牛津初中英语8B unit1—unit8 知识点归纳

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1、牛津初中英语8B unit1unit8 知识点归纳8B Unit1【考点精讲】一、核心词汇1past n考点点拨 past作名词，意为“过去”，其还可作介词和形容词，可用于如下情况：in the past（n）在过去；half past(prep.)five 5点半；in the past(adj.)three years在过去的3年里。如：When he walks past our desks, he always knocks ourbooks and pens off the desks.当他走过我们课桌的时候，他总是把我们的书本和钢笔从课桌上碰掉下来。The boy finished

2、 his homework with the help of his father in the past.这个男孩过去是在他父亲的帮助下完成作业的。2present n考点点拨present作名词，意为“现在，目前”。At presentat the momentright now目前；其还可作形 容词，your present job你目前的工作；present用作名词，还可表示“礼物”，a birthday present -份生日礼物。如：He is washing his clothes at present.现在他正在洗衣服。3northern adj。考点点拨 方位词：north

3、-northern; west-western; south-southern; east-eastern。如：in the north of China in the northern part of China在中国北部East China华东；North China华北The northern part of the city used to be sparsely populated, but has now become a cultural centre.城北过去人口稀少，但现在成了文化中心。4pollution n考点点拨 常见短语：air pollution空气污染；noise

4、 pollution噪音污染；light pollution光污染。如：I could hardly believe she had made a video about water pollution by herself.我几乎不能相信她靠自己制作了一份有关水污染的录像。pollute作动词，意为“污染”，pollute the air污染空气。5interview n& vt考点点拨 interview作名词，意为“采访，会见”，还可作动词，意为“采访，面试”；interviewer作名词，意为“采访者，面试官”。如：interview sb have an interview with

5、 sb.采访某人Sally became a member of the company after the job interview.萨莉在求职面试后成为了这家公司的一员。I interviewed Mr Zhang yesterday afternoonI had an interview with Mr Zhang yesterday afternoon.昨天下午我采访了张先生。6return v.考点点拨 return作“返回”讲时是不及物动词，相当于come/get back: 作“归还”讲时是及物动词，相当于giveback。return to someplace回到某处；ret

6、urn sth to sb. give sthback to sb.把某物还给某人。return本身含有back的意思，不能再和back连用。如：他借了我的手机，还没还给我。正：He borrowed my mobile phone and hasnt returned it to me.误：He borrowed my mobile phone and hasnt returned it back to me.二、核心句型1. You used to share food with me!你过去常和我分享食物！考点点拨 used to do sth过去常常做某事（现在不做了）；be used

7、 to do sth. be used for doing sth是被动语态结构，意为“被用来做某事”；be used to doing sth意为“习惯于做某事”，其中to为介词，后接名词、代词或动名词。如：I used to play tennis but I dont play it very often now.我过去常打网球，但现在不常打了。Stamps are used to post letters. Stamps are used for posting letters.邮票是用来寄信的。I am used to going to school by bus.我习惯于坐公交车去

8、学校。2. When I got married in 1965, my wife and I moved two blocks away and weve lived in this area since then.当我1965年结婚时，我和妻子搬到两个街区以外，从那以后一直住在这个地区。考点点拨 marry sb.嫁给娶某人；get married结婚（动作）；be married to sb.与某人结婚（状态）；getmarried to so. 与某人结婚（动作）。如：They married their daughter to an old rich man.他们把女儿嫁给了一位年老

9、的富人。This couple have been married for 50 years.这对夫妇结婚已有50年了。3. Anyway, its good to see the amazing changes in the town.不管怎样，看到小镇这些令人吃惊的变化还是很好的。考点点拨“Its+adj. (easy，important，bad，nice)+ (for sb.) to do sth”是英语中应用非常广泛的一个句型，意为“（对某人来说）做某事是（容易的，重要的，坏的，好的）”。其中it是形式主语，无实际意义，真正的主语是后面的动词不定式to do sth。如：It is i

