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第一篇：初中英语连词练习题
英语连词用法练习题(附详解)1.—Oh, I failed again —Don’t lose heart.One more effort, ________ you will succeed.A.so that
B.therefore
C.however
D.and 2.________ a difficult situation, so you should send him a message and give him some advice.A.As he is in
B.He is in
C.Being in
D.He being in 3.She said she would work it out herself, ________ ask me for help.A.and not to
B.but not
C.and prefer not
D.rather than 4.________ enough time, but I couldn’t do it better.A.I was given
B.Given
C.To be given
D.Though I was given 5.—How can I wake up so early?
—Set the alarm at 5 o’clock, ________ you’ll make it.A.but
B.or
C.and
D.so 6.For a person with reading habits, a printed page contains not only words ________ ideas, thoughts and feelings.A.yet
B.and
C.or
D.but 7.Information technology is taught in most schools, ________ we have entered the information society.A.so
B.while
C.still
D.for 8.English is understood all over the world ________ Turkey is spoken by only a few people outside Turkey itself.A.while
B.when
C.if
D.as 9.I was on the point of going to bed ________ Mr.Zhang rang.A.as
B.when
C.while
D.and 10.I asked him whether he had done all the work himself ________ whether he had had any assistance.A.and
B.but
C.nor
D.or 11.In some countries, ________ are called “public schools” are not owned by the public.A.which
B.as
C.what
D.that 12.________ happens in the world makes us happy and sad by turns.A.That
B.What
C.Which
D.Whether 13.I read about this story in some book or other, does it matter ________ it was? A.where
B.what
C.how
D.which 14.One of the men present held the view ________ the book said was right.A.what that
B.what
C.that
D.that what 15.________ I had walked for six hours, I was tired out.A.After
B.Before
C.When
D.As
16.Tom make up his mind to get a seat for the football match ________ it means standing in a queue all night.A.as if
B.as though
C.even if
D.whatever 17.The roof fell ________ he had time to dash into the house to save his baby.A.as
B.after
C.until
D.before 18.Doing your homework is a sure way to improve your test scores, and this is especially true ________ it comes to classroom tests.A.as
B.since
C.when
D.after 19.I have been keeping that photo ________ I can see it every day, as it always reminds me of my college days.A.which
B.where
C.whether
D.when 20.You may borrow this book---________ you promise to give it back.A.in case
B.so long as
C.as if
D.even if 21.________ the man grew older, he lost interest in everything except gardening.A.With
B.Since
C.While
D.As 22.________ you understand this rule, you’ll have no further difficulty.A.Once
B.Unless
C.As
D.Until 23.I had no sooner got back to the kitchen ________ the door-bell rang loud enough to wake the dead.A.when
