专四填空常考结构小结.doc

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专四填空常考结构小结一、主句单一原则任何一个句子中只可能有一个主句。做题时考生需要首先判断原题中已经给出的句子结构,如果已经有一个主句,那么就绝对不能够再出现另一个主句,除非中间有连接词进行联系。例1:_, work songs often exhibit the song culture of a people in a fundamental form.(A) They occur where they are (B) Occuring where (C) Where they occur (D) Where do they occur分析:空格后面是一个主句,(A)为带有从句的主句,空格后又是主句,有两个主句一定错。C为地点状语从句,正确(劳动歌曲发生的地方)。例2: _Indiana, is in a rich farming and dairy area, it is primarily a diversified industrial center(A) Fort Wayne (B) Although Fort Wayne (C) For wayne is in (D) Fort Wayne, in分析:空格后有两个谓语动词但中间没有连接词,由此可知,最后一句话是一个主句,空格处应该有从句引导词,四个选项中只有(B)中although能引导从句,故选(B)。二、谓语动词专一原则任何一个句子只可能存在一个谓语动词。句子中不可能没有谓语动词,也不能多于一个谓语动词(除非中间存在连接词)。例1:William Walkers mural, “Wall of Respect,” _an outdoor wall in Chicago, deals withsocial issues.(A) covers (B) covers it (C) which covers (D) which it covers分析:空格后的deals with 是谓语动词,A, B是谓语形式, 和deals with 之间没有连接词,可先排除; D 中的it多余,因为在定语从句中which已经作了主语;C构成正确的定语从句例2:In copper engravings and etchings, _caused by the edges of the plate is clearly visible on the paper.(A) the impression is (B) if the impression is (C) impressions (D) the impression分析:题目中的is是谓语,A,B中是谓语重复。C为复数名词,与后面的谓语动词is的数不一致,故也排除。因此选择D,caused. 修饰impression三、平行结构技巧:如果填空题中空格的后面有and, 或者and后面有空格,那么这道题目一定是考察平行结构。填空题中平行结构出现的形式是: A and B, A , B, and C例1:The technique of recording, classifying, and_is known as accounting.(A) an enterprises transactions summary (B) the summarizing of an enterprises transactions(C) transactions of an enterprise are summarized (D) summarizing the transactions of an enterprise分析:空格的后面是and, 一般考平行结构,空格处缺与前面recording、classifying并列的动名词。四个选项中只有(D)符合条件,故选(D)。例2:Louis T. Wright, a surgeon, developed ingenious orthopedic braces, _, and supervised the first use of Aureomycin on human patients.(A) treating skull fractures that he pioneered in (B) pioneered in treating skull fractures(C) which pioneered in treating skull fractures (D) he was a pioneer in the treatment of skull fractures分析:空格后面是and, 空格处缺少和developed、supervised平行的谓语动词,因此选择(B)。四、宾语从句结构宾语从句的引导词在前面的主从复合句中已经提到。这里指出的是填空题中关于宾语从句考的最多的两个结构: state(陈述,表明)+that / indicate(指明,表明)+that例1:The quantum theory states _, such as light, is given off and absorbed in tiny definite units called quanta or photons.(A) energy that (B) that it is energy (C) it is energy (D) that energy分析:空格前的谓语动词states一般接关系连词that引导的宾语从句,故首先排除C。空格后已有谓语动词,空格不应再出现谓语动词,因此D正确。例2:Studies of the gravity field of the Earth indicate_yield when unusual weight is placed on them.(A) although its crust and mantle (B) its crust and mantle to (C) that its crust and mantle (D) for its crust and mantle to分析:空格处显然缺谓语动词indicate的宾语。