10、mportant for us to master a foreign language.掌握一门外语对我们来说很重要。三、重点语法现在完成时1基本结构为：助动词have/has+动词的过去分词(1)表示过去发生的行为、动作或情况对现在造成的影响或结果。时间副词常用just(刚刚)，already（已经），still(仍然)，recently（最近），yet（还、尚），ever（曾经），never（从不）。其中just，already用于肯定句；yet，ever，never常用于疑问句或否定句；still，recently可用于肯定句、否定句或疑问句。如：Have you ever been

11、to Hong Kong?你曾经去过香港吗？I havent got the letter from my uncle yet.我还没收到我叔叔的信。(2)表示从过去开始并持续到现在的行为、动作或情况。常与for或since引导的时间状语连用。for表示一段时间，后接时间段；since表示“自从”，后接时间点。(3)也常与so far(迄今为止)，in the past several years(在过去几年里)，ever since（迄今），in/during/over the past/last few years(在过去几年里)这类从过去到现在的时间状语连用。在此类句子中，谓语动词要用持

12、续性动词，而不能是短暂性动词。如：The children have been away from home since the new term began.(木用left)自从新学期开始，孩子们就已经离开了家。2具体的几组时间短语辨析ago用于一般过去时（用瞬间动词）；sinceago用于现在完成时；in the past用于一般过去时；in the past few years用于现在完成时；just now(置于句末)用于一般过去时；just(置于句中)用于现在完成时。如：I bought this dictionary three years ago.I have had this

13、dictionary for three years.I have had this dictionary since three years ago.这本字典是我三年前买的。还可以用“It is/has been+时间段+since从句”改写为：It is three years since I bought this dictionary.【考点精练】一、单项选择( )1. (2014泰安)-Can you find our city _ a lot in recent years? -Yes. The road is wider and the buildings are taller.

14、 Ahas changed B changes C changed Dwill change( )2. (2014沈阳)Im not hungry because I have_ had lunch A ever B never Cjust Dstill( )3. (2014黔南)He came back late, so his father was very angry.（选出与画线部分意思相同或相近的一项） A arrived B gave back C returned Dreached( )4. (2014南充)She used to _ a bus to school, but n

15、ow she is used to _ to school. A taking; walk B take; walk C taking; walking D. take; walking( )5. (2014平凉)She _ for ten years and now she has a lovely daughter. A. married B has been married C. got married D. has got married二、根据句意及中文提示完成单词1What was your hometown like in the_（过去）?2Do you know what y

16、ou should do at_（现在，目前）?3I think there will be more_（污染）in fifty years.三、用所给单词的适当形式填空1. (2014常州)-Guo Taos new book about his stories with his son_ (come) out.- Really? Why not go to the bookshop and buy one right now?2. Yancheng is in the_ (north) part of Jiangsu.3. (2014镇江)Li Jianrou was_ (intervie

17、w) shortly after she won the first gold medal for China in the 22nd Winter Olympic Games.4. It is necessary for us_ (listen) carefully in class.【参考答案】一、15 ACCDB二. 1. past . 2. present 3. pollution三. 1. has come 2. northern 3. interviewed 4. to listen8B Unit2【考点精讲】一、核心词汇1fantastic adj.考点点拨意为“极好的，美妙的”

18、。a fantastic beach一片极好的海滩；a fantastic achievement 一项了不起的成就；have a fantastic timehave a good/great/wonderful time玩得开心。fantasy n(pl. fantasies)幻想，想象。如：Stop living in a fantasy world别再生活在幻想世界中了。2such det.& pron.考点点拨 such意为“这样的（人或物）”，常用于以下结构：such+a/an+adj.+可数名词单数。如：This is such a big house.这是一座如此大的房子。su

