以用
9、于表语从句。但多是以下面形式出现。主语look（seem）as if从句如：It looked as if it was going to snowIt seems as if there will be a quarrel soon注意：不用 if 引导表语从句。reason做主语时，表语从句应由that引导，不用because。 that 引导表语从句时，通常不能省略。专项练习1 I flew to New York for the talk show on TV last week Is that _you had a few days off?A why B when C what D
10、 where2 I ask her _ come with meA if she will B if will sheC whether will sheD will she3 It was a matter of _ would take the positionA who B whoeverC whomD whomever4 Can you tell me _?A who is that gentleman isB that gentleman is whoC who that gentleman is D whom is that gentleman5 Can you tell me _
11、 the railway station?A how I can get toB what can I get toC where I can got toD where can I get to6 It is generally considered unwise to give a child _ he or she wantsA however B whatever C whichever D whenever7 Do you know _ ?A what is his nameB how is his nameC what his name isD how his name is8 G
12、o and get your coat Its_ you left itA thereB whereC there where D where there9 I wonder how much _A does the watch costB did the watch costC the watch costed D the watch costs10 It was _ he said _ disappointed meA what；that B that；thatC what；what D that；what11 Is Mary from New York City? I dont know
13、 _A from what city does she come fromB from what city she comeC what city does she come fromD what city she comes from12 Henry killed the dog Ill ask him why _A did he do that B he did thatC he did D he has done so13 Have you seen Henry lately? My boss wants to know _A how he is getting alongB how i
14、s he getting alongC what he is getting alongD what is he getting along14 I am sure _ he said is trueA that B about that C of that D that what15 You cant imagine _ when they received these nice Christmas presentsA how they were excitedB how excited they wereC how excited were theyD they were how excited16 Why the explosion occurred was _ the laboratory attendant had been carelessA