(A)和(D)不能作宾语,可首先排除。(B)使句子结构混乱、语义不清,因此选择(D),构成宾语从句。五、介词+ which结构许多同学在选择which还是介词+which上总是不太明白,这里有一个技巧可以告诉大家。“which”后面一定加一个缺主语或者宾语的句子,因为“which”在这个句子中作了宾语或者主语成分。 “介词+ which”后面则跟一个完整的句子,因为”介词+which”整个结构在定语从句中作状语。例1:In the United States, a primary election is a method _voters select the nominees for public office.(A) that (B)by which (C)is that (D)by those分析:空格前后都是句子,因此缺从句引导词或连接词,首先排除C和D。A能够引导从句,但是根据题意,修饰method是不通的。B是介词+which, 引导定语从句,(大选是一种方法,根据这个方法,选民怎么.);正确例2: Croquet is a popular lawn game - players hit wooden balls through wire arches called wickers.(A) when (B) which (C) is when (D) in which分析:空格前后都是完整的句子,空格处缺定语从句引导词,由此首先排除(A)和(C)。但是到底是选择B还是D,则看从句,从句是完整的句子,那么一定选择D, 关系代词which 前应该有介词。六、in that结构在表示“原因”概念的引导词中,because of +名词,consequently是副词而“in that”是原因状语的引导词。例1:Mercury differs from other industrial metals _ it is a liquid.(A) whereas (B) in that (C) because of (D) consequently分析:空格前后都是完整的句子,空格处显然缺从句引导词。C、D不能引导从句,可以首先排除。根据题意,两个句子之间是因果关系而不是对比关系,故选(B)。in that为复合连词,用来引导原因状语从句。例2:Hovercraft, or air-cushion vehicles, are unusual _travel over land and water on a layer of air.(A)they (B)in they (C)that they (D)in that they分析:空格处缺从句引导词和从句主语。A和B缺从句引导词,首先被排除。C一般作宾语从句或定语从句,而句中需要的是状语从句,故也排除。D中in that为连词,引导表原因的状语从句,符合题意(气垫船之所以不同,是因为),故选D。这里我们再重申一下,如果选项中出现“介词+which”或者“in that”,那么首先考虑这个选项,如果后面使用的是完整的句子结构,那么这个选项就一定是答案。这种题目平时出现的不多,但是要考的话一定就是重点。例3:Emily Dickinsons garden was a place_great inspiration for her poems.(A) that she drew (B) by drawing her (C) from which she drew (D) drawn from which分析:首先看选项C, “介词+which”, 而后面是she drew great inspiration for her poems.是一个完整句子,那么选项C就是答案。七、what 结构 what结构在95.8以后的新题中考的非常多,记住一点: what=the thing that例1:The chief foods eaten in any country depend largely on_best in its climate and soil.(A) it grows (B) what grows (C) does it grow (D) what does it grow分析:空格前有depend on这个短语,四个选项都是句子,故可判断出空格处为宾语从句。A和C没有从句引导词,故排除,(D)的语序有问题,从句不能用特殊疑问句的倒装形式,故(B)正确。例2:During the eighteenth century, Little Turtle was chief of the Miami tribe whose territory became_is now Indiana and Ohio.(A) there (B) where (C) that (D) what分析:空格处缺的词既要引导从句又要作从句主语。四个选项中只有D符合条件。八、同位语结构同位语考试形式一:名词作主语,主语同位语_,_ _,_(注意是两个逗号)例1:The tongue , _, is an important aid in chewing and swallowing .(A) is the chief organ of taste (B) tasting the organ chiefly (C) the chief organ of taste (D) the organ chiefly tastes分析:空格处显然缺定语或同位语。句中已有谓语动词is, 故先排除A和D。(B)不合题意,故也可排除。(C)是名词短语,适合作主语的同位语,使句子完整,句意正确,故选(C)。同位语考试形式二:名词作主语,后面的名词是主语同位语,解释说明后面的名词_, _(注意是一个逗号)例2:A prolific writer of prose and verse, -of Native Americans in her novel, Century of Dishonor.(A) Helen Hunt Jackson took up the cause (B) the cause taken up by Helen Hunt Jackson(C) was Helen Hunt Jacksons cause (D) the cause that Helen Hunt Jackson took up.