19、ch+adj.+可数名词复数。如：They are such kind girls.她们是如此好心的女孩。such+adj.+不可数名词。如：It is such sad music.它是如此悲伤的音乐。辨析 so常用于以下结构：so+adj.+a/an+可数名词单数。如：so clever a boy如此聪明的一个男孩so+adj.adv.。如：so clever如此聪明；so quickly如此迅速so many/much/few/little+n。如：so many mistakes如此多的错误3couple n考点点拨意为“两人，两件事物，几个人”。a coupleof一对，几个，几件

20、。如：I saw a couple of men get out我看见有两个男人出去了。We went there a couple of years ago.我们几年前去过那儿。二、核心句型1.I dont think itll be a holiday for me.我想这对我来说不会是个假期了。考点点拨本句原为“I think it wont be a holiday for me.”这是一个“否定前移”的句子，主句中的否定词实际上否定的是后面从句的内容。在英语中，当主句是I think，I believe等时，其后的宾语如果是否定式，则要把否定前移至主句，表达成“I dont thin

21、k/believe+肯定句”的句式。这是因为英美人士在表达个人观点时比较委婉。如：I dont think he is an honest boy.我认为他不是个诚实的孩子。I dont believe that will happen我相信那不会发生。2. It moved at high speed and was really exciting!它高速运动，确实令人兴奋！考点点拨 at high speed以高速，在句子中可以作状语、表语等。如：The train is travelling at high speed.火车正高速运行。The car was at high speed

22、when the accident happened.事故发生时那辆小汽车正处于高速运行的状态。3. Next, we hurried to a restaurant to have a quick meal.接下来，我们匆匆去了一家餐馆吃了一顿简餐。考点点拨 hurry to someplace匆忙赶到某处；hurry to do sth. be in a hurry to do sthdo sth in a hurry匆忙做某事；in a hurry赶快，急忙。Tom was still late though he hurried to school.虽然汤姆匆匆赶到学校，但还是迟到了。

23、John is in a hurry to catch his train约翰急着赶火车。4. On the way, we met some Disney cartoon characters, such as Snow White and-Mickey Mouse在途中我们遇到了一些迪斯尼卡通人物，比如白雪公主和米老鼠。考点点拨(1) on the way在途中，在路上。后面可以直接跟地点副词homehere/there，跟地点名词时名词前要加介词to。其中the也可以换用形容词性物主代词。如：Lets wait a few moments. Hes on the way.咱们等一会儿，他

24、正在路上。He lost his watch on his way to school this morning.今天早晨他在去学校的路上丢了手表。(2) such as例如，比如。一般用来列举同类人或物中的几个例子，插在被列举的例子和被列举的名词之间，as后没有逗号。如：He has been to many countries, such as America,Japan and Germany.他去过很多国家，比如美国、日本和德国。such as后面不可以列出前面所提过的所有东西。如：正：I know four languages, such as Japanese and Englis

25、h我懂四种语言，如日语和英语。误：I know four languages, such as Chinese, French, Japanese and English我懂四种语言，如汉语、法语、日语和英语。在 现代英语中，such as可与etc.（等等）连用。如：They planted many flowers, such as roses,sunflowers，etc.他们种了许多花，如玫瑰、向日葵等。辨析 for example例如。一般只列举同类人或物中的一个为例，作插入语，不影响句子其他部分的语法关系。可置于句首、句中或句末。如：For example，air is invis

26、ible.例如，空气是看不见的。He, for example, is a good student例如，他就是个好学生。三、重点语法1使用have/has been与have/has gone have/has been曾经去过，表示去过某地，现在已经回来了，人已经不在那里，指的是人的一种经历；have/has gone已经去了某地，表示人在途中或已经到达目的地，人不在说话者处，强调去某地还没有回来。两者后面可以直接跟地点副词，跟地点名词时名词前要加介词to。如：- Where is Tom? 汤姆在哪里？- He has gone to the bookshop.他去书店了。(Tom在去书

