高考英语二轮语法精品复习课件[张]

1、2011年高三英语二轮总复习语法年高三英语二轮总复习语法精品课件精品课件（205张）高中英语中名词1)We reached the top of the mountain after two hours climbing, _ and out of breath.A. Tiring B. being tired C. tired D. to be tired.2)At seven oclock, coffee was made and the pot was hot on the back of the stove, _ and _ to make dinner. Chotready1. 形容

2、词或词组可做状语使用，可放在句首，形容词或词组可做状语使用，可放在句首，句中或句尾。句中或句尾。考点重难点解读考点重难点解读2.形容词的位置：形容词的位置：“限定描绘大长高，限定描绘大长高， 形状年龄和新老；形状年龄和新老； 颜颜色国籍跟材料，色国籍跟材料， 作用类别往后靠作用类别往后靠”限定词限定词+数量形容词数量形容词(序数词在前，基数词在序数词在前，基数词在后后)+描绘形容词描绘形容词+大小、长短、高低大小、长短、高低+形状形状+新旧新旧+颜色颜色+国籍国籍+材料材料all half his income Tony is going camping with _ boys. A. lit

3、tle two other B. two little other C. two other little D.little other twoCthose three beautiful large square old brown wood tables3. 某些以某些以a-开首的形容词例如：开首的形容词例如：afraid，alike，alone，asleep，awake, alive 等只能等只能作表语作表语,不能作定语。不能作定语。 这类形容词一般不用这类形容词一般不用very 修饰修饰, 如：如： much afraid, fast /sound asleep , wide awak

4、e be well worth4.形容词变副词通常是加形容词变副词通常是加 ly, 其变化有规律其变化有规律可循可循,请记住以下口诀：请记住以下口诀： 一般直接加，一般直接加，“元元e”去去e加，加，“辅辅y”改改i加，加，“le”结尾结尾e改改y。 分别举例如下：分别举例如下： quickquickly, truetruly, happyhappily, possiblepossibly. friendly，lively， lonely，likely，deadly，orderly, timely, daily, yearly, monthly, brotherly, motherly 等。等

5、。某些以某些以-ly结尾的词是形容词而不是副词：结尾的词是形容词而不是副词：5. 同根副词同根副词1)close closely2)free freely 3)hard hardly4)late lately 5)most mostly 6)wide widely7)high highly 8)deep deeply1）.It was raining heavily. Little Mary felt cold, so she stood _ to her mother. close B. closely C. closed D. closing2). We decided not to cl

6、imb the mountains because it was raining_. A. hard B. hardly C. strongly D. heavy AA1) Lizzie was_ to see her friend off at the airport. A. a little more than sad B. more than a little sadC. sad more than a little D. a little more than sadB6. 倍数的考查倍数的考查1）The new building is four times the size (the

7、height) of the old one. (height/ length/ width) 2）Asia is four times as large as Europe. Your school is three times bigger than ours.3) The length of the road is four times what it was three years ago. 7.表示形容词比较级的句型：表示形容词比较级的句型： 用用much , even, still, a bit, a little, a great deal , far, by far等副词修饰形

8、容词比较级；等副词修饰形容词比较级；“The more. the more.” The harder he works, the happier he feels. 比较级与否定连用表示最高级比较级与否定连用表示最高级I could never see a better hotel.1）. Marys biology is _ than _ in the class. A. a lot of better; anyone elses B. far better; anyones elses C. much better; anyone else D. a lot better; anyone

9、elses2) Bob ran the 100 meters in 9.91 seconds, and I have not seen _ this year. （05浙江卷）浙江卷）Athe best Bbetter Cthe most Dmore BD8. cant/ can never too /too much/ enough 句型表示句型表示“无论无论都不过分；越都不过分；越越好越好 ”他如此伟大，我们无论怎样赞扬都不过分。他如此伟大，我们无论怎样赞扬都不过分。He is such a great man that we cant praise him too much.既然是好事，

10、越早开始做越好。既然是好事，越早开始做越好。Since its a good thing, we cant do it too soon.你做作业的时候，越仔细越好。你做作业的时候，越仔细越好。While you are doing your homework, you cant be careful enough.1) Must I turn off the gas after cooking ? Of course . You can never be _ careful with that . (05江西卷江西卷)Aenough Btoo Cso Dvery 2） - He is _ a

