初三英语语法知识点专题讲解练习----连词一.概念连词是用来连接词,短语,从句或句子的词.连词在句子不能独立充当句子的成分。

.二.知识点精讲(按语法含义分类)(一）并列连词有and, or, but, for, both, either, etc.1．“and”用来连接对等的句子，短语或句子Sam enjoys tennis, table tennis and basketball.The weather became colder and colder.He stood up and went out of the classroom.注意：祈使句后连接and,有条件句作用。

Go straight on, and you'll see the library.=If you go straight on, you'll see the library.2．表示选择关系，有：or, either…or…,whether… or…等。

(“or”作“或、否则”之意)1)祁使句后连接or ，表“如果…,否则…”,有转折的意思，此时or =if you don’t …,you’ll …Hurry up, or you’ll be late.=If you don’t hurry up, you’ll be late.2)either…or…:或者…或者…; 不是…就是…；要么…要么…a.either…or…连接两个并列主语时,谓语动词靠近哪个主语就与哪个主语保持“人称”和“数”的一致，即就近原则。

Either you or I am right.b.由either…or…引导的否定句是完全否定。

She isn’t either a student or a teacher.c.whether…or…不管…还是…She is always cheerful, whether at home or at school.3．表示转折关系，有：but, however, yet, still，while等。

but表示转折，while表示对比。

(1.although、though 不可以与but 连用，但是可以与yet和still连用, 2. not … but 不是…而是)Mary was a nice girl, but she had one shortcoming.Tom got up early, yet he failed to catch the train.He was very tired, still he kept on walking.Your composition is fairly good, however, there is still some room for improvement.Jane is hard working ,while her sister is quite lazy.4.both… and : 既…又（连接主语为复数）neither…nor: 既不…也不either…or: 或者…或者连接两主语后者决定单、复not only … but also:不但…而且5.表示因果关系，有：for(因为)，so(所以)。

He is not at school today, for he has a bad cold.It was late, so I went home.（二）.从属连词的用法：1.引导时间状语从句，有：before, after, when, while, as, till, until, since, as soon as等。

After they had planted their crops, they took a rest.We have learned six lessons since he began to teach us.As soon as he gets to Beijing, he’ll call me.1) w hen, while, as 都表示“当……时”，when从句谓语动词既可以是瞬间动词也可以是延续性动词，可用于主从句动作同时发生或从句动作先于主句动作发生。

while从句谓语动词只能是延续性动词，侧重主从句动作同时发生。

as引导一个持续性动作，多用于主从句动作同时发生，强调“一边……一边”。

When I came in, my father was cooking.I came in when/while my father was cooking.He sang as he walked.2)until用法：1.当主句谓语动词是延续性动词时，主从句都用肯定式，译为“直到……为止”(do sth until...)；当主句谓语动词是瞬间时，主句用否定式，从句用肯定式，即not…..until, 译为“直到……才”。

Until=till (till不能放在句首）Mr. Green waited until his children came back.(格林先生一直等到他的孩子们回来)Mr. Green didn’t go to bed until his children came back. (格林先生直到他的孩子们回来才睡觉)2. 引导条件状语从句，有：if(如果), unless(除非，如果……不)等。

If you don’t go soon, you’ll be late.=Unless you go soon, you’ll be late.3.引导原因状语从句，有because, as, since等。

because“因为”语气最强,回答why提问时只能用because，其引导的从句可放在句首或句末；as“由于”、since“既然”语气不如because强，引导的从句常置于句首；for是并列连词，不能置于含两个并列分句的句子的句首，只能将其放在两个分句中间。

He didn’t go to school because he was ill.As it was raining, we went there by bus.Since everybody is here, let’s begin.It must have rained last night, for the ground is wet.注意：because与so不能同时使用。

8.引导让步状语从句，有：although/though(虽然，尽管), even though/if (即使)Although/ Though it is a very young country, it is very rich.Even if/ though you were here yesterday, you couldn’t help him.注意：although/though 引导的从句不能与but连用，但可与yet, still连用。

9.引导目的状语从句，有so that和in order that(以便，为了)等。

The teacher spoke loudly so that /in order that we could hear him clearly.10.引导结果状语从句，有：so that(结果是)和so/such…that…(如此…以至于)等。

so…that与such…that之间的转换既为so与such之间的转换。

比较so和such 其规律由so与such的不同词性决定。

such 是形容词，修饰名词或名词词组，so 是副词，只能修饰形容词或副词。

so 还可与表示数量的形容词many，few，much，little连用，形成固定搭配。

so + adj.such + a(n) +adji+ n.so + adj. + a(n) + n.such + adj+n. (pl.)so + many(few) adj. + n. (pl.)such +n. (pl.)/such+a(n)+n.so + much(little) adj. + n. [不可数]such +adj+n. [不可数]It was very cold, so that the water in the bowl froze.He got there so early that he got a good seat.It is such a heavy box that nobody can move it.11.引导比较状语从句，有：as…as…(与……一样),not as/so… as…(不及，赶不上),和than(比)等。