27、店的路上或已到书店，人不在说话处。)- Where have you been recently? 你们最近去哪里了？- We have been to Hong Kong.我们去香港了。（人已回来，不在香港。）Miss Brown has gone to Japan布朗小姐去日本了。（人在去日本途中或已在日本，不在说话处。）I have never been to the Great Wall.我从未去过长城。（谈论以前的经历。）“have been in+地点名词”表示在某地待了多长时间，常与表示一段时间的状语连用，表示持续到现在的状态。如：He has been in London fo

28、r half a month.他在伦敦已经有半个月了。2和for及since连用的动词(1) for可以用来表示一段时间。“for+一段时间”用在完成时的句子中时，表示动作延续到说话的那个时刻。如：I stayed there for two weeks.我在那里待了两周。（现在不在那里了。）I have stayed here for two weeks.我已经在这儿待了两周了。（现在还在这里。）(2) since意为“自从”，后可跟时间点或时间状语从句，表示一段时间。如：I have lived here since 1985.自从1985年起，我就住在这儿了。They have lear

29、ned about 100 Chinese songs since they came to China自从他们来到中国，他们已经学了约100首中文歌。在上述含有一段时间的完成时句子中，主句中的谓语动词要用延续性动词。如：I have had this bike for five years.我买这辆自行车有五年了。(3)延续性动词和短暂性动词英语中的动词可分为延续性动词和短暂性动词。延续性动词表示一个动作可以持续一段时间或更长时间，常见的有live，stay，study，play，read，write，sleep，talk，wait，fly，lie，walk等；短暂性动词表示一个动作发生在一

30、瞬间，非常短暂，常见的有begin，start, finish, come, leave, find, get up, arrive, reach, get to, enter, hear, stop, open, close, become, buy, borrow, lend, happen, die等。延续性动词和短暂性动词都可用于完成时的句子中。但如果完成时句子中含有表示持续时间的时间状语，则要用延续性动词或相当于延续性动词的动词短语作谓语。有些短暂性动词也可转换为延续性的表达方式。如:finish/stop-have/has been over; borrow-have/has ke

31、pt; leave-have/has been away; buy-have/has had; die-have/has been dead: fall ill-have/has been ill; begin/start-have/has been on; catch a cold-have/has had a cold; marry-have/has been married; get married-have/has been married; arrive/come/go-have/has been in/at; join-have/has been in或 have/has been

32、 a member of【考点精练】一、单项选择( )1. (2014扬州)-Where is Mr Wang? - He together with his students_ Zhuyuwan Park A. has gone to B have gone to C. has been to D. have been to( )2. (2014安徽)Rick has learned a lot about Chinese culture_ he came to China Abefore Bwhen Cuntil Dsince( )3. (2014凉山)She_ her hometown

33、since she was 18 years old. She told me she would return soon A has left B has been away from C left Dwent away( )4. The summer holiday is_. Well have more free time. Ain the way B in this way C by the way Don the way二、根据句意及中文提示完成单词1. (2014宿迁)Im afraid to ride a roller coaster, especially when it mo

34、ves at high_（速度）2Youd better_（匆忙，急忙）to your classroom. Its time for class.3How dare you do_（这样）a thing?三、根据汉语提示完成句子1我认为你在家自己教孩子并不明智。I _ think it _ wise for you to teach your children at home.2(2014乐山)3-D打印机能打印各种东西，比如汽车、飞机甚至人体某些部位，这很神奇。Its amazing that 3-D printing can copy many different things, _ c

35、ars, airplanes and even human body parts.【参考答案】一、14 ADBD二.1. speed 2. hurry 3. such三. 1. dont; is 2. such as8B Unit3【考点精讲】一、核心词汇1receive vt考点点拨 receive是动词，意为“收到，接到”，是指客观、被动地接收；而accept是指主观接受。如：I received a bunch of flowers yesterday, but I didnt accept it.昨天我收到一束花，但是我没有接受。2Asia n考点点拨 Asia是名词，意为“亚洲”。A