11、 brave man. - We cant admire his courage _. A. actually; very much B. indeed; too a lot C. really; too much D. truly; a bitBC 代代 词词考什么考什么?考点考点1 it, one, the one, that, those的考点的考点考点考点2 either, both, neither, any, all 和和none的考查的考查 考点考点3 another, the other, others, the others, 的用法辨析的用法辨析 考点考点4 not a l

12、ittle和和not a bit的考查。的考查。 考点考点5 简略答语中的替代简略答语中的替代考点考点6 改错改错中中代词的代词的考查考查考点考点1 it, one, the one, that, those的考点的考点1.it 指代前文出现过的某一名词，且就是指代前文出现过的某一名词，且就是同同一东西一东西。2.one也指代前面出现过的名词，但它只表也指代前面出现过的名词，但它只表示示同类同类东西中东西中泛指泛指的一个（即除了这个以外的一个（即除了这个以外还有其它的）。还有其它的）。one=a/an+名词。名词。 There was only one carpet left in that

13、shop that day, so I had no choice but to buy_. 考点突破考点突破It is a world of magic and wonders, _ where anything can happen. itone4. that常用来指代前面出现过的常用来指代前面出现过的不可数名词不可数名词 3. the one指代前面出现过的名词时，表示指代前面出现过的名词时，表示同类同类事物中事物中特指特指的某一个。的某一个。I dont want this towel. Give me _ on the left. The weather here is colder

14、 than _ in Shanghai. that也可指代也可指代可数名词可数名词，但，但that须带须带后置定后置定语语，且限制的范围内只可能有一个东西，且限制的范围内只可能有一个东西 The monitor of my computer is better than that of our monitors. the onethat5. those 指代可数指代可数名词复数名词复数,指一个范围内指一个范围内所有的人或物。所有的人或物。 The materials offered by that construction corporation are of higher quality t

15、han those offered by this small building firm.考点考点2: either, both, neither, any, all 和和none1. 两个中任意一个用两个中任意一个用either；“两个都两个都”用用both;两个中任何一个两个中任何一个 “都不都不”, 用用neither。There is coffee and tea; you can have _. Thanks. A. either B. each C. one D. itI saw a stream with red flowers and green grass on _ / _

16、 side of it. eithereach Which driver was to blame? Why. _! It was the childs fault, clear and simple. He suddenly came out between two parked cars.A. both B. each C. either D. neither2. 三个或三个以上中任意一个用三个或三个以上中任意一个用any；“三三个或三个以上都个或三个以上都”用用all；三个或三个以上中；三个或三个以上中任意一个任意一个 “都不都不”, 用用none。 1. I had to buy _

17、these books because I didnt know which one was the best (04上海上海)A. bothB. none C. neither D. all2. We had three sets of garden tools and we seemed to have no use for_ .(04浙江浙江)A. none B. either C. any D. each3.-How many elephants did you see? - _. A. None B. No one C. Not many ones D. Nothing3. both

18、和和all前加前加not或谓语部分否定时，或谓语部分否定时，属部属部分否定句分否定句;若表示若表示全部否定全部否定,要用要用neither和和none。 Not both of the twin sisters are clever. =Both of the twin sisters are not clever.Not all of us want to go. =All of us dont want to go.Neither of the twin sisters is clever.1. I have two pens. One is red, _ is green.2. This

19、 pair of gloves doesnt fit me well. Can you show me _ pair? 3. The colour of these trousers doesnt suit me. Show me some _, please. 4. To some life is a pleasure, while to _ it is suffering. 5. For some reason the young couple frequently quarrel with _. the otheranotherothersothers考点考点3another, the

20、other, others, the otherseach othernot a little修饰形容词或副词时，相当于修饰形容词或副词时，相当于very，修饰动词或指代不可数名词时相当于，修饰动词或指代不可数名词时相当于 much; not a little=much, 而而 not a bit=not at all 。 Are you hungry? Not a little.(=very hungry.) I feel as if I could eat an ox now. Were you tired when you climbed to the top of the hill?