分析:空格前为名词短语,空格后为介词短语,空格处明显缺主语和谓语动词。根据空格前名词短语的意思判断,主语应该是人名而不是指物的名词,故选(A)。例3:Often very annoying weeds ,_and act as hosts to many insect pests.(A) that crowd out less hardy plants than goldenrods (B) crowding out less hardy plants by goldenrods(C) the goldenrods crowding out of less hardy plants (D) goldenrods crowd out less hardy plants分析:空格后面是and, 句中缺少与and并列的谓语动词。A只有从句没有主句; B,C分别是分词和名词短语, 无法与动词act并列; D 包含主语的同位语goldenrods和谓语动词crowd。同位语考试形式三:主谓宾后面出现一个名词,那么名词可以作宾语或者表语的同位语例4:An Olympic marathon is 26 miles and 385 yards, approximately_ _from Marathon to Athens. (A) the distance is (B) that the distance is (C) is that the distance (D) the distance 分析:逗号前为完整的句子,后面如果再接句子一定要有连接词或者从句引导词。A、B、C均为主谓结构,但都没有从句引导词,故排除。D是名词短语作表语同位语,故选(D)。、比较结构比较结构中要注意两点:1、倒装性;2、对称性例1:Western Nebraska generally receives less snow than_eastern Nebraska.(A) does (B) in (C) it does in (D) in it does分析:than引导比较状语从句,空格后面是个专有名词,肯定是比较从句的主语,空格处明显缺从句的谓语动词,只有(A)符合条件,故选(A)。注意than eastern Nebraska does 是正确的语序,但是原文中使用了倒装;在比较结构的后面部分中,如果比较从句的主语长,谓语动词短,动词可放到主语前面进行到装。例2: Hot objects emit_do cold objects. (A) rays more than infrared (B) rays are more infrared than (C) more than infrared rays (D) more infrared rays than 分析:emit为及物动词,空格处缺宾语和引导比较从句的than, 只有(D)符合条件。注意空格后为倒装形式,do代替emit以避免重复。此题为常考的句子结构。比较结构中还需要注意相互比较的必须属于同一种事物例例3:The activities of the international marketing researcher are frequently much broader than_.(A) the domestic marketer has (B) the domestic marketer does (C) those of the domestic marketer (D) that which has the domestic marketer分析:本题还是考查比较句,由于谓语动词是系动词are, 故先排除与其不对应的以has和does结尾的(A)和(B)。选项D则语义不清,也可排除。C中those代替前面提到的activities以避免重复,those一定要具备,因为只有这样才能满足比较的都是activities,谓语动词are因与主句谓语动词相同而被省略,因此C为正确答案。例4:The annual worth of Utahs manufacturing is greater than -.(A) that of its mining and farming combined (B) mining and farming combination (C) that mining and farming combined (D) of its combination mining and farming分析:本题为比较句,一般来说,比较的双方应属于同一类事物。句中主语显然是比较的一方,而空格处应是与之相对应的另一方。(B)、(C)、(D)均无法与the annual worth相对应,故可以排除。(A)中代词that代替 the annual worth, 是英语中常见的避免重复的用法,故选(A)。十、定语从句省略结构关系代词在定语从句中做宾语时可以省略例1:Most crocodiles will eat anything-capture and overpower.(A) can (B) they can (C) which can (D) and分析:空格前是个完整句子,空格后是两个并列的及物动词,后面却没有宾语,由此可推断出空格处缺能作从句宾语的从句引导词和从句主语。(A)、(D)没有从句引导词,可首先排除。(C)有从句引导词,也可作从句的宾语,却没有从句主语。正确答案(B)看似没有从句引导词,实际上是省略了引导词that,故选(B)。that they can capture, that引导定语从句在句子中做capture的宾语。例2:A majority of people in the United States can get all the calcium their bodies-from the food they eat.(A) require (B) requires (C) requiring (D)to require分析:此题显然缺从句谓语动词,故首先排除(C)和(D)。