36、sian作形容词，意为“亚洲的，亚洲人的”；作名词，意为“亚洲人”。类似词有：Africa非洲-African非洲（人）的；非洲人Europe欧洲-European欧洲（人）的；欧洲人America美洲，美国-American美洲（人）的；美国（人）的；美洲人，美国人Australia澳大利亚-Australian澳大利亚（人）的；澳大利亚人Russia俄罗斯-Russian俄罗斯（人）的；俄罗斯人如：China is a developing country in Asia中国是亚洲的一个发展中国家。That man comes from Australia He is an Austral

37、ian那名男子来自澳大利亚，他是澳大利亚人。3southern adj.考点点拨 southern是形容词，意为“南方的，南部的”。对应的名词是south，意为“南方，南”。类似词有：east东方，东-eastern东方的，东部的west西方，西-western西方的，西部的north北方，北-northern北方的，北部的如：in the east/west/south/north ofin the easternwestern/southern/northern part of在东西南北部Shanghai is in the east of China Shanghai is in the

38、 eastern part of China.上海在中国东部。4international adj.考点点拨 international是形容词，意为“国际的”。如：international charities国际慈善机构an international football match 一场国际足球比赛The Red Cross is a big international organization红十字会是一个大型的国际组织。nation名词，意为“国家；民族；国民”。national形容词，意为“民族的，国家的”。如：National Day国庆节二、核心句型1. What do you

39、usually use your computer for?你通常用你的电脑做什么？考点点拨 What do you usually use your computer for? What do you usually use your computer to do?What did you do that for? Why did you do that?你为什么那么做？2.I usually use it to search for information.我通常用它来搜索信息。考点点拨 search for寻找；搜索。后面跟具体的客体，指搜寻的东西，即search for sth。如：T

40、he police are searching for the missing girl.警方正在搜寻那个失踪的女孩。search搜索，搜查。后面跟某个地方或人，指的是搜索的客体的媒介。如：He searched all his pockets for his keys.他翻遍了所有的口袋找他的钥匙。The police searched the room carefully, but found nothing.警察们仔细搜查了房间，但是什么也没发现。3. Have you noticed the “Tour icon at the top of the page?你注意到页面顶端的“旅游”

41、图标了吗？考点点拨 at the top of在上端（上部），在顶端，侧重于“点”的接触。如：This one should be at the top of your list.这一项应该在你列表的顶端。on (the) top of表示一个东西直接放在另一个东西上面（顶部），侧重于“面”的接触。如：Youd better put these books on the top of the desk.你最好把这些书放在桌子上面。反义短语：at the foot of在脚下；at the bottom of在底部。如：The village stands at the foot of the

42、hill.那个村庄坐落在小山脚下。Fill in your address at the bottom of the application form.把你的地址填写在申请表的底部。4. It has been famous for its theatres since the early twentieth century.自二十世纪初以来它就以它的剧院而闻名。考点点拨 be famous for因而出名著名。如：Suzhou is famous for its beautiful scenery.苏州以它的美景而闻名。Xuyi is famous for lobsters.盱眙因龙虾而出名

43、。5. Would you mind showing me how fo start this online tour?你介意给我演示一下如何开始这个在线旅游吗？考点点拨 Would you mind doing？可用于客气地请某人做某事。如：Would you mind opening the window, Kate?凯特，你介意开一下窗户吗？注意该句型的答语：Of course not当然不（介意）。No problem没问题。Not at All. -点儿也不（介意）。Sorry, I cant. Im busy. /My hands are full.抱歉，我不能。我正忙着。我手里满

44、是东西。Would you mind not doing？用于客气地请某人不要做某事。如：Would you mind not shouting here?请您别在这儿大声喧哗好吗？三、重点语法一般过去时和现在完成时的区别一般过去时和现在完成时都可以表示过去发生的动作或存在的状态，但是在具体的语境中，它们有着明显的区别：1用法及强调的内容不同(1)一般过去时表示过去某个时间发生的动作或存在的状态，着重陈述过去发生的事情或存在的状语，不涉及现在的情况。如：I went to the park last Sunday.上周星期天我去了公园。（着重说明“上周星期天我去公园”这件事，和现在无关。）(2

