初中英语连词(共7页).doc
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1、精选优质文档-倾情为你奉上初中英语语法连词教学目标:掌握连词的用法,在写作中能够灵活运用。教学重点:1、并列连词的用法2、从属连词的用法3、相似连词的辨析教学难点:连词之间的意义及辨析(一)连词概述连词是连接单词、短语或句子的一种虚词。在句中不单独作句子成分。历年中考中常考并列连词and,but,neither nor;从属连词now that,though,when。所以了解状语从句和宾语从句的真正意义有助于正确使用从属连词。(二)基础知识梳理1并列连词用来连接彼此并列的词、短语或句子。并列连词有and,or,but,so,for,nor等。2关联连词有bothand,either or,n
2、eithernor,not onlybut also,as well as,as much as等。3连接性副词有however,therefore,besides,yet,anyway,still,all the same等。4并列连词和连接性副词存在以下的区别:1)连接两个独立的分句时,并列连词的位置只能放在它所引导的分句的句首,前面通常有逗号。如:I must work hard, for I still have a long way to go.They all went, but I didnt go.2)连接性副词的位置比较灵活,句中、句首、句末都可以。但是放在句首较为普遍。如:
3、Mother was ill, therefore, she stayed at home yesterday.= Mother was ill, she therefore, stayed at home yesterday.= Mother was ill, she stayed at home yesterday, therefore.3)两个并列连词不可以连用。如:He tried hardand but he failed to get the job.此句中的but应改为yet。因为and和but都是连词。5从属连词是用来引导从句,如宾语从句、状语从句、定语从句等。从属连词有tha
4、t, if, unless, whether, who, whose, what, which, where, than, when, while, as, since, though, although, because, before, after, until, as soon as, now that, so.that, so that, as. as,(not) as/soas 如:If it snows tomorrow,we wont go on a picnic.(If引导条件状语从句)Could you tell me whose PC it is? (whose引导宾语从句
5、)The man who is talking to my class teacher is my father.(who引导定语从句)连词的功能用来连接词,短语,从句或句子的词叫连词。连词是一种虚词,在句中不能单独使用。连词可分为两类:并列连词和从属连词。5. 并列连词并列连词用来连接具有并列关系的词,短语或句子。常见的并列连词有:(1)表并列关系的and, bothand, not onlybut also, neithernor等。(2)表选择关系的or, eitheror等。(3)表转折关系的but, while等。(4)表因果关系的for, so等。6. 从属连词从属连词用来引导从句
6、。常见的从属连词有:(1)引导时间状语从句的after, before, when, while, as, until, till, since, as soon as等。(2)引导条件状语从句的if, unless等。(3)引导原因状语从句的because, as, since等。(4)引导目的状语从句的so that, in order that等。(5)引导让步状语从句的though, although, even if等。(6)引导结果状语从句的so that, sothat, suchthat等。(7)引导比较状语从句的than, asas等。(8)引导名词从句的that, if ,
7、 whether等。7. 常用连词的用法辨析(1) while, when, as这三个连词都可引导时间状语从句,但用法有所不同。1) 当某事正在进行的时候,又发生了另一件事。While, when, as 都可用来引导表示“背景”的时间状语从句。例如:As/When/While I was walking down the street I noticed a police car.2) 当两个长动作同时进行的时候,最常用的是while。例如:While mother was cooking lunch, I was doing my homework.3) 当两个动作都表示发展变化的情况时
8、,最常用的是as。例如:As children get older, they become more and more interested in things around them.4) 当两个短动作同时发生时,或表示“一边一边”时,最常用as。例如:Just as he caught the fly, he gave a loud cry.She looked behind from time to time as she went5) 当从句的动作先于主句的动作时,通常用when。例如:When he finished his work, he took a short rest.6
9、) 当从句是瞬间动作,主句是延续性动作时,通常用when。例如:When John arrived I was cooking lunch.(2)as, because, since , for这四个词都可表原因,但用法有区别。1) 如果原因构成句子的最主要部分,一般用because。因此,because引导的从句往往放在句末。例如:I stayed at home because it rained.-Why arent you going?-Because I dont want to.2) 如果原因已被人们所知,或不如句子的其它部分重要,就用as或since。Since比as稍微正式一点
10、。As和since 引导的从句一般放在句子的开头。例如:As he wasnt ready, we left without him.Since I have no money, I cant buy any food.3) for用来补充说明一种理由,因此,for引导的从句几乎可以放在括号里。For引导的句子不放在句子的开头。例如:I decided to stop and have lunch-for I was feeling quite hungry.(3)if, whetherif和whether都可作“是否”讲,在引导宾与从句是一般可互换。例如:I wonder whether (
11、if) you still study in that school.I dont know whether (if) he likes that film.在下列情况下,只能用whether,不能用if:1) 引导主语从句时。例如:Whether he will come to the party is unknown. 2) 引导表语从句时。例如:The question is whether I can pass the exam.3) 在不定式前。例如:I havent made up my mind whether to go there or not.(4)sothat, such
12、.that1) sothat中的so是个副词,其后只能跟形容词或副词,而such.that中的such是个形容词,后接名词或名词短语。例如:Im so tired that I cant walk any farther.It was such a warm day that he went swimming.2) 如果在名词之前有many, much, little, few时,用so,不用such。例如:He has so little education that he is unable to get a job.I have had so many falls that I am b
13、lack and blue all over.(5)eitheror, neithernor, not onlybut also这三个连词词组都可连接两个并列成分。当它们连接两个并列主语时,谓语动词要随相邻的主语变化。例如:Either you or he is wrong.Neither he nor his children like fish. Not only the teacher but also the students want to buy the book.(6)although, but这两个连词不能用在同一个句子中。例如:我们不能说“Although he is ove
14、r sixty, but he works as hard as others.”这个句子应改为:Although he is over sixty, he works as hard as others.或He is over sixty, but he works as hard as others.(7)because, so这两个连词同样不能用在同一个句子中。例如:我们不能说“Because John was ill, so I took him to the doctor.” 这个句子应改为Because John was ill, I took him to the doctor.
15、或John was ill, so I took him to the doctor.【现场练兵】I.选择填空( )1. LiMeng passed his mother his cup _ asked for some more tea. A. but B. or C. and D. if( )2. Study harder, _ you will fall behind others. A. and B. or C. but D. so( )3. The doctors are very tired, _ they are still working very hard. A. but B
16、. if C. only D. when( )4. _ you come back, please let me know. A. Later B. Until C. As D. As soon as( )5. He told us _ he was over eighty years old. A. where B. then C. if D. that( )6. Dont go home _ you have cleaned the classroom. A. by B. then C. only D. until( )7. _ Sunday _Monday is OK. Ill be f
17、ree during those two days. A. Neithernor B. Eitheror C. Bothand D. Either and( )8. We havent seen him _ he left last year. A. since B. when C. as D. if( )9. Its raining now, _ you must take the raincoat with you. A. for B. so C. or D. because( )10._you work harder, youll do better in your subjects.A
18、. If B. Before C. Already D. Whether( )11._I was ill yesterday, I didnt come to school.A. For B. As C. Because D. Since( )12.The old man was _ pleased _he could not say a word.A. eitheror B. neithernor C. not onlybut also D. sothat( )13.Which is bigger, the sun _the earth?A. but B. or C. and D. nor
19、( )14. Could you tell us _you grow apples in your country? A. that B. whether C. which D. what( )15.He knew nothing about the accident _ his friend told him.A. if B. since C. until D. because( )16.Please answer the question in a loud voice _all the class can hear you.A. so that B. sothat C. though D
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