21、Not a bit, because we were in high spirits.考点考点4 not a little和和not a bit的考查。的考查。 1. 在在Im afraid, I believe, I think , I hope等等之后的之后的not等于一个否定的从句；等于一个否定的从句；so等于一等于一个肯定句。个肯定句。(1) She must be busy now. - I think so, she cant go with us.(2) Is she feeling better today? -Im afraid not.(3) Do you think he

22、 will attend the meeting? -I guess not./ I hope not 考点考点5 简略答语中的替代简略答语中的替代否定句中既可以用否定句中既可以用not, 又可以用又可以用so的动词有的动词有b,e,s,t+imagine,既既believe, expect, suppose, think, imagine. 例如例如: -Is he going to fly to America? -No, I dont think so.=No, I think not.这种用法常见的有：这种用法常见的有：Why so? Is that so? I hope so. 否定

23、句中用否定句中用not的有的有:Im afraid not./ I hope not./ I guess not. I just smiled to me and thought，“What can I do? _ On the first day of camp, you came up to myself while I was sitting alone. _ The men threw away most of his clothes to save themselves. _4. In our Greece unit, we have been learning about its

24、rich culture and long history. _ 5. We have learned a lot from the textbook, but I believe you personal experience will be a lot better. _ myselfmetheiritsyour考点考点6 改错改错中中代词的考查代词的考查6. Surely Im expecting lots of sightseeing tours , parties and another exciting things. 7. Yes, it is clear that your l

25、ife in your country is quite different from me. 8. You may keep the books for several weeks so that you can have enough time to finish it._ 9. Before I could answer him, he continued to ask me the name of the fish on another one plate. _ 10. Just at that time I woke up and found me still in bed! _ot

26、herminethemonemyself1. -I dislike _ when others laugh at me in public or speak ill of me behind. -So do I. A. them B. those C. it D. that 2. -Shall I help you, sir? - I appreciate _ if you do me the favor to pack the luggage. A. / B. that C. you D. it?it也常用来表示一般的笼统的情况也常用来表示一般的笼统的情况 1. -He was nearly

27、 drowned once. -When was _? - It was in 1998 _ he was in middle school. A. that; when B. this; this C. this; it D. that; that2. It is the ability to do the job _ matters not where you come from or what you are Aone Bthat Cwhat Dit 3. It was not until 1920 _ regular radio broadcasts began.A. while B

28、.which C .that D. since强调句式强调句式1. I dont know whether I should go abroad or not, Mum. I leave _ to your own judgment whether you should do it.A. that B. itC. his D. what2. _ is well known _ Hong Kong returned to China on July 1st, 1997.A. It, that B. As, / C. As, as D. It, whichIt作形式主语或形式宾语作形式主语或形式宾

29、语1. What was the party like？ Wonderful！Its been years _ I enjoyed myself so much 2. It will be 3 years _ we meet again.3. It will be midnight _ they get there .A. after B.when C. before D. sinceDCBIt + be + 段时间段时间 + since-clauseIt + be + 段时间段时间 + before-clauseIt + be + 时间点时间点 + when-clause 1. It is

30、（high） time that we _ to school.A. go B. went C. have been D. have gone 2. It is the second time that we _ to Beijing.A. go B. went C. have been D. have gone3. Its no good _ such a thing.A. do B. to do C. doing D. doneIt + is +(high / about/really) time + that从句从句 It / This / That +is /was+the first

31、(second , third ) time + that从句从句 It is no use/no good/useless doing sth. 其他一些其他一些it词组词组 make it How is it going? Its my turn. Thats it. cant help (it)成功；成功到了成功；成功到了 情况怎样？情况怎样？ 轮到我了轮到我了 这就对了，就这样这就对了，就这样 没办法了没办法了倒装句 倒装句倒装句一、全部倒装的情况一、全部倒装的情况倒装句倒装句倒装句倒装句倒装句倒装句二、使用部分倒装的情况二、使用部分倒装的情况倒装句倒装句倒装句倒装句倒装句倒装句定语从

32、句 定语从句定语从句一、用什么词引导定语从句？一、用什么词引导定语从句？我们要判断到底使用关系代词还是关系副词，应先把先行词放回定语从句中，如果先行词在从句中充当主语、宾语或定语，则用关系代词“that(充当主语、宾语或表语)，who(充当主语、宾语或表语)，whom(充当宾语)，which(充当主语、宾语或表语)，as(充当主语、宾语或表语)，whose(充当定语)”；如果充当状语，则用关系副词“where，when，why”等。定语从句定语从句He is the man_never gives in to difficulty.我们将先行词“the man”放回定语从句中，则得出“the

33、man never gives in to difficulty.”在这一句子中，“the man”在句中充当主语，因此不可能用关系副词，排除了填“where，when，why”的可能性；由于“the man”指代人，在句中又充当主语，因此也不可能用“which，whom，whose”；只有当先行词前面有“such，the same”时才能用“as”，因此，以上句子只能填“that/who”。定语从句定语从句二、在什么情况下一般只能用二、在什么情况下一般只能用that引导定语从句？引导定语从句？定语从句定语从句定语从句定语从句三、在什么情况下一般只能用三、在什么情况下一般只能用which引导定