B.than
C.as
D.while
24.I criticized him, you know, not ________ I hate him but ________ I love him.A.because;because
B.because;for
C.for;because
D.for;for 25.________ he studies hard, he will never pass the examination.A.If
B.Unless
C.Even if
D.Even though 26.She worked hard ________ everything would be ready by the time he came back.A.since
B.so that
C.as if
D.unless 27.He waited ________ the volcano became quiet and he was able to return two days later.A.when
B.before
C.as
D.until 28.— May I go and play football with Dick this afternoon, Dad? — No, you can’t go out ________ your work is being done.A.before
B.until
C.as
D.after 29.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 though
B.in case
C.whenever
D.until 30.I was so familiar with her that I recognized her voice ________ I picked up the phone.A.the moment
B.after
C.before
D.while 【答案解析】
1.D.考查“祈使句/名词+and+陈述句”句型。句意为：“再努力点，你就会成功的”。2.B.so(因此)是并列连词，引出一个表示结果的分句，前面应是一个表示原因的分句，而无需再用连词，排除A；C和D又不是句子，也错了。
3.D.因为rather than是对称连词，意为“而不”(from www.xiexiebang.com)。
4.A.因为but是并列连词，后面是个句子，前面也一定是个句子，而不是一个分词短语或不定式短语，更不能再用连词though，所以排除B、C和D。
5.C.考查“祈使句+and+陈述句”句型，意为“如果„就„”。虽然or也可用于此句型，但or是“否则、要不然”之意，如：Work hard, or you’ll fail.(努力学习，否则就会不及格。)6.D.因为not only„but(also)„是固定搭配(from www.xiexiebang.com)。
7.D.因为句中的并列连词for表示原因，是对前面分句所述内容的解释或补充说明。8.A.因为句中的并列连词while表示“对比或相反”。9.B.因为句中的并列连词when = just at that time, 意为“这时(突然)”。10.D.因为只有or才能表示选择，意为“(是„)还是”。
11.C。本题考查what引导主语从句，并在主语从句中作主语。句意为“在许多国家，所谓的“公立学校”并非公众拥有。
12.B。本题考查引导主语从句的连接词。that引导主语从句只起连接作用，在从句中不作任何成分，无意义，但不能省略。what除引导主语从句外, 还在从句中作成分。which指一定范围内的“哪一个”；whether意为“是否”。根据句意“世上的事喜忧交替”可知答案为B(from www.xiexiebang.com)。
13.D。该题考查宾语从句。可以看作是does it matter which book it was的省略。一定注意此题受母语干扰，很容易错选答案为A。只要抓住题干前一句I read about this story in some book or other的提示，就可知道是指一定范围内的“哪一个”，故答案为D。14.D。that引导同位语从句；what the book said是同位语从句中的主语。
15.A。本题考查以after引导的时间状语从句，意为“在„之后”。句意为“步行了六小时后，我累坏了”。
16.C。even if=even though,引导的让步状语从句，意为“即使, 尽管”，符合题意。17.D。本题考查before引导的时间状语从句，意为“在„„之前”。句意为“他来不及冲进去救他的孩子，屋顶就塌了”。18.C。When it comes to...是一固定句型，意为“当谈到„„时，涉及”。句意为“做作业是提高考分的一个可靠方法，这在涉及到课堂测验时尤其正确”(from www.xiexiebang.com)。19.B。该题考查where引导的地点状语从句，表示“在„地方”。句意为“我一直把照片放在我每天都能看到的地方，因为它总使我回想起大学里的日子”。20.B。so long as=so long as, 意为“只要”，表示条件。句意为“只要你答应归还，你就可以把这书借走”。
21.D。本题考查as引导的时间状语从句，表示事物的进展，意为“随着”。句意为“那人年纪越来越大，除了园艺外其他都不感兴趣”。22.A。once引导的让步状语从句，意为“一旦”。句意为“一旦明白了这条规则，就再也没有困难了”。
23.B。no sooner„than意为“刚„就”，相当于as soon as.句意为“我刚走回厨房,门铃又响了,响得足以把死人吵醒”。类似用法还有hardly / scarcely„when.。
24.A。本题考查because引导的原因状语从句及与for的区别。for不能跟not...but这一结构连用，句意为“我批评他不是因为我恨他而是因为我爱他”。
25.C。unless引导的条件状语从句。句意为“他如果不努力学习, 就永远不能考及格”。26.B。so that引导目的状语从句。句意为“她拼命干一边能在他回来时把一切都准备好”。27.D。until引导的时间状语从句。句意为“他一直等到火山平息下来,两天后他才得以重回火山上”。28.C。此题很容易错选B。误认为是not„until句型。实际上只要抓住your work is being done.这一提示就找到了答题的关键。
