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1、 連詞 一、連詞主要包括并列連詞和從屬連詞。在句子中,連詞起連接詞與詞、短語與短語及句子和句子的作用。它本身在句子里不單獨(dú)做句子成分。連詞,是一種虛詞,不能擔(dān)任一個(gè)句子成分,但可以起連接的作用,即連接詞與詞或句與句。例如:we may be leaving today or tomorrow. now i must go or i shall be late for the party. 二、連詞的種類 連詞有兩類:1)從屬連詞:引導(dǎo)從句。隨著從句作用不同,它們又可分為幾類:從句種類主要從屬連詞從句種類主要從屬連詞時(shí)間從句when,while,as before,aft
2、er,until,till,whenever原因從句because, as, since條件從句if, unless, supposing suppose讓步從句although,though even,though(if) while目的從句in order that, so that 方式從句as like the way as if as though結(jié)果從句sothat, suchthat, so that so地點(diǎn)從句where, wherever比較從句than as此外還有 that, whether 等從屬連詞可引導(dǎo)名詞從句,在句中擔(dān)任主語、賓語等practice1. (201
3、1肇慶)can't understand this sentence _there are no new words in it.a:if b: because c:though d:as2. (2011)you'll be late _you don't get up early tomorrow morning a:if b: when c:before d:until 3. (2010廣東)hi,boys,please don't go back home _the rain stops,or you'll get wet.a:because b:
4、 since c:but d:until4. (2009深圳)_you go across the road ,you must be careful.a:since b: after c:when d:before2) 并列連詞:連接兩個(gè)互不依從的次、短語或分句:slow but sure. 要慢而穩(wěn)。(連接單詞)shell be back either this week or next week. 她將在這周或下周回來。(連接短語)i went and she went also. 我去了,她也去了。(連接分句)并列連詞有下面幾類:表示意思轉(zhuǎn)折的連詞b
5、ut yet however nevertheless表示因果關(guān)系的連詞for so therefore hence 其他并列連詞and or eitheror neithernor not onlybut also bothand as well as從屬連詞1. 引導(dǎo)時(shí)間狀語從句的連詞這類連詞主要有:(1)when: dont get excited when you talk. 講話時(shí)別激動(dòng)。when he got up he felt dizzy. 他站起身時(shí)感到頭暈。 (2)while:we must strike while the iron is hot. 我們要趁熱打鐵。whi
6、le she ate she grew more restless. 她一邊吃一邊變得更加忐忑不安。(3)as:as he spoke two men came up. 在他講話時(shí)兩個(gè)人走了進(jìn)來。he smiled as he passed. 他經(jīng)過時(shí)笑了笑。(4)before:look before you leap. 三思而后行。it will be five years before we meet again. 要五年后咱們才能再相見。(5)after:i arrived after he had left. 在他走后我到了。ill tell them after you have l
7、eft. 你走后我在告訴他們。(6)until, till :ill take no steps until you arrive. 你來之前我不會(huì)采取什么行動(dòng)。i propose waiting till the police get here. 我建議等警察來了再說。 (7)since:how long is it since you came to london? 你到倫敦有多久了?it was years since i had seen her. 我有好多年沒見到她了。(8)whenever:i go and visit him whenever im in town. 我每次進(jìn)城都
8、去看他。whenever possible, they play outside. 一有機(jī)會(huì)他們就到外面玩耍。練一練(2011河南)the baby is only one year old ,so he doesn't speak _write.a: and b:or c: so d: but (2011遼寧)she is listening to the music _he is washing clothes.a:after b:before c:while d:until 2. 引導(dǎo)條件狀語從句的連詞1)條件狀語從句主要由if, unless, supposing(suppos
9、e)引導(dǎo):i must leave if thats the case. he will come if asked. 。i wont write unless he writes first. ill go there tomorrow unless it rains. supposing that he asks you, will you go? supposing his plan goes wrong, what will you do then? suppose she finds out, what shall we do then? suppose you lost your
10、job tomorrow, what would you do? i will agree to go provided(providing) (that) my expenses are paid.she agreed to go and work there provided that her family could go with her.ill dry the dishes, providing that you do the washing-up. 2)條件狀語從句還有其他形式:you will always have a home as long as i have anythi
11、ng.theyll stand by you even if you dont succeed. 此外,as long as, so long as, in case, even if 都起連詞作用。3. 引導(dǎo)目的狀語從句的連詞,引導(dǎo)目的的狀語從句的連詞主要有下面這些:he left early in order that his children would not be alone in the house. i lent him 50 in order(so )that he might go for a holiday.ask her to hurry up with the lett
12、ers so that i can sign them.。please interpret this chinese womans remarks so that i can understand them.cant you fix it somehow so you could stay longer?ill give him a map so he wont get lost. she did it that he might go free. i am anxious to get done that i may be back in ireland. he hurried on, le
13、st she should meet him again. he hid the money lest it should be stolen. 4. 引導(dǎo)結(jié)果狀語從句的連詞1)結(jié)果狀語從句主要由sothat和suchthat 引導(dǎo):he was so young that you must excuse him. he was so fat that he couldnt get though the door.jim made such a noise that his sister told him to be quiet.he shut the window with such for
14、ce that the glass broke.they had such a fierce dog that no one dared to go near their house.that 有時(shí)可以省略,特別是在口語中。5. 引導(dǎo)原因狀語從句的連詞 1)引導(dǎo)原因狀語從句的連詞主要有because, as, since:because it was wet he took a taxi. he was worried because he hadnt had any letter from her.。as david had a passion for walking, we started