34、语从句？引导定语从句？定语从句定语从句定语从句定语从句四、如何区分四、如何区分the same.as和和the same.that?“the same. as”表示同一类人或物，如：Miss Brown also bought the same books as I did.“the same.that”指同一个人或物，例如：He is the same person that you referred to.(同一个人)定语从句定语从句五、在什么情况下五、在什么情况下whose和和of which不能互换？不能互换？whose和of which在用来指物时可以互换，如“This is the

35、 room whose window (of which the window/the window of which) is broken.”，但在下列情况下不能互换：1先行词是人时，只能用whose，不能用of which；定语从句定语从句2of不具有所属关系含义时，只能用of which(或of whom)，不能用whose。Its the first time the boy whose father is an engineer has paid a visit to our school.(不能用of which替换whose)She would like to read the

36、novel of which a great number of people have heard.(不能用whose替换of which)定语从句定语从句六、在什么情况下一般用六、在什么情况下一般用who不用不用that?先行词是人称代词时，一般用who不用that。He，who just heard the news of his fathers death，burst into tears.定语从句定语从句七、七、way后面的定语从句后面的定语从句way后面的定语从句的引导词有in which，that或不填。I recognized hes from Australia from t

37、he way in which (that/不填)he speaks.定语从句定语从句1同位语从句和定语从句的区别同位语从句和定语从句的区别同位语从句是对其前面的词所表示的具体内容做进一步的解释或说明，定语从句则对其前面的词起到限定或修饰的作用；that用来引导同位语从句时不充当句子成分，用于引导定语从句则充当句子成分；用when，where，why引导同位语从句时，其前面的词不是相应的时间、地点、原因，而定语从句则必须是相应的时间、地点、原因。定语从句定语从句The suggestion that he come right now is reasonable.(that引导同位语从句)Th

38、e suggestion that you put forward is reasonable.(that引导定语从句)定语从句定语从句2限制性定语从句和非限制性定限制性定语从句和非限制性定语从句的区别语从句的区别限制性定语从句对前面的先行词起到限制的作用，说话者强调的是定语从句的内容，如果去掉从句，原句意思就不完整；非限制性定语从句对前面的先行词只起到补充说明的作用，说话者强调的是主句的内容，去掉从句不影响说话者原来的意思；非限制性定语从句一般用逗号和主句隔开，限制性定语从句定语从句定语从句没有逗号和主句隔开；限制性定语从句的先行词不能是一个句子，非限制性定语从句的先行词可以是整个句子；as

39、引导的非限制性定语从句可放在句首，也可放在主句之后，which引导的非限制性定语从句只能放在主句之后。定语从句定语从句(1)He is the only child in the family，who is always active in politics.(2)He is the only child that doesnt lose heart easily.(3)He will end up in prison，as everybody expects.As everybody expects，he will end up in prison.(4)He always comes la

40、te，which makes his teacher angry.名词性从句 名词性从句名词性从句英语名词性从句由连词、连接代词和连接副词引导，按其作用与功能，分为主语从句、宾语从句、表语从句和同位语从句。名词性从句名词性从句名词性从句的关联词名词性从句名词性从句名词性从句名词性从句1.主语从句主语从句(1)主语从句在句子中作主语。它可以放在主句谓语动词之前。What he said sounded reasonable.他所说的听起来是合理的。(2)但多数情况由it作形式主语，而把主语从句放在主句之后。It is very important that we should master at

41、 least two foreign languages.我们起码应该掌握两种外语， 这一点很重要。名词性从句名词性从句2.宾语从句宾语从句宾语从句在句中作及物动词或介词的宾语。We all know (that)the Earth is round.Yao Ming will talk to us about what he saw in the USA.名词性从句名词性从句【注意】某些形容词或过去分词后常接宾语从句。这些形容词和过去分词常见的有：afraid，certain，glad，happy，surprised等。I am not sure whether I can afford t

42、o buy the furniture.名词性从句名词性从句宾语从句的否定转移：某些动词如think，believe，expect等，如果宾语从句的意思是否定句，常把否定转移到主句的谓语上。如“我认为他不会遵守诺言。”一句，在英语中应说：I dont think he will keep his promise.名词性从句名词性从句3表语从句表语从句表语从句位于主句中的系动词之后。That is why he was absent from school yesterday.That is where he once lived.名词性从句名词性从句【注意】连词because，as if也可以