29.D。本题考查until引导的时间状语从句，意为“到...为止, 在...以前”。30.A。名词短语the moment用作连词，相当于as soon as,引导时间状语从句。意为“一„„就”。类似的短语或词还有the minute, the instance, directly, immediately等
第二篇：初中英语冠词与连词专题教案
专题一—冠词、连词
一.教学内容：
暑假专题——冠词、连词
冠词
冠词是一种虚词，用在名词的前面，帮助说明名词的含义。
不定冠词形式：
不定冠词有a和an两种形式。
a.用在以辅音字母开头或以读音类似辅音的元音开头的单词前面 例：
aman一个男人
atable一张桌子
auniversity一所大学
auseful thing一种有用的东西
an用在以元音字母开头或以不发音的h字母开头的单词前面
anhour一小时anapple一个苹果
不定冠词的用法
1.不定冠词a表示“一”这一概念时，意思与one相似
There's a pen on the desk.桌子上有一支钢笔。
2.不定冠词在表示“一”的概念时，是非强调性的。
如果强调“一”这一数量，常常用one
National Day is a two-day holiday.国庆节是
（一）个两天的假日。
3.不定冠词用在表示数量、时间等名词前表示“每一（单位）„的价格、速度、顺序等”。The apples are two yuan a kilogram.这些苹果每公斤两元钱。
4.不定冠词用于单数可数名词前泛指人的职业、国籍、宗教等
5.不定冠词用在人名或表示人的名词前，表示不确定性，即说话人不清楚或没有指明所提到的人到底是谁。
A Smith called you just now.刚才一个叫史密斯的人给你打电话。
6.不定冠词用于“be of a（an）+名词”结构中，表示“相同„的”。These sweaters are of a size.这些毛衣大小相同。
7.不定冠词用于固定结构quite/half/rather/many/what/such a（an）+名词，so/too/how+形容词+a（an）+名词表示程度、数量或感叹等。
It's too difficult a problem for him.对他来说，这是一个太难的问题。
8.不定冠词用于某些习惯用语或谚语中。
in a word 总而言之at a time 一次
注：当一篇文章中第一次提到某一事物时，在名词前面要加不定冠词，以后再次提到同一事物时用定冠词。
…He saw a man standing there.The man was the person that he was looking for.…„他看到一个人站在那里。那个人就是他正找的人。„
定冠词形式：
定冠词的形式是the，它没有单、复数和词性的变化。
定冠词的用法：
1.定冠词用在名词前，表示特指，即某个特定的人、事物等。特别是当某名词后面有定语限定这一名词时，名词前面一般都要用定冠词the。
How do you like the rooms here?你觉得这里的房间怎么样？
2.用于单数名词前，指一类事物。
The lion is a wild animal.狮子是野生动物。
3.用于乐器名称前。
the violin 小提琴the piano 钢琴
4.用于世界上独一无二的事物前。
the earth 地球the world 世界
5.用在形容词前，表示一类人或事物。
the poor 穷人the aged 老人
6.用于构成形容词或副词的比较级和最高级形式。Is this the best choice he can make?
这是他能做出的最好的选择吗？
不用冠词的场合：
1.名词在句中作表语、同位语时，当它所表示的职位、头衔等是独一无二的，则不用冠词。
Smith was appointed dean of Foreign Language Department.史密斯被任命为外语系主任。
（上述的“主任”只有一个，如果这一职位不是独一的，则要用不定冠词。）
2.当名词转化为抽象含义时，不具体指某一事物，前面不加冠词，这种情况常见于一些固定短语中。
I'll take him to hospital.我将带他去医院（看病）。
（不指某一具体特定的医院而着重强调医院看病的普遍性功用。）
3.表示季节、月份、星期的名词，如果没有限制性定语，或者不表示某一特定时间，前面不用冠词。
If winter comes, can spring be far behind?冬天已经到了，春天还会远吗？
4.泛指的某顿饭前不用冠词
What do you want to have for breakfast?你早饭想吃什么？
注：表示新闻标题、提纲、广告、公告、电报、信函、书名等前不用冠词。
专有名词前的冠词：
用不定冠词的情况：
1.表示某国人，某个说话人但不清楚是谁的人。（只知其名）
He is an American.他是美国人。
2.表示某一家庭成员或某一名人的作品。
There's a Rembrandt in her collection.她的收藏品中有一幅伦勃朗的画。
用定冠词的情况：
1.某些地理名词，如江河海洋、海峡海湾、山脉群岛、沙漠等之前要用定冠词。the Yangtze长江the Pacific太平洋
2.由普通名词和其它一些词构成的专有名词，如国名、组织机构、建筑物、报纸、会议、条约等的名称前，要用定冠词。
the United Nations联合国the New York Times纽约时报
3.定冠词用在复数专有名词前，表示一家人，或某对夫妇、整个民族等。
The Americans are a nation on wheels.美国人是一个车轮上的民族。
专有名词前不用冠词的情况：
一般来说，街道、广场、公园的名字、大学名、节日名、杂志名前不加定冠词。Hyde Park海德公园National Day国庆节
抽象名词和物质名词前冠词的用法：
1.当抽象名词和物质名词表示一般概念时，不用冠词（即使前面有修饰性词）Knowledge begins with practice.认识从实践开始。
2.当抽象名词和物质名词表示某一特定概念时，特别是当它们有一限制性定语时，前面要加定冠词。
What do you think of the music?你觉得这音乐怎么样？
3.当抽象名词和物质名词表示“一种”、“一场”、“一次”、“一阵”或“一份”等意义时，要在前面加上不定冠词a或an。
Would you please give us an explanation?你能不能给我们解释一下呢?
