(一), 并列連詞
　1, and連接語(yǔ)法作用相同的部分.
　Let me know what you saw and heard in Europe.
　如果連接的兩個(gè)名詞是指同一個(gè)人而有兩種身份時(shí),第二個(gè)名詞前不要加冠詞或所有格.
　Her husband is a singer and songwriter.
　祈使句+and代替條件句.
　Work hard and you will pass the examination.
　(1) 由and連接的兩個(gè)單數(shù)名詞(2)and前面的主語(yǔ)
　之前有every, each, no, many a的時(shí)候用單數(shù)謂語(yǔ)動(dòng)詞.
　Every train and bus was crowded with many people.
　2, both+主語(yǔ)+and+主語(yǔ)+"復(fù)數(shù)謂語(yǔ)動(dòng)詞"
　Both Tom and Jerry are going to the cinema.
　3, not only…but (also)如果連接兩個(gè)主語(yǔ),謂語(yǔ)動(dòng)詞臨近原則.
　Not only he but also his parents are very kind to me.
　4, as well as后面的主語(yǔ)不作為成分.
　This study, as well as many other reports, shows that cancer can be cured.
　后面如果接動(dòng)詞一定要用動(dòng)名詞.
　She sings as well as playing the piano.
　5, nor是否定連接詞, 后面接的句子應(yīng)倒裝.
　I don't know, nor do I care.
　因?yàn)閚or是連接兩個(gè)句子, 如果連接的不是句子,而且前面有否定詞的時(shí)候,不用nor而是用or. 除neither以外
Never try to talk or argue with Mary.
　6, but除了可以連接句子表示轉(zhuǎn)折以外,還可以用在no one, none, nobody, nothing, all, every等詞之后表示"除了…以外"
　He tried hard but he was unsuccessful.
　All the boys but one are here.
　7, however, nevertheless, still, yet,含意相同相當(dāng)于"but…anyway".
　adv. (conj)
　The car was old, yet(nevertheless) it was in excellent condition.
　She has her weaknesses, yet(but) that doesn't mean she is not qualified for the job.
　He lied to me, yet I still believe him.
　8, while表示的是"相反的",也可以用but, however, on the other hand來代替.
　While some people have nothing to eat, others eat too much.
　9, or連接句子或詞組 "或者"
　Which do you prefer, yellow, blue or red?
　Was he angry, or was he pretending?
　10, or, or else, otherwise都是否則的意思.
　Be quick, or/otherwise you will be late.
　11, either … or/neither … nor的動(dòng)詞同樣是臨近原則.
　Either Mary or her parents are going by bus.
　There is neither electricity nor free suppers in the hotel.
　12, so表示因此, 相當(dāng)于therefore.（adv.）
　They cost a lot of money, so use them carefully.
　It is very cold. Therefore, we should stay here.
　13, then （adv）然后,而后,其次
　I dropped in at her house and then I went home.
　14, for不可以放在句首;之前必須由逗號(hào); 表示推論的理由
　They must be good friends, for they are always together.
　(二), 從屬連詞
　1, that引導(dǎo)名詞性從句(主語(yǔ)/賓語(yǔ)/表語(yǔ)從句),同位語(yǔ)從句,定語(yǔ)從句,…
　That smoking can cause cancer is known to all.
　I was surprised to hear that he became the president.
　2, whether/if(是否) if 能引導(dǎo)賓語(yǔ)語(yǔ)從句
　Please tell me whether it is true or not.
　I haven't decided whether/if I'll go with you.
　在介詞后,名詞后,不定式前和有or not的句子中用whether.
　I am worried about whether she is happy.
　3, when, while, as
　when 在---時(shí)刻或時(shí)期,可指時(shí)間點(diǎn)或時(shí)間段,從句動(dòng)詞是終止或持續(xù)動(dòng)詞.When I got home, he was having supper.
　When I was young, I liked dancing.
　As 表示"邊---邊---"或"與---同時(shí)"表示動(dòng)作同時(shí)發(fā)生伴隨進(jìn)行.動(dòng)詞相似.如終止性動(dòng)詞為從句,則主句也為終止性動(dòng)詞.
　They talked as they walked.
　While表示只是時(shí)間段,不是時(shí)間點(diǎn),從句的動(dòng)詞只限于持續(xù)動(dòng)詞.
　While I slept a thief broke in.
　When 可以表示主句和從句先后發(fā)生.
　When he has finished his work, he takes a short rest.
　When 從句為終止動(dòng)詞不能為while 替換
　When he came yesterday, we were playing basketball.
　如從句動(dòng)詞為終止性動(dòng)詞,主句也是終止性動(dòng)詞 when 和as 可以互換.
　He came just as I reached the door.
　從句表示狀態(tài)可以用while.
　We should strike while the iron is hot.
　4, after/before
　After her husband died she had to take everything on herself.
　Take the medicine before you go to bed.
　5, since引導(dǎo)的從句是肯定句,一般主句都是完成時(shí),
　在it is … since這個(gè)結(jié)構(gòu)里,從句可用過去時(shí)或現(xiàn)在完成時(shí).
　若是"it was … since"從句必須用過去完成時(shí).
　She has had another baby since we met.
　It is two years since I last saw you.
　It was two years since I had played cards.
　6, till/until其中until較為常用, till是口語(yǔ).
　Until you told me, I had heard nothing of what happened.
　7, as soon as
　I'll tell him the news as soon as I see him.
　8, once(一旦)相當(dāng)于as soon as
　Once he dies, everything will change.
　9, because/since/as表示直接原因的時(shí)候不能用since或as.其他情況可以用.since-既然　　as- 由于（語(yǔ)氣弱）.
　10, so/such… that 結(jié)果狀語(yǔ)從句(程度)
　She was so moved that tears came to her eyes.
　They took such care of her that not long after she was restored to health.
　11, so/such that（結(jié)果狀語(yǔ)從句／目的狀語(yǔ)從句）, in order to/that…目的狀語(yǔ)從句
　They set out early so that they might arrive in time. 目的狀語(yǔ)從句
　Say slowly so that I can understand it.
　It was raining, so that we could not go out. 結(jié)果狀語(yǔ)從句（原因）
　12, if(假如,如果)不能用whether.
　If you call him a fatty, he will get angry.
　13, unless　=　if not
　You can not interview him unless you get the permission.
　14, though/although都作為"雖然,盡管"可以互換,although用的更多一些. 后面不可以有but但可以有yet/still/nevertheless.
　Although he is much better, yet his father isn't satisfied.
　15, as…as/ than
　16. Now that 既然
　Now that you are all back, we'd better start the work right away.
　17. Seeing that由于
　Seeing that I shall be here again tomorrow, I won't wait any longer.
　18, as可以引導(dǎo)狀語(yǔ)從句
　As I remember, he used to work here ten years ago.
　As I see it, there is still much room for improvement in our work.
　據(jù)我看來--
　Why didn't you do as you were asked to do?
　As far as I know, as far as I am concerned, --- as if (though)
　Try as he would, he couldn't open it.