15、 off on foot. as youre sorry, ill forgive you. 2)還有一些表示原因的狀語從句由seeing(that),considering(that)或now that等引導(dǎo):please dont try to back out now that everything has been arranged.now youre here, you may make yourself useful. 3)許多用在形容詞后的that從句也起原因狀語的作用(that 有時(shí)可省略):she was glad that she had controlled hersel
16、f. im disappointed that they cannot come. 名師點(diǎn)撥連詞??嫉降挠幸韵聨讉€(gè)詞組:1. both .and:表示"兩者都.".注意:當(dāng)both.and 連接主語時(shí),后面動(dòng)詞一般要用復(fù)數(shù)。如:both lily and lucy are right.2.not only. but also: "不僅.而且."。注意:后面動(dòng)詞采用就近原則,與but also后的詞保持一致。如:not only my parents but also my brother likes the cat.3.either.or:"或
17、者.或者."。注意謂語動(dòng)詞采用就近原則。如:either you or i am wrong.4.neither.nor:"既不.也不." 是 "either.or" 的否定形式。謂語動(dòng)詞采用就近原則,與nor后的詞保持一致。如:neither you nor he is right.5.or的用法: 意思為"否則"。如:i must work hard, or i'll fail in the exam.(我必須好好學(xué)習(xí),否則我會(huì)考不及格了。)6.while, when, as這三個(gè)連詞都可引導(dǎo)時(shí)間狀語從句,但用法
18、有所不同。1) 當(dāng)某事正在進(jìn)行的時(shí)候,又發(fā)生了另一件事。while, when, as 都可用來引導(dǎo)表示“背景”的時(shí)間狀語從句。例如:as/when/while i was walking down the street i noticed a police car.2) 當(dāng)兩個(gè)長動(dòng)作同時(shí)進(jìn)行的時(shí)候,最常用的是while。例如:while mother was cooking lunch, i was doing my homework.3) 當(dāng)兩個(gè)動(dòng)作都表示發(fā)展變化的情況時(shí),最常用的是as。例如:as children get older, they become more and more
19、 interested in things around them.4) 當(dāng)兩個(gè)短動(dòng)作同時(shí)發(fā)生時(shí),或表示“一邊一邊”時(shí),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) 當(dāng)從句的動(dòng)作先于主句的動(dòng)作時(shí),通常用when。例如:when he finished his work, he took a short rest.6) 當(dāng)從句是瞬間動(dòng)作,主句是延續(xù)性動(dòng)作時(shí),通常用when。例如:when john arrived i was cook
20、ing lunch.7.as, because, since , for這四個(gè)詞都可表原因,但用法有區(qū)別。1) 如果原因構(gòu)成句子的最主要部分,一般用because。因此,because引導(dǎo)的從句往往放在句末。例如:i stayed at home because it rained.-why arent you going?-because i dont want to.2) 如果原因已被人們所知,或不如句子的其它部分重要,就用as或since。since比as稍微正式一點(diǎn)。as和since 引導(dǎo)的從句一般放在句子的開頭。例如:as he wasnt ready, we left withou
21、t him.since i have no money, i cant buy any food.3) for用來補(bǔ)充說明一種理由,因此,for引導(dǎo)的從句幾乎可以放在括號(hào)里。for引導(dǎo)的句子不放在句子的開頭。例如:i decided to stop and have lunch-for i was feeling quite hungry.8.if, whetherif和whether都可作“是否”講,在引導(dǎo)賓與從句是一般可互換。例如:i wonder whether (if) you still study in that school.i dont know whether (if) he
22、 likes that film.在下列情況下,只能用whether,不能用if:1) 引導(dǎo)主語從句時(shí)。例如:whether he will come to the party is unknown. 2) 引導(dǎo)表語從句時(shí)。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.9.sothat, such.that1) sothat中的so是個(gè)副詞,其后只能跟形容詞或副詞,而such.that中的such是個(gè)形容詞,后接名詞或名
23、詞短語。例如:im so tired that i cant walk any farther.it was such a warm day that he went swimming.2) 如果在名詞之前有many, much, little, few時(shí),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 black and blue all over.10.although, but這兩個(gè)連詞不能用在同一個(gè)句子中。例如:我們不能說
24、“although he is over sixty, but he works as hard as others.”這個(gè)句子應(yīng)改為:although he is over sixty, he works as hard as others.或he is over sixty, but he works as hard as others.11.because, so這兩個(gè)連詞同樣不能用在同一個(gè)句子中。例如:我們不能說“because john was ill, so i took him to the doctor.” 這個(gè)句子應(yīng)改為because john was ill, i took
25、 him to the doctor.或john was ill, so i took him to the doctor.考點(diǎn)精練1. usually we don't realize how important nature is to us_ it is too late.a. unless b. until c. if d. after2go to bed early,_ you won't get up on time next morning. athen band cbut dor3tony is a clever boy,_ he usually fails i
26、n chinese exams.aso bbut cor d. because4. could you please give me your e-mail address _ you go? a. as soon as b. before c. after d. until5. don't get off the bus _ it has stopped .a. until b. if c. to d. for6. he met many problems _ he was going over his lessons .a. before b. as soon as c. sinc
27、e d. while7. we have been good friends _ we joined the same ping-pong team.a. after b. before c. since d. until8. my brother is going to look for another job_the company offers him more moneya. after b.when c unless dbesides9. i didn't know he came back _ i met him in the street.a. since b. when c. until d. after10. -look! here comes our school bus.-no hurry. don't get on it _it has stopped.a. until b. after c. since d. when11. when someone is ill,
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