4.表示某一品质或情绪的具体事件、人物或东西的抽象名词，前面要用不定冠词。The English evening was really a great success.这次英语晚会很成功。
连词
连词是一种虚词，在句子中不能单独作句子成分，也没有词形变化。用来连接词与词，短语和短语或句子与句子。
1.并列关系
并列连词：用来连接句子中相同成分的词、短语、或句子。
and„„和„„，„„以及„„
both…and … 既„„又
notonly… but also…不但„而且
as well as也，又。
Tom and I are friends.汤姆和我是好朋友。（连接主语）He can speak and write English very well.他英语说得和写得都非常好。（连接两个谓语）
We are happy and gay.我们兴高采烈。（连接两个表语）Both my father and mother like singing.我父母都喜欢唱歌。（连接两个主语）
Not only his parents but also he is very nice to me.不仅他的父母，就连他也对我很好。
He neither drinks nor smokes.他既不喝酒也不吸烟。（连接两个谓语）
I can sing as well as Tom（sings）.我能唱得和汤姆一样好。（连接两个分句子）
2.转折关系：表示两个概念彼此有转折关系。
常见的连词有：but 但是，yet 然而，while 而，however 可是，然而。
She can play the piano but not the violin.她会弹钢琴，但不会拉小提琴。
He isn’t tall,yet he is strong.他个不高，但他很结实。
3.选择关系：表示在两者间选择其一。
or 或者either…or…不是„„就是„„
or else 否则otherwise否则„„ You must hurry or you’ll be late.你得赶快了，否则你会迟到。（连接两个分句）
Put on your sweater, or else you will catch a cold.穿上你的毛衣，否则你会感冒的。（连接两个分句）
I went at once;otherwise I would have missed him.我立刻过去，否则就见不到他了。（连接两个分句）
4.因果关系：说明原因或产生的结果。
常见的连词有：for,so, therefore.It must have rained last night, for the road is wet.昨晚一定是下雨了，因为路上是湿的。（连接两个分句）
The headmaster called me just now, so I must go to the office at once.校长刚才给我打电话，因此我必须马上去办公室。
5.从属连词：用来连接主句和名词性从句的连词。
连词：that ,whether/ if.I am sure that you’re certain to win.我相信你们一定获胜。
He asked me if I could help him.他问我是否能帮助他。
It’s certain that they will win the final victory.肯定他们会赢得最后胜利。
连接状语从句：when ,after, before, as ,as soon as , while ,till , since.The train had left when I got to the station.当我到达车站时，火车已经开走了。
Where there is life there is hope.留得青山在，不怕没柴烧。
If you work hard, you are sure to succeed.如果你努力工作的话，肯定会成功。
The wind blew so hard that we could hardly walk.风刮得很大，我们几乎不能走。
【模拟试题】（答题时间：30分钟）
冠词练习
1.I read ______story.It is ______interesting story.A.a, anB.a, aC.the, theD./, an2.Britain is __ European country and China is ___ Asian country.A.an, anB.a, aC.a, anD.an, a3.______China is _____ old country with _____ long history.A.The, an, aB.The, a, aC./, an, theD./, an, a4._____elephant is bigger than ______ horse.A./, /B.an, aC.An, aD./, the5.We always have ______rice for ______lunch.A./, /B.the, /C./, aD.the, the6.It took me ______ hour and _____ half to finish ______ work.A.a, a, aB.an, a, aC.an, a, theD.an, a, /7.______ doctor told me to take ______ medicine three times______day, stay in _____bed, then I would be better soon.A./, a, a, theB.A, the, the, /C.The, the, a, /D.A, /, a, /8.There is ____ picture on ____ wall.I like ____ picture very much.A.a, the, theB.a, the, aC.the, a, aD.a, an, the9.January is ______first month of the year.A.aB./C.anD.the10.Shut _____door, please.A.aB.anC.theD./11.Einstein won _____ Nobel Prize in Physics in 1921.A.aB.anC.theD./ 12.What ____ fine day it is today!Let’s go to the Summer Palace.A.aB.anC.theD./ 13.I like music, but I don’t like ____ music of that TV play.A.aB.anC.theD./ 14.____ girl over there is ____ English teacher.A.The, anB.A, /C.The, /D.A, a 15.It’s ____ excitingway to shop on the Net.A.aB.anC.theD./ 16.She was ___ founder of ___ order of nuns called the Missionaries of Charity.A.a, anB.a, /C.the, /D.the, an17.Xi’an is ___ old city with ___ long history, isn’t it? A.a, anB.an, aC.the, theD.the, a 18.Nancy’s sister is ____ English teacher, isn’t she? A.aB.anC.theD./
19.Chaffs is______ boy，but he can play the guitar very well.A.an eight-years oldB.a eight-year-old
C.a eight-years-oldD.an eight-year-old
20.We often have sports after class, and I like to play _____ basketball.A.aB.anC.theD./
连词练习
1.He can speak English_______ Chinese.A.butB.alsoC.soD.and2.Physics is not so easy, _______I like it very much.A.butB.orC.sinceD.because 3.Will Tom wait for her at home ______ at the library? A.orB.asC.so thatD.both 4.She has a son _______ a daughter.A.butB.andC.soD.or
5.I’ll give her the gift ______ she arrives.A.soB.beforeC.as soon asD.since 6.Tom was ____ill that we had to send for a doctor.A.soB.veryC.andD.too 7.The woman was____ angry_____ she couldn’t speak anything.A.neither…norB.either…orC.both…andD.so…that 8.______we got home it was very late.A.WhenB.WhileC.BecauseD.As 9.We heard clearly_____ she said.A.whatB.whichC.beforeD.because
10.I can’t sleep well at night，______I often feel very tired in the day． A.soB.becauseC.andD.or
11.When you’re learning a foreign language，use it，______ you will lose it． A.butB.orC.thenD.and 12.---Can you play football?
