例一 Between the two generations, it is often not their age, ___ their education that causes misunderstanding.
A. like B. as
C. or D. but
例二 Reality is not the way you wish things to be, nor the way they appear to be, ____ the way they actually are.
A. as B. or
C. but D. and
例三They wanted to charge $ 5, 000 for the car , ______ we managed to bring the price down.
1. 连词从形式上说，有单个使用的词，如and，since等；有成对使用的词，如not only…but also，as…as等；还有两个以上的词组合而成的短语连词，如as well as，in order that等。
例一 A man cannot smile like a child, _____a child smiles with his eyes, while a man smiles with his lips alone.
A. so B. but
C. and D. for
例二 you have mentioned it，I’ll remember to look after your dog when you go traveling．
C．Now that D．Until
例三 ____I can see , there is only one possible way to keep away from danger.
A. As long as B. As far as
C. Just as D. Even if
答案B。as far as意为“据……”， “就……”，表示程度、深度等。
例一We called the First - Aid Center_______ the traffic accident happened.
答案A。immediately在这里做连词，相当于as soon as的用法，表示：“…立即就…”。
例二She came to the scene ______ she heard of the accident.
A．at the moment
C．for the moment
D．in a moment
答案B。the moment在这里做连词，相当于as soon as的用法，表示：“…即刻就…”。注意，在使用时the moment前不加介词，后不加连词，不能错误地表述为“at the moment when”
例三 _____the pain was bad, ______he did not complain.
A. Although; but
B. Though; but
C. Though; yet
D. Even; still
3. 连词从语法作用上说，有并列连词，即连接并列的词、短语或句子，表示并列、递进、转折、因果、选择等等，如and, but, or, nor, so, therefore, yet, however, nevertheless, for, as well as, both…and…, not only…but also…, either…or…, neither…nor…, and then等；
例一Stand over there you’ll be able to see it better.
A. or B. while
C. but D. and
例二 You have failed two tests. You’d better start working harder, ____you won’t pass the course.
A. and B. so
C. but D. or
例三—— I think George doesn’t really care for TV plays.
——Right, he still watches the program.
A. and B. but
C. or D. so
例四Unlike watching TV, reading is a highly active process ______ it requires attention as well as memory and imagination.
A. until B. but
C. unless D. for
例 A story goes ______ Elizabeth I of England liked nothing more than being surrounded by clever and qualified noblemen at court.
A. when B. where
C. what D. that
例 ________ we will build a new power plant hasn’t been decided yet.
A. If B. what
C. whether D. that
③连接特殊疑问句，表示“5W1H”的who, whose, what, how, where, when, why等。
例一 After Yang Liwei succeeded in circling the earth, ___ our astronauts desire to do is walk in space.
A. where B. what
C. that D. how
例二 You are saying that everyone should be equal, and this is ______I disagree.
A. why B. where
C. what D. how
例三Parents are taught to understand ____ important education is to their children’s future.
A. that B. how
C. such D. so
④还有连接事实，表示“无论…”的连词whatever, whenever, wherever, however,
例一 ______is worth doing and should be done well.
A．No matter what
B．No matter whatever
答案C。特别提醒：注意在名词从句中，不能将Whatever“打开”成No matter whatever，因为No matter whatever只引导状语从句，而Whatever既可以引导名词从句，又可以引导状语从句。
例二 Give this to ______ you think can do the work well .
①表示时间：when, while, as, before, after, since，until, till, as soon as, the moment（minute，second，…）, directly, immediately，every time, the first time，no sooner … than, hardly …when, scarcely … when，whenever,once等。
例一 —— What was the party like?
—— Wonderful. It is years ____ I enjoyed myself so much.
A. after B. before
C. when D. since
例二 It is difficult for us to learn a lesson in life ____ we’ve actually had that lesson.
A. until B. after
C. since D. when
例三You can eat food free in my restaurant you like.
例四 —— Did you remember to return the book to our English teacher?
—— Yes. I gave it to him _________ I saw him.
A. once B. while
C. if D. the moment
例五 _______ she met me, I was only a little girl.
A. For the first time
B. The first time
C. It was the first time
D. First of all
例六No sooner had the clerk arrived office _____ he started his computer.
A. than B. but
C. when D. then
例七 _____environmental damage is done, it takes many years for the ecosystem to recover.
A. Even if
B. If only
②表示原因： because, as, since, now that，considering that, seeing that等。
例一 Parents should take seriously their children’s requests for sunglasses _____ eye protection is necessary in sunny weather.
A. because B. though
C. unless D. if
例二Jenny was very sad over the loss of the photos she had shot at Canada, ____this was a memory she especially treasured.
A. as B. if
C. when D. where
③表示条件： if, unless，so long as, in case（万一)，on condition that, only if，providing/provided that, suppose/supposing that(倘若假使) 等。
例一In time of serious accidents, ___we know some basic things about first aid, we can save lives.
A. whether B. until
C. if D. unless
例二 We won’t keep winning games _____we keep playing well.
A. because B. unless
C. when D. while
例三 Leave your key with a neighbor ___ you lock yourself out one day
A. ever since B. even if
C. soon after D. in case
例四 —— What are you going to do this afternoon?
—— I’ll probably go for a walk later on it stays fine．
A．as far as B．so long as
C．even if D．as if
例五 John's mother allowed him to go swimming ___that he didn't go too far from the bank.
A. if B. unless
C. when D. on condition
④表示让步： though, although, even if，even though，as（让步倒装），while ( 一般用在句首 ), in spite of the fact that, no matter …，whatever, whoever, wherever, whenever, however, whichever等。
例一 We had to wait half an hour ______ we had already booked a table.
A. since B. although
C. until D. before
例二Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.
A. as if B. now that
C. even though D. so that
例三 We won’t give up we should fail 10 times．
A．even if B．since
例四Your uncle seems to be a good driver ; ______ ,I wouldn’t dare to travel in his car .
A．even so B．even though
例五 ______ happens, we should never lose hope.
A．No matter what
B．no matter whatever
例六 You should try to get a good night’s sleep much work you have to do .
A．however B．no matter
例七He tried his best to solve the problem, _______difficult it was.
A. however B. no matter
C. whatever D although
⑤表示方式：as, as if, as though, the way，how等。
例一 It looked ___ it was going to snow.
A. as if B. if
C. as D. whether
例二 We must do the experiment ______the teacher does.
A. whatever B. as
C. how D. when
⑥表示目的： that，so that, in order that, in case that, lest, for fear that，in case, for fear that，in the hope that, for the purpose that, on purpose that等。
例一 Roses need special care _____ they can live through winter.
A. because B. so that
C. even if D. as
例二 My parents live in a small village. They always keep candles in the house _____ there is a power out.
A. if B. unless
C. in case D. so that
例三He whispered to his wife_______ he might wake up the sleeping baby.
A. so that
B. on condition that
C. for fear that
D. so long as
⑦表示结果：so…that, so that, such…that, that等。
例 His plan was such a good one _____we all agreed to accept it.
A. so B. and
C. that D. as
⑧表示地点：where, wherever，anywhere, everywhere等。
例一 If you traveling ____the customs are really foreign to your own, please do as the Romans do.
A. in which B. what
C. when D. where
例二 —— Mom, what did your doctor say?
—— He advised me to live _____the air is fresher.
A. in where
B. in which
C. the place where