(B)为第三人称单数形式,与主语bodies相矛盾,故也可排除,因此选择A。 their bodies require from the food they eat是定语从句修饰calcium, 省略了that; 实际上they eat也是定语从句省略了that修饰the food“介词+名词”在定语从句中做表语时,关系代词和be动词可以同时省略,剩下的形容词短语做名词的后置定语。十一、状语从句省略结构 Metals expand when they are heated. Metals expand 是主句;when they are heated 是状语从句。但是这个状语从句中可以省略掉they are, 句子变成:Metals expand when heated. 但是并不是所有的状语从句都可以这么省略。这种省略从句主语的方式理论上需要满足以下两个条件:第一、从句主语和主句主语必须保持一致;第二、从句的谓语必须是be动词,主语和be动词同进同出,上面的they和are要么同时省略,要么同时保留。例1:Although_rigid, bones exhibit a degree of elasticity that enables the skeleton to withstand considerable impact.(A) apparently (B) are apparently (C) apparently their (D) are they apparently分析:连词although通常引导主谓完整的状语从句,当从句主语与主句主语相同、从句谓语又为系表结构时,则可省略主语和连系动词,故正确答案为(A)。Although apparently rigid = Although bones are apparently rigid, 注意bones和are必须同时省略。因此,我们从上面的例题中来分析一下填空题中状语从句省略以后的形式:though, although, even thought, while, If, when等为引导状语从句的词;这些词后面一定+形容词(分词),主句(注意逗号的后面是主句,前面是从句)例2:All marble is composed of crystals of the minerals calcite or dolomite, _, are perfectly white.(A) when, pure which (B) when, which pure (C) which, pure when (D) which, when pure分析:空格前是个完整的句子,空格后是系表结构,空格处显然缺非限定性定语从句的引导词兼作从句主语。(A)、(B)不引导非限定性定语从句,可首先排除。(C)中的pure和when位置错了,故选(D)。注意when pure是插入语,同时也是省略用法when they are pure;which are perfectly white, 状语从句省略结构,例3:_relatively costly, the diesel engine is highly efficient and needs servicing infrequently(A) Even (B) It is (C) Even though (D) There is分析:B和D填入后,都是构成两个主句;Even though则引导状语从句,even though it is, 这里it is 已经省略。十二、动词ing+名词的复数作主语结构这是一个比较难的结构,因为许多同学经常混淆动名词和现在分词。现在分词相当于形容词,和后面的名词是修饰与被修饰的关系;动名词是相当于具有动词特征的名词,和后面的名词是动宾关系。那么如何在句子中判断动名词和现在分词呢?我们来看两个例子:Doing exercises is a good habit. 做练习是一个好习惯。The starring troops have to surrender. 第一个句子强调的是做,而不是练习,不能说练习是一个好习惯,只能说做练习是一个好习惯,因此do是中心词,它和后面的名词是动宾关系,那么这个do就是动名词; 第二个句子说挨饿的军队必须投降,是军队投降,而不是挨饿要投降,因此中心词是troop,starring是来修饰troop的,因此starring是现在分词。在“动词ing+名词的复数”作主语结构的句子中,谓语动词是系动词is例1:_by transferring the blame to others is often called scapegoating.(A) Eliminate problems (B) The eliminated problems(被消除的问题)(C) Eliminating problems (D) Problems are eliminated分析:空格处缺主语。(A)不能作主语,(B)的名词为复数,与后面谓语动词相矛盾,(D)使句子出现两个谓语,故排除。(C)构成动名词短语,可作句中主语,故选(C)。这个题目的意思是通过把责任转嫁给别人,这种消除问题的方式,通常叫做替罪羊。例2:_wooden buildings helps to protect them from damage due to weather.(A) Painting (B) Painted (C) The paint (D) By painting分析:从谓语动词helps可判断出主语不可能为buildings, 因为主谓语在数上不一致,故空格处缺构成单数的词。四个选项中只有动名词painting符合这一条件,故选(A)。(B)构成复数名词短语,(C)无法与后面的名词连接,(D)构成介词短语,不能作主语,三个选项都可排除。 painted wooden buildings 被油漆的房子,中心词是buildings, 后面help不能用单数 painting wooden buildings油漆房子这件事情,中心词是painting例3:Scientists think _helps some tree to conserve water in the winter.