---Yes, I can，______ I can’t play it very well．
A.orB.andC.butD.so
13.Study hard，______ you will fall behind．A.andB.butC.soD.or 14.My favorite is action movie ______ I think it’s exciting.A.andB.becauseC.butD.so 15.The boy is very smart, ______ many of his classmates like him.A.butB.soC.orD.for 16.He has never heard______ seen such a thing before.A.norB.andC.orD.since
第三篇：初中英语知识点总结连词知识点总结
初中英语知识点总结：连词知识点总结
一，表示并列关系的连词有：
and,both…and,neither…nor,either…or,not only…but also，as well as
1．and
“和，并且”，连接对等的词句。（在否定句中要用or连接。）
I like physics and chemistry.我喜欢物理和化学。
I don’t like physics or chemistry.我不喜欢物理和化学。
2．both…and“……和……都”
Both Jim and Mary went to the cinema yesterday.昨天吉姆和玛丽都去看电影了。
Exercise is good both for body and for mind.运动有益于身心。
3．neither…nor两者皆不
He neither smokes nor drinks.他既不抽烟又不喝酒。
I like neither swimming nor skating.我既不喜欢游泳，又不喜欢溜冰。
4．either…or不是…就是…，或者…或者….。
Either you come to the office now,or wait for me at home.你要么现在到办公室来，要么就在家等着。
Either he or I will leave.不是他就是我将要离开。
5．not only…but(also)不但……而且……(not only…but also中的also可以省略。)
Not only she but also I am wrong.不但她错了，我也错了。
He not only made a promise,but kept it.他不仅许诺，而且做到了。
6．as well as也、又
We will rescue Henry as well as you.除了你，我们还要营救亨利。
He likes basketball as well as football.除了足球，他还喜欢篮球。
二、常用的从属连词：
（一）引导时间状语从句的连词有：when,while,since,until,after,before,as soon as
1．when当……时
When we got there,the meeting had begun.我们到时，会议已经开始了。
It was raining when she arrived at the station.她到达车站时，正在下雨。588.es
2．while正当……时，正在……时。（while引导的从句中，谓语动词必须是延续性动词，且常常用进行时。
Don’t make any noise while others are reading.别人读书时不要制造噪音。
She sang while she was walking.她边走边唱。
3．since自从
It’s just a month since we arrived here.我们到这儿刚好一月了。
My mother has been ill since I left home.自从我离开家我妈妈就一直生病。
4．until直到……为止
Until you told me,I knew nothing at all about it.在我告诉我之前，我对此之外无所知。
He didn’t appear until the meeting had begun.直到会议开始他才露面。
5．before在……之前
after在……之后
I’ll phone you after I arrive.我到达之后给你打电话。
Say goodbye before you go.你走之前要说再见。
6．as soon as一……就
I’ll visit you as soon as I come back.我一回来就去拜访你。
Please tell him as soon as you see him.你一看见他就请告诉他。
（二）引导原因状语从句的连词：because,since,as,for,now that
1．because因为(because与so不能并用。)
I can’t believe in him because he isn’t honest.我不能信任他，因为他不诚实。
She didn’t come because she didn’t know it.她没有来，因为她不知道。
2．since既然
Since he says so,it must be true.既然他这么说，那一定是真的。
Since you ask,I will tell you.你既然问，我就告诉你。
3．as因为，由于
As we are hungry,let’s have supper.由于大家饿了，我们就吃晚饭吧。
Mother began to worry about my brother as it was getting dark.由于天越来越黑，妈妈开始为哥哥着急。
4．for因为
We can't go for it is raining.我们不能走，因为正在下雨。
I enjoyed myself at the party for I knew all the guests well.我在晚会上玩得很尽兴，因为所有的个人我都很熟悉。
5．now that既然