43、引导表语从句。It looks as if it was going to snow.It is because he was ill.名词性从句名词性从句4同位语从句同位语从句同位语从句跟在名词之后，进一步说明该名词的具体内容。常见的这类名词有：fact，hope，idea，order，problem，belief，doubt，truth，suggestion，thought，question等。We all know the fact that he always tells lies.名词性从句名词性从句I am glad and excited at the good news tha

44、t Ive got the first prize for the competition.听到我竞赛获得一等奖的消息，我既高兴又激动。名词性从句名词性从句【注意】引导同位语从句一般不使用连接代词。如果主句的谓语太短，为了使句子平衡，常把同位语从句置于主句谓语之后。The news came that the enemy soldiers were completely wiped out.敌军被完全消灭的消息传来了。状语从句 状态从句状态从句状语从句就是在复合句里起状语作用的从句，修饰主句中的动词、形容词或副词等，可表示时间、地点、原因、目的、结果、让步、比较、方式、条件等。引导状语从句的连

45、词叫从属连词。状语从句的位置可在句首，也可在句末。放在句首时，从句后面常用逗号与主句隔开；放在句末时，从句前面往往不用逗号。状态从句状态从句一、时间状语从句一、时间状语从句1普通类从属连词普通类从属连词引导时间状语从句的普通类从属连词有when(当时)，while(在期间)，as (当，一边一边)，before(在之前)，after(在之后)，since(从以来)，till/until(直到)，whenever(无论何时)，as soon as (一就)等。状态从句状态从句When I went into the classroom，he was reading.当我走进教室时，他正在看书。O

46、nce time is gone，you will never get it back.时光一去不复返。状态从句状态从句【注意】在时间状语从句中，不能用一般将来时、过去将来时或将来完成时，而要用相应的一般现在时、一般过去时或现在完成时来代替。Ill telephone you as soon as I get there.我一到达那里就打电话给你。Dont get off the bus until it has stopped.等车停稳后再下车。状态从句状态从句2含含time的短语的短语可引导时间状语从句的time短语有every time，each time，(the) next time

47、，(the) last time，by the time，the first time，any time等。Every time I listen to music，Ill think of it.每当我听音乐，我就想起这事。状态从句状态从句3表示表示“一一就就”除as soon as外，还有三类：名词型the moment，the minute，the second，the instant；副词型immediately，directly，instantly；句式型no sooner.than.，hardly/scarcely.when.。The moment I saw him I knew

48、 that there was no hope.我一看到他，就知道没有希望了。状态从句状态从句【注意】如果hardly，scarcely或no sooner置于句首，句子必须用倒装结构。Hardly/Scarcely had I got home when it began to rain.我一到家就下雨。状态从句状态从句4对对before从句的理解从句的理解before的本意为“在之前”，根据具体语境还可理解为“还没来得及/还没有就，趁着还没就，不知不觉就，才”等。Before I could get in a word，he measured me.状态从句状态从句我还没来得及插话，他就给

49、我量好了尺寸。Time passed quickly and three months went by before she knew it.时间过得飞快，她不知不觉就在那里度过了三个月。状态从句状态从句5对对since从句的理解从句的理解Ive been feeling down since I lost my job.自从失去工作后，我的情绪一直低落。I have made great progress since I was ill.我自病愈以来取得了很大进步。状态从句状态从句二、地点状语从句二、地点状语从句引导地点状语从句的从属连词有where(在的地方)和wherever(在的任何地

50、方)等。Where I live there are plenty of trees.我住的地方树很多。状态从句状态从句三、原因状语从句三、原因状语从句引导原因状语从句的从属连词有because (因为)，as(由于)，since(既然)，now(that)(既然)，when(既然)，seeing (that) (由于，鉴于)，considering(that)(考虑到)，given(that)(考虑到)等。I do it because I like it.我做这件事是因为我喜欢。状态从句状态从句四、目的状语从句四、目的状语从句引导目的状语从句的从属连词有so(以便)，that(以便)，so

51、 that(以便，为了)，in order that(为了，以便)；in case(以防，以免)，lest(免得，以防)，for fear that (以免，惟恐)等。从句中一般含有can，could，may，might，will，would等情态动词。I left at 6 00 so that/in order that I could catch the train.为赶火车，我六点就出门了。状态从句状态从句【注意】当从句主语与主句主语相同时，可用不定式来表达相同的意思。译：为了通过考试，他学习非常努力。正：He studies very hard so that (in order t

