本篇非本人所写,为什么用原创,是因为本人不知道文章的出处,望谅解
Money is a good servant but a bad master.
金钱是个好仆人,又是个坏主人.
第一部分：连词分类
连词，主要是包括并列连词和从属连词。在句子中，连词起连接词与词、短语与短语及句子和句子的作用。它本身在句子里不单独做句子成分。
并列连词：是用来连接语法地位相同的结构、相同的单词、短语及句子。
并列连词有：and, but, or, nor, so, for yet, however, as well as, both...and, not only...but also, either...or, neither...nor, still,
从属连词：用来引导状语从句。
从属连词有：after, when, before, as, while, since, until, till, if, unless, lest, because, than, that, whether, so that, in order that, as if, as though, although, suppose that, provided, that, as...as, now that, such...that, in case that, on condition that
第二部分：连词的用法
在明确的我们的目标之后，我们来具体看看这些连词的用法。
并列连词：
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并列连词
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作用
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举例
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and
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连接单词
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My brother and I study in the Same school.
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连接短语
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Our knowledge may come from the books and from practice.
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连接句子
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We are singing and they are dancing.
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But, or
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I have a pen but no pencil.
Will you go there by bus or on foot?
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Nothing but除了，只有
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I did nothing but watch it.
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Or表示否则
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Hurry up or you will be late.
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for
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表示后面的句子是原因
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He is good at math for he studies harder than others.
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still
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表示后句概念由前句转折而来
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The weather is very cold, still we needn’t wear more clothes.
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Not only…but also
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不仅…而且。可并列主、谓、宾、表及句子。主语并列时，谓语要就近一致
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Not only he but also I am a teacher.
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As well as
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以及，同样。并列单词、短语、句子。并列主语时，动词要随前面的主语变化
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He works as well as he can
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Either…or
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既…又…，或…或…，并列主、谓、宾、表及状语
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Either come in or go out.
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Neither…nor
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既不…也不， 并列主、谓、宾、表、状语，并列主语时，谓语就近一致
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Neither you nor he speaks French.
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Both…and
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和，既…也，并列主、谓、宾及表语
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I can play both football and basketball.
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nor
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也不，引导句子要倒装
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He can not speak English, nor can I.
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so
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因此，所以，不合because连用
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You like apples, so do I.
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从属连词：
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连词
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作用
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举例
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after
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表示“时间”，在…之后
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After I finished the school, I became a worker in the factory.
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Although/though
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表示让步， “尽管”
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Although she is young, she knows a lot.
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as
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表示时间，“当…时”，方式“象…”，原因，“由于、因为”让步，“尽管、虽然”
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As it was late, we must go now.
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As if/as though
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表方式，“似乎、好像”
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He told is such a story as though he had been there before.
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As long as/so long as
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表条件，“只要”
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As long as I am free, I’ll go to help you.
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As soon as
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表时间，“一…就…”
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I will phone you as soon as I come back.
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because
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表原因，“因为”
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I have to stay in bed because I am ill.
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before
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表时间，“在…之前“
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You should think more before you do it.
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Even if/ even though
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表让步，“即使”
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You should try again even if you failed.
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Hardly…when
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表时间，“（刚）一…就”
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Hardly I entered the gate when she bell rang.
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if
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“假如”，引导条件状语从句
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What should I do net if the rain doesn’t stop?
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“是否”，引导宾语从句
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I don’t know if he comes back or not.
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In case
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表目的，“以防，以免”
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You should be more careful in case there is a fire.
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In order that
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表目的，“为了，以便”
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We study hard in order that we can pass the exam.
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No matter +疑问词
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表让步，“无论，不管”
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No matter what you do, you should try your best.
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No sooner…than
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表时间，“刚一…就…”
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No sooner had I come home than it began to rain.
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Now that
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表原因，“既然，因为，由于”
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Now that the crops are in, we can start to make preparations for winter sowing.
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once
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表时间，“一旦…”
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Once you know the rules, you’ll have choice to obey them.
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since
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表时间，“自从…以来”
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He has been in this company since he left school.
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表原因，“既然，由于”
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Since the job is dangerous, let’s do it more carefully.
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so far as/as far as
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表条件，“就…而言，就…而论”
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As far as I know, it is easy for you to speak in English.
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So that
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表目的“以便”
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Speak loud so that everybody can hear clearly.
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So…that
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表结果“如此,以致”
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He got up so late that he missed the bus.
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than
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表示比较，“比”
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Things were worse than we thought.
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that
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无词义，引导名词性从句
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It is dangerous that we walk on the thin ice.
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引导定语从句和状语从句
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She hurried that she might not be late for work.
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unless
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表条件，“除非，如果不”
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I will go to the zoo unless it rains.
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Until/till
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表时间，“直到…为止”
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I’ll wait till he comes back.
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when
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表时间，“当…时“
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When they got there, the train has left.
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whether
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“是否”引导名词性从句
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Whether he can some to see us is unknown.
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表让步，“不管/无论、是否”
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Whether she is ill or well, she is always happy.
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while
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表时间，“当…时”
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While he was in Beijing, he visited the Great Wall.
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表让步，“尽管，既然”
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While I find the problems very difficult, I don’t think them insoluble.
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whenever
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表时间，“无论什么时候”
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Whenever you meet any trouble, tell me at once.
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