Now that he is unhappy,let’s leave him alone.既然他不高兴，我们就让他自己呆着吧。
Now that she feels sorry,please forgive her.既然她很后悔，就请原谅她吧。
（三）引导结果状语从句：so…that,such…that
1．so…that如此……以致
She is so tired that he can’t go any further.她太累了，不能再走了。
She is so big a cat that she can’t get into the hole.这猫太大了钻不进这洞。
2．such…that如此……以致
It’s such a beautiful place that I wouldn’t come back.这地方太美了，令我留恋返。
It’s such a fine day that many people go to the park for fun.天气这么好，许多人都到公园里来玩乐。
（四）引导目的状语从句的连词：so that,in order that以便
They hurried so that they can get there on time.他们加快了速度，为的是能够按时到达。
I hired a boat in order that I can go fishing.为了去钓鱼，我租了条小船。
（五）引导比较状语从句的连词：than,as…as
He is taller than his brother.他比他兄弟高。
She could draw as well as her teacher.她能画得跟她的老师一样好。
（六）引导让步状语从句的连词：though,although（though与although的用法基本一样）
Although it rained hard,he still went out.尽管雨下得很大，他还是出去了。
Even though I have enough time,I don’t want to go there with him.尽管我有时间，可我并不想跟他去那。
今天的内容就介绍这里了。
第四篇：初中英语并列连词总结
并列连词
连词是一种虚词，它不能独立担任句子成分而只起连接词与词、短语与短语或句子与句子作用。连词主要分为两类：并列连词和从属连词。
并列连词表示单词、短语、从句或句子间有并列关系。分为：表平行或对等关系的连词、表转折关系的连词、表选择关系的连词、表因关系的连词
一、并列连词：
1.and “和” ；both…and…“……和……两个都” ；as well as“也”
not only…but also…“不但……而且……”;neither…nor…“既不……也不……” 例My mother bought me a present,and I like it very much.我妈妈买了一件礼物给我，我很喜欢He can speak not only English but also French.他会说英语还会说法语。
2.but“但是”；yet“然而”；while“而”；however“然而”
例： Lucy likes red while Lily likes white。露西喜欢红的，然而莉莉喜欢白的。
3.or“或者”；either…or…“要么……要么……”
注：由or 连接的句子可以转换为有否定条件构成的主从复合句。
Eg：Study hard，or you’ll fail the exam.=If you don’t study hard,you’ll fail the exam.努力学习，否则你考试会失败的。
Either you or he goes.“要么你去，要么他去”。
4.表因果关系的并列连词so “所以，因此”;for “因为”
Eg：Kate was ill so she didn’t go to school.凯特病了所以没去学校。
I have to stay up，for I have lots of homework to do。我必须熬夜，因为我有很多作业。
二、不能同时出现在一个句子中的连词。
1.because（因为),so（所以)不能同时出现在一个句子里，只能用其一.eg：Because he was tired,he couldn’t walk here.=He was tired,so he couldn’t walk there.因为他很累，所以走不到这里。
2.although/though（虽然），but（但是）不能同时出现在一个句子里，只能用其一。但although/though和 yet 可以同时出现在一个句子里（yet 用作副词）
Eg:Though he was tired,he still worked hard.=He was tired,but he still worked hard.：虽然他很累，但是她仍然坚持工作
三、and 和or 用于否定句中的区别
1)当列举成分是主语，又在否定词之前时用and连接；而当列举成分在否定词之后时，用“or”构成完全否定.Eg：I can’t sing or dance.我不会唱歌，也不会跳舞。
Lucy and lily can’t speak Chinese.露西和莉莉都不会说汉语。
在否定句中，如果所连接的两部分都有否定词那么用“and”而不用“or”
Eg：There is no water and no air on the moon.月球上没有水也没有空气。
2)在否定句中，without +and；而在肯定句中，without+or,构成完全否定。
Eg：Man can’t live without air and water=Man will die without air or water.五、由 either……or….., neither……nor……,not only……but also……连接两个并列主语时，谓语动词与较近的主语保持一致。（就近原则）
Not only my parents but also I am looking forward to meeting you.不止我父母，连我很也很想见到你。
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