52、hat) he can pass the exam. 正：He studies very hard so as to (in order to) pass the exam.状态从句状态从句五、结果状语从句五、结果状语从句引导结果状语从句的从属连词有so that (以致，结果)，so.that，such. that(如此以至于)等。She is so good a teacher (She is such a good teacher) that all the students like her.她是那么好的老师，每个学生都喜欢她。状态从句状态从句六、条件状语从句六、条件状语从句引导条件状

53、语从句的从属连词有if，unless (if. not 如果不，除非)，as/so long as(只要)，while (as long as只要)，supposing (that) /provided/providing(that) (假如)，in case (假使)，on condition that(在的条件下)等。You can learn anything so long as you set your mind to learn it.用心学本领，总能学到手。状态从句状态从句【注意】条件状语从句和时间状语从句一样，从句的谓语动词不能用一般将来时、过去将来时或将来完成时，而要用相应的

54、一般现在时、一般过去时或现在完成时来替代。Tell me in case you get into difficulty.有困难请告诉我。状态从句状态从句但若从句谓语用了will或would，那will或would则是表示“愿意”的情态动词。If you will go with me，Ill wait for you.你若愿与我同去，我就等你。状态从句状态从句七、让步状语从句七、让步状语从句引导让步状语从句的从属连词有although，though，as，while(虽然)，even if/though(即使)，whether. or. (不论/不管还是)以及“疑问词ever”和“no ma

55、tter疑问词”等。Although/Though they are poor，they are happy.他们虽穷，但很快乐。Whether you believe it or not，it is true.不管你信还是不信，这的确是事实。状态从句状态从句【注意】as作“虽然”解，引导让步状语从句时，从句中的状语、表语或动词必须置于句首，though引导的让步状语从句，也可将这些成分置于句首，但although等其他词引导的让步状语从句不能将这些成分前置。状态从句状态从句Hard as/though they tried (Although/Though they tried hard)，

56、they couldnt make her change her mind.尽管他们做了很大努力，却没法让她改变主意。引导让步状语从句时，若提前的是可数名词单数，要省略不定冠词。状态从句状态从句Child as he is，he knows a lot.虽然他是孩子，但很懂事。表示“虽然”的连词不能与表示“但是”的连词but连用，但可以与yet或still等副词连用。状态从句状态从句八、比较状语从句八、比较状语从句引导比较状语从句的从属连词为as. as(和一样)，not as/so. as(和不一样)，than(比)，the more. the more(越越)。这类从句常以省略形式出现。T

57、he more you study，the more knowledge you can get.你学的越多，你的知识就越丰富。状态从句状态从句九、方式状语从句九、方式状语从句引导方式状语从句的从属连词有as(正如)，as if或as though(好像)等。Do as I told you.按我说的去做。【注意】口语中like也可用作连词引导方式状语从句。状态从句状态从句十、状语从句的省略十、状语从句的省略时间、地点、条件、让步、方式状语从句等的主语与主句主语相同时，有时可用省略形式。He fell asleep while (he was)doing his homework.状态从句状态

58、从句他在做功课的时候睡着了。He wont come unless (he is) invited.他不会来，除非邀请他。If (it is) necessary，ring me at home.如果必要，可以打电话到我家找我。状态从句状态从句十一、易混从属连词辨析十一、易混从属连词辨析1when，while，as(1)while意为“在期间”，从句的谓语必须是延续性动词。The plane had left when we got to the airport.我们到达机场时，飞机已经起飞了。(不能用while)状态从句状态从句(2)as从句的谓语动词一般都是含有动作或发展意味的动词，不与那

59、些不用于进行时的动词连用。While/When you are in the post office，can you get me some stamps?你去邮局时，帮我买几张邮票好吗？(不能用as)(3)表示带有规律性的“每当”，或者主从句动作有先后时，都只能用when。When winter comes，it becomes cold.每当冬天来临，天就变冷。状态从句状态从句(4)表示“随着”时间的推移，主从句是两种变化的情况，只能用as。As the day went on，the weather got worse.日子一天天过去，天气越变越坏。(5)强调主句动作延续到从句所指的整个

60、时间时，只能用while。Please write while I read.我读的时候，请写下来。状态从句状态从句2because，since，as，for(1)because语气最强，表示直接的原因，是说话人认为对方不知道的原因，它引导的从句，通常位于主句之后，只是为了强调或承前才可位于主句前。He is absent because he is ill.他因病缺席。在回答why时，或者在强调结构中，或者从句作表语时，都只能用because。状态从句状态从句Why didnt you come yesterday?你昨天为何不来？Because I was ill.因为我病了。It was