(A) when losing leaves (B) leaves are lost (C) that losing leaves (D) the leaves losing分析:这道题目大家都能够选择C, 但是我们必须彻底理解C为什么正确,think that后面是宾语从句。losing是及物动词,丢弃叶子帮助树来保持水分,要注意不是树叶来帮助保持水分,而是丢弃树叶这个动作来保持水分。丢弃叶子是树主动丢弃,因此losing是动名词。十三、make结构 make结构即为:make +sth.(宾语) +possible+(宾语补足语)共有三种形式:make it possible+to do make it possible+that引导的从句make possible sth (这个sth一定很长,它后面有一个后置定语)做题技巧:如果possible后面有to do 或者that引导的定语从句, 中间一定有it 如果possible后面有名词,中间一定没有it例1:X-rays are able to pass through objects and thus make_details that are otherwise impossible to observe . (A) it visible (B) visibly (C) visible (D) they are visible 分析:此题考动词make的一种用法,visible后面有名词,因此中间不能有it,选择C;可以看到空格后that引导的是定语从句,visible是宾语补足语,宾语补足语的存在是因为宾语太长了,details是宾语。例2:Using many symbols makes_to put a large amount of information on a single map. (A) possible (B) it possible (C) it is possible (D) that possible 分析:从四个选项可以判断出本题考make的一种惯用法。首先排除明显的错误选项:C为句子,却没有与主句相连的连词,D中that后面应有主语并构成结构完整的从句。 由于后面是动词不定式,因此possible前面一定有it, it作形式宾语,故B正确。十四、the more the more结构这个结构的意思是“越.越”,结构一共有三条规则: 1. the more后面的名词必须使用冠词或者所有格, 新题专门考这条规则2. the more 后面的谓语如果是be动词的话,可以省略,例如上面的例题3. 第二个the more 后面可以使用倒装,而第一个后面却不行 the more, the more其实是原因状语从句,前面是原因,后面是结果,倒装句中必须是主句倒装,从句绝对不能够倒装。例1:The stronger_magnet, the greater the number of lines of magnetic force. (A) of (B) the (C) is the (D) is of the 分析:本题显然考查”the more the more”结构,the more后面的名词必须使用冠词或者所有格,因此只能选择B例2:The less the surface of the ground yields to the weight of the body of a runner, _to the body. (A) the stress it is greater (B) greater is the stress (C) greater stress is (D) the greater the stress 分析:正确答案为D。此题考the more the more句型,只有D符合这一句型的要求,故选D。十五、表示结果的伴随状语结构主谓宾完整的句子后面,如果出现两个词,thereby或者thus, 那么这两个词后面必须使用现在分词,表示“从而怎么样”的意思,这便是表示结果的伴随状语结构。但是必须注意并不是thus后面就是加doing,必须是前面一个完整的句子才对。例1:The Smithsonian Institution preserves more than sixty-five million items of scientific, historical, or artistic interest, _winning the popular title, “attic of the nation.” (A) however (B) thus (C) and (D) moreover 分析:逗号前面是个完整的句子,逗号后面是现在分词短语作状语表示结果。四个选项中只有thus一词可直接放在现在分词前面,故选B。thus 副词,修饰分词winning, 伴随状语例2: Snow aids farmers by keeping heat in the lower ground levels, thereby_from freezing. (A) to save the seeds (B) saving the seeds (C)which saves the seeds (D) the seeds saved 分析:thereby和to有意思重复,所以不能够选择(A), 后面应该跟现在分词,答案为B十六、形容词最高级省略结构 The crane is the tallest bird of the wading birds. 最高级后面的名词与范围名词重复,可以省略,句子变为The crane is the tallest of the wading birds.例1:The crane is_of the wading birds. (A) the tallest (B) the tallest that is (C) which is the tallest (D) which the tallest is 分析:空格前是主语和谓语,空格后是of引导的介词短语,空格处明显缺作表语的名词或名词短语。四个选项中只有(A)使句子结构完整,语义清楚,故选(A)。
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