45、)现在完成时常用于以下情况：表示从过去开始一直持续到现在的动作或状态，强调持续到现在。此时常和since或for连用。如：Li Ming has lived in Nanjing since his family moved there in 2000.自从2000年他家搬到南京，李明一直住在那儿。（着重说明李明住在南京是从他家搬到南京开始一直持续到现在。）She has been here for ten years.她已经在这里十年了。（着重说明她在这里从过去一直延续到现在十年了，而且还可能一直延续下去。）表示过去发生的动作对现在造成的影响或结果，强调对现在造成的影响或结果。此时常和alr

46、eady，yet，ever，just，never等连用。如：I have had my breakfast already.我已经吃过早饭了。（“吃早饭”这个动作是过去发生的，对现在造成的影响是“我饱了，我不饿”。）I have ever read this book我曾经读过这本书。（“读过这本书”这个动作是过去发生的，对现在造成的影响是“我知道这本书的内容”等等。）2连用的时间状语不同现在完成时跟模糊的过去时间状语连用或不用时间状语；一般过去时通常跟具体的过去时间状语连用。常跟现在完成时连用的时间状语有：so far，in the past ten years, up to now, si

47、nceago, for, already, yet, ever, never, before, recently, lately等。常跟一般过去时连用的时间状语：yesterday，last week，last year, last month, the day before yesterday, just now, in 1980等，如：I have learned about 2, 000 English words so far.到目前为止我已经学会了大约两千个英语单词。They learned 20 English words last week.上周他们学了二十个英语单词。【考点精练

48、】一、单项选择( )1.I _ a letter from my cousin Andy yesterday. Aget Bcame C received Daccepted( )2. - Could I have a day off tomorrow, sir?- _. AGood idea! BWhy not! C. What for?D. Thats right.( )3. The criminal(罪犯)was _ food when the policemen caught him Alooking Bfinding C. searching D. searching for( )4

49、. Would you mind _ in the room, please? A. not smoke B. dont smoke C. not smoking D. no smoking二、根据句意及中文提示完成单词1(2014济宁)I plan to travel to several_（欧洲）countries this summer vacation.2. On June 10th, 2014, the central government made up a project on the development in the_（南部的）part of Xinjiang.3. The

50、ir school is on the_（顶）of a hill.4Huawei is a big_（国际）company now.参考答案一、14 CCDC二. 1. European 2. southern 3. top 4. international8B Unit4【考点精讲】一、核心词汇1Germany n考点点拨 Germany名词，意为“德国”。German作形容词，意为“德国（人）的”，作名词，意为“德国人”。常见的国家名称和某国人的单复数形式：国家名称 某国人单数 某国人复数GermanyGerman GermansAmerica American AmericansAust

51、ralia Australian AustraliansCanada Canadian CanadiansFrance Frenchman FrenchmenFrenchwoman FrenchwomenEngland Englishman EnglishmenEnglishwoman EnglishwomenChina Chinese ChineseJapan Japanese Japanese法国人、英国人复数形式是将a改为e，而德国人复数形式并不是将a改为e，中国人、日本人单复数形式相同。2stomach n考点点拨stomach意为“腹部，胃”，虽然是以ch结尾，但是由于“ch”是发/

52、k/音，所以其复数形式是在词尾直接加“-s”。如：The stomachs of starving people often distend.饥民的腹部常鼓得大大的。3either adv.考点点拨 either意为“也”，用于否定句，且要放在句末。如：Millie cant skate. I can, t either.米莉不会滑冰，我也不会。too作“也”讲时，用于肯定句末尾，或作为插入语放在句中，前后用逗号隔开。如：Tom can swim. I can swim too.汤姆会游泳，我也会。You，too，may have a try. You may have a try too.你

