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好了，现在我们再攻克词类的另一个堡垒——连词。
它在句中主要起辅助作用，用来连接词与词，短语与短语或句子与句子。根据其在句中所起的语法作用，连词主要分为并列连词和从属连词。
并列连词有：and, but, or, so, yet, however, for,then, both...and, not only...but also..., neither...nor..., either...or...等。如：
It must be done, however difficult it may be.
无论多么困难，这事非做不可。
Let's have a rest, for we're all tired.
我们休息一会吧，因为我们都累了。
从属连词有：when, after, before, while, until, since, as soon as, so that, such...that, though, if等。
The class stood up when the headmaster came in.
校长进来时，全班同学都站起来了。
As soon as she saw her son, she began to cry.
她一见到她的儿子，她就哭起来了。
下面我们重点讲几个常考的词组。连词常考到的有以下几个词组：
both...and...：表示“两者都……”.注意：当both...and... 连接主语时，后面动词一般要用复数。如：Both Lily and Lucy are right.
not only... but also...: “不仅……而且……”。注意：后面动词采用就近原则,与but also后的词保持一致。如：Not only my parents but also my brother likes the cat.
either...or...:“或者……或者……”
neither...nor...：“既不……也不……”
它们连接主语时，谓语动词采用就近原则。如：Either you or I am wrong. Neither you nor he is right.
So easy, not difficult at all! OK!
Let's come to our practice !
趁热打铁
1.____ John ____ I are policemen.
A. Neither...norB. Either...or
C. Both...andD. Not only...but also
2.Mr Smith teaches ____ well ____ his lessons are
not easily forgotten.
A. very; thatB. quite; but
C. so; as D. so; that
３.I didn't buy the dictionary yesterday ____ my aunt
would give me one.
A. until B. because C. ifD. before
４.Wait for me in the room _____ I come back.
A. untilB. and C. so D. or
５.The plane will take off ____ an hour. Please check
in right now.
A. at B. in C. on D. to
６.Go along the road, ____ you'll find the market
at the end of it.
A. whenB. andC. orD. though
７.You'll be late ___ you don't get up early tomor-
row morning.
A. if B. when C. before D. until
８.It was late. She washed her face ____ went to bed.
A. or B. and C. soD. but
９.The article is very important _____ it is short.
A. though B. soC. ifD. or
10.That baby is only three years old he can ____
read ____ write.
A. either...or B. neither...nor
C. as...asD. both...and
11.Hurry up,___ you'll be late for school.
A. andB. but C. or D. so
12.It was ___ work that I couldn't finish it on time.
A. so difficult B. such a difficult
C. so difficult a D. such difficult
它在句中主要起辅助作用，用来连接词与词，短语与短语或句子与句子。根据其在句中所起的语法作用，连词主要分为并列连词和从属连词。
并列连词有：and, but, or, so, yet, however, for,then, both...and, not only...but also..., neither...nor..., either...or...等。如：
It must be done, however difficult it may be.
无论多么困难，这事非做不可。
Let's have a rest, for we're all tired.
我们休息一会吧，因为我们都累了。
从属连词有：when, after, before, while, until, since, as soon as, so that, such...that, though, if等。
The class stood up when the headmaster came in.
校长进来时，全班同学都站起来了。
As soon as she saw her son, she began to cry.
她一见到她的儿子，她就哭起来了。
下面我们重点讲几个常考的词组。连词常考到的有以下几个词组：
both...and...：表示“两者都……”.注意：当both...and... 连接主语时，后面动词一般要用复数。如：Both Lily and Lucy are right.
not only... but also...: “不仅……而且……”。注意：后面动词采用就近原则,与but also后的词保持一致。如：Not only my parents but also my brother likes the cat.
either...or...:“或者……或者……”
neither...nor...：“既不……也不……”
它们连接主语时，谓语动词采用就近原则。如：Either you or I am wrong. Neither you nor he is right.
So easy, not difficult at all! OK!
Let's come to our practice !
趁热打铁
1.____ John ____ I are policemen.
A. Neither...norB. Either...or
C. Both...andD. Not only...but also
2.Mr Smith teaches ____ well ____ his lessons are
not easily forgotten.
A. very; thatB. quite; but
C. so; as D. so; that
３.I didn't buy the dictionary yesterday ____ my aunt
would give me one.
A. until B. because C. ifD. before
４.Wait for me in the room _____ I come back.
A. untilB. and C. so D. or
５.The plane will take off ____ an hour. Please check
in right now.
A. at B. in C. on D. to
６.Go along the road, ____ you'll find the market
at the end of it.
A. whenB. andC. orD. though
７.You'll be late ___ you don't get up early tomor-
row morning.
A. if B. when C. before D. until
８.It was late. She washed her face ____ went to bed.
A. or B. and C. soD. but
９.The article is very important _____ it is short.
A. though B. soC. ifD. or
10.That baby is only three years old he can ____
read ____ write.
A. either...or B. neither...nor
C. as...asD. both...and
11.Hurry up,___ you'll be late for school.
A. andB. but C. or D. so
12.It was ___ work that I couldn't finish it on time.
A. so difficult B. such a difficult
C. so difficult a D. such difficult