I know you better than she does.He works as carefully as she.I can’t run as/so fast as you.12.引导名词性从句，有：that和if/whether(是否)等。

We know that the earth goes around the sun.(宾语从句)I wonder if he has received my e-mail. (宾语从句)注意：在时间状语从句和条件状语从句中，如果主句是将来时，从句要用一般现在时。

I’ll go on with the work when I come back tomorrow.★连接性副词:however，therefore，besides,moreover, what’s more，otherwise，anyway，instead, anyway, as a result等。

★阅读中常见关联词：as if 犹如，好似as though 好像；仿佛as well as也；和…一样；不但…而且even though虽然，即使even if即使；虽然ever since adv. 从那时到现在now that既然；由于yet conj. 但是；然而adv. 还；但是；已经anyway adv. 无论如何，不管怎样；总之all the same仍然still conj. 仍然；但是；尽管如此rather than 而不是；宁可…也不愿中考模拟题：类型一：考察并列连词：1、I don’t like reading watching TV. What about you? “I don’t like reading all day, I like watching TV play s.”A.and, but B．and, and C．or, and D．or, but2、We bought Granny a present, she didn’t like it.A. but B．and C．or D.so3、He is only ten months. He can read write.4、She said she might come Saturday Sunday5、If Tom Mike asks for their car, tell him to come tomorrow.6、My shoes are worn out, I need new ones.类型二：考察从属连词：1、You won’t know the value(价值) of the health you lose it.2、It was already ten o’clock we got to the museum this morning.3、It’s a long time we met last.4、I’ll give her the message she comes back.5、the teacher came into the classroom, many students were talking to each other.6、People often mistake us for each other we are twins.7、Read the sentences slowly we can understand what you read.1. —Oh, I failed again—Don’t lose heart. One more effort, ________ you will succeed.A. so thatB. thereforeC. howeverD. and2. _______a difficult situation, so you should send him a message and give him some advice.A. As he is inB. He is inC. Being inD. He being in3. She said she would work it out herself, ________ ask me for help.A. and not toB. but notC. and prefer notD. rather than4. ________ enough time, but I couldn’t do it better.A. I was givenB. GivenC. To be givenD. Though I was given5. —How can I wake up so early? —Set the alarm at 5 o’clock, ________ you’ll make it.A. butB. orC. andD. so6. For a person with reading habits, a printed page contains not only words ____ ideas, thoughts and feelings.A. yetB. andC. orD. but7. Information technology is taught in most schools, ________ we have entered the information society.A. soB. whileC. stillD. for8. English is understood all over the world ______ Turkey is spoken by only a few people outside Turkey itself.A. whileB. whenC. ifD. as9. I was on the point of going to bed ________ Mr. Zhang rang.A. asB. whenC. whileD. and10. I asked him whether he had done all the work himself ________ whether he had had any assistance.A. andB. butC. norD. or11. In some countries, ______are called “public schools” are not owned by the public.A. whichB. asC. whatD. that12. ________ happens in the world makes us happy and sad by turns.A. ThatB. WhatC. WhichD. Whether13. I read about this story in some book or other, does it matter ________ it was?A. whereB. whatC. howD. which14. One of the men present held the view ________ the book said was right.A. what thatB. whatC. thatD. that what15. ________ I had walked for six hours, I was tired out.A. AfterB. BeforeC. WhenD. As16. Tom make up his mind to get a seat for the football match ________ it means standing in a queue all night.A. as ifB. as thoughC. even ifD. whatever17. The roof fell ________ he had time to dash into the house to save his baby.A. asB. afterC. untilD. before18. Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes to classroom tests.A. asB. sinceC. whenD. after19. I have been keeping that photo ________ I can see it every day, as it always reminds me of my college days.A. whichB. whereC. whetherD. when20. You may borrow this book --- ________ you promise to give it back.A. in caseB. so long asC. as ifD. even if21. ________ the man grew older, he lost interest in everything except gardening.A. WithB. SinceC. WhileD. As22. ________ you understand this rule, you’ll have no further difficulty.A. OnceB. UnlessC. AsD. Until23. I had no sooner got back to the kitchen _______ the door-bell rang loud enough to wake the dead.A. whenB. thanC. asD. while24. I criticized him, you know, not ________ I hate him but ________ I love him.A. because; becauseB. because; forC. for; becauseD. for; for25. ________ he studies hard, he will never pass the examination.A. IfB. UnlessC. Even ifD. Even though26. She worked hard _____ everything would be ready by the time he came back.A. sinceB. so thatC. as ifD. unless27. He waited ________ the volcano became quiet and he was able to return two days later.A. whenB. beforeC. asD. until28. — May I go and play football with Dick this afternoon, Dad? — No, you can’t go out ________ your work is being done.A. beforeB. untilC. asD. after29. A warning news report from Qatar announces that a group of Islam will continue to kill Americans wherever they are _____ ___ they leave the Arab world forever.A. even thoughB. in caseC. wheneverD. until30. I was so familiar with her that I recognized her voice ________ I picked up the phone.A. the momentB. afterC. beforeD. while。