53、也可以试一试。also在书面语中比too更为正式，用于肯定句中。紧靠谓语动词，位于be动词、助动词、情态动词后，行为动词前。如：His uncle is also a policeman他叔叔也是一名警察。She is also reading a novel.她也在看小说。Sandy can also swim桑迪也会游泳。二、核心句型1. Have you decided what to do with these books, Hobo?霍波，你已经决定要怎样处理这些书了吗？考点点拨 what to do withhow to deal with怎样处理。注意疑问词what和动词do搭配

54、，疑问词how和动词deal搭配。如：What are we going to do with the problem?我们将怎样处理这个问题呢？I have a huge pile of letters to deal with我有一大堆信件要处理。2. However, they soon got up again and continued moving across my body可是，他们不久后又爬起来，继续在我身上爬。考点点拨 continue doing sth继续做某事，也可以说continue to do sth，两者意思相同：如：They continued meeting

55、 every day. They continued to meet every day.他们继续每天见面。表示继续维持某一情况时，其后可直接跟名词作宾语，也可先接介词with再接宾语。如：We will continue (with) the payments for another year.我们这样的报酬还要维持一年。continue doing sth.意为“继续做某事”，continue by doing sth.意为“接着做某事（其他事）”。如：He continued reading/to read all night.他通宵在看书。He talked about Keats,

56、and continued by reading us a poem他谈了济慈，接着给我们朗诵了一首诗。三、重点语法1特殊疑问词+动词不定式(1)“特殊疑问词+动词不定式”结构相当于一个名词，在句子中可作主语、宾语、表语、宾语补足语、状语、同位语等句子成分。大部分特殊疑问词可用于该结构，如when，how，which，where，who等等。注意：疑问词why不能用于该结构。如：Where to go is still a question去哪里还是个问题。（作主语；作主语时，谓语动词常用单数形式）I know where to find the boy.我知道哪里能找到这个男孩。（作动词kn

57、ow的宾语）The question is how to learn English well.问题是怎样学好英语。（作表语）The question where to spend this weekend troubles Millie到哪儿去过周末这个问题困扰着米莉。（作同位语）连词whether也可以用于该结构。如：They are talking about whether to have a party.他们正讨论是否要举办一场聚会。（作宾语）(2)“特殊疑问词+动词不定式”结构经常用在某些动词（短语）后面作宾语，常见的有tell，show，know，learn，teach, fin

58、d out, forget, wonder, remember等。如：Ill show you how to do it.我会让你看看如何做这件事。“特殊疑问词+动词不定式”结构还可以用在be sure，be clear等后面作宾语。Im not sure when to leave.我不确定何时出发。(3)“特殊疑问词十动词不定式”结构可以把复合句转换为简单句。如：I dont know what Ill do next.I dont know what to do next.我不知道下一步该做什么。反之可以将含有“特殊疑问词十动词不定式”结构的简单句转换为复合句。改写时只需在疑问词后加上适

59、当的主语，并把不定式改为适当形式的谓语即可。如：Li Ping doesnt know how to learn EnglishLi Ping doesnt know how he should learn English李平不知道该怎样学英语。(4)“特殊疑问词+动词不定式”结构可以独立成句。如：What to do?怎么办？How to get rid of the trouble?如何摆脱困境？(5)常见的两类错例动词后面要不要加介词？如：我还没决定住哪儿。误：I havent decide where to live in.正：I havent decide where to live

60、.注：where是疑问副词，副词前不需要加介词。可以说live there，live in the flat，不可以说live in there，live the flat。动词后面要不要宾语？如：我不知道该做什么。误：I dont know what to do it.正：I dont know what to do.注：这里不要it，因为前面的what就是do的逻辑宾语，it在这里多余。我不知道怎样去做。误：I dont know how to do正：I dont know how to do it.注：这里要it，因为do是及物动词，后面需要宾语，而how是疑问副词，不能作动词do的宾语，它在这里作状语，所以这里需要it。2must和have tomust表示主观的意愿或命令，语气强烈。其否定形式为mustnt，意为“禁止，不可以”；have to表示客观的义务或需要，意为“必须，不得不”，其否定形式为dont h