【2019年高一英語】人教版 必修三 Unit 1 Festivals around the world （語法與寫作）教案

1、.必修三 Unit1 Festivals around the world適用學(xué)科高中英語適用年級(jí)高中一年級(jí)適用區(qū)域人教新課標(biāo)版課時(shí)時(shí)長(zhǎng)分鐘2課時(shí)知識(shí)點(diǎn)本單元情態(tài)動(dòng)詞的區(qū)別與用法教學(xué)目的掌握情態(tài)動(dòng)詞的區(qū)別與用法；理解并學(xué)會(huì)三段式寫作教學(xué)重點(diǎn)1. to review and consolidate what they have learned in this unit.2. develop ability to solve problems.教學(xué)難點(diǎn)to turn what they have learned into their ability.教學(xué)過程一、復(fù)習(xí)預(yù)習(xí)根據(jù)語境記詞匯單詞拼寫1It

2、 is difficult to get used to another countrys customs 風(fēng)俗2I admire 欽佩 him very much for he is a learned and kind man.3He was awarded 授予 the first prize in the competition.4The studies find that people who are able to forgive 原諒 feel less stress and less depression.5We enjoy the harmony of school life

3、, in which we can gain 獲得 a better result of study.6On his arrival 到達(dá) at the railway station, he was told that his train was delayed for two hours.7Having not been given the gift, little Tom wept 哭泣 after the ceremony.8They receive baskets full of food and clothing 衣服 from the people they work for.語

4、境填詞用所給詞的適當(dāng)形式填空1Kelly wrote a letter to Kim to apologize for her calling her nickname, but Kim didnt accept her apology.apologize2Even if you have a permit, I wont permit you to enter the hall without my permission.permit二、課堂導(dǎo)入概念引入情態(tài)動(dòng)詞The classroom can seat thirty students. 這教室能坐三十位學(xué)生。You must obey t

5、he school rules.你必須遵守校規(guī)。It is cold in the room. They musthave turned off the heating. 屋里很冷，他們肯定把暖氣關(guān)了。It must / may / might / could have rained last night .The ground is wet. 地濕了，昨晚肯定/可能/也許下雨了。三、知識(shí)講解知識(shí)點(diǎn)1 情態(tài)動(dòng)詞概念：在動(dòng)詞一般動(dòng)詞之前形成動(dòng)詞的否認(rèn),疑問,時(shí)態(tài),語態(tài),語氣或表示特殊意義的動(dòng)詞叫做助動(dòng)詞,其中具有感情色彩一些助動(dòng)詞叫做情態(tài)動(dòng)詞。情態(tài)動(dòng)詞是一種本身有一定的詞義，但要與動(dòng)詞原形及其被

6、動(dòng)語態(tài)一起使用，給謂語動(dòng)詞增添情態(tài)色彩，表示說話人對(duì)有關(guān)行為或事物的態(tài)度和看法，認(rèn)為其可能、應(yīng)該或必要等。情態(tài)動(dòng)詞后面加動(dòng)詞原形。知識(shí)點(diǎn)2 情態(tài)動(dòng)詞分組辨析：1.【考察點(diǎn)】can和could could為can的過去式 的根本用法1表示才能，如：He can speak English better than you. can和be able to都可表示才能，兩者在意思上沒有什么區(qū)別。但是can只能有如今式和過去式，而be able to那么有更多的形式，可位于情態(tài)動(dòng)詞之后或表達(dá)過去成功地做了某事。如：He will be able to do the work better.He was

7、able to finish the work on time.2 表示客觀的可能性Accidents can happen to any drunken driver.According to the radio, it could rain this afternoon. 3表示“答應(yīng)時(shí)can可以和may換用，如：You can may go home now.假如要表示語氣婉轉(zhuǎn)，可用could代替can，這時(shí)could不再是can的過去式，注意答復(fù)時(shí)不能用could。如：- Could you come again tomorrow?- Yes, I can./ No, I cant.3

8、 在疑問句和否認(rèn)句中表示疑心、驚奇、不相信的態(tài)度。如：Can this green bike be Liu Dong's? How can you believe such a liar like him?4 用于肯定句，表示一時(shí)的情況，意為：有時(shí)候會(huì)。如：It can be very hot here in summer.Tom is a clever boy, but he can be dull sometimes.2.【考察點(diǎn)】may和might might為may的過去式的根本用法1表示允許或答應(yīng)，否認(rèn)用mustnt, 表制止。如：- May we swim in this

9、lake? - No, you mustn't. It's too dangerous. 肯定可以用比較婉轉(zhuǎn)的說法進(jìn)展答復(fù)。如：- May I use this dictionary? - Yes, please. /Certainly. / Yes, you can.2在表示懇求、答應(yīng)時(shí)，用might比may 語氣更婉轉(zhuǎn)些, 如：May I have a look at your new computer? May I?在文體上較正式，較客氣，日?？谡Z中常用Can I?3may或 might都可以表示可能性，表示"或許"、"可能"之意，

10、假如用might表示可能性，那么語氣更加不肯定，如：They may might be in the library now. He is absent. He may/ might be ill.4May 用于祈使句，表示祝愿。如：May you have a happy life.May you succeed.比較Wish you a happy new year. Wish you success.3.【考察點(diǎn)】must的根本用法1must表示“必須、“應(yīng)該之意，語氣比should, ought to強(qiáng)烈，其否認(rèn)式 must not，縮寫形式為 mustnt，表示 “不準(zhǔn)、或“制止之意

11、，如：We must study hard and make progress every day. You mustn't touch the fire. 2 對(duì)以must提出的疑問句，如作否認(rèn)答復(fù)時(shí)，要用neednt或用dont doesnt have to 不必來答復(fù)，而不用mustnt，因?yàn)閙ustnt表示的是“制止或“不答應(yīng)之意，如： - Must we finish the work tomorrow? - No, you needn't don't have to, but you must finish it in three days.3 must可以

12、表示推測(cè)，表示“一定或“必定之意，只用于肯定句中。如：- Whose new bike can it be?- It must be Liu Dong's. I know his father has just bought him a new one.You must be ill. I can see it from your face.4.【考察點(diǎn)】have to 的根本用法1have to和must的意義相近，只是 must側(cè)重表示說話人的主觀看法，而have to 那么表示客觀需要，如：I must study hard.You have to hand in your co

13、mpositions before next Monday.2have to 有人稱、數(shù)和時(shí)態(tài)的變化,否認(rèn)式要用助動(dòng)詞，dont have to如：They had to speed up, for the weather turned terrible. He has to stay at home because of illness5.【考察點(diǎn)】should的根本用法1should表示“建議或“勸告，有“應(yīng)該之意，可與ought to 互換。如：You should learn from each other. You should/ ought to go and see Mary s

14、ome time.2表示推測(cè)，譯作：很可能，該，是說話人對(duì)客觀事物的真實(shí)性做出較大可能性的判斷。如：Its already 10. She promised to come by 10. She should be here at any moment.3 why/how + should 表示“竟然，含意外、驚異等語氣。Why should you be so late today?I dont understand why you should think that I did it.4should后接完成式表示過去沒有做到本來應(yīng)該做的事情，或是做了本來不應(yīng)該做的事情。如：You shou

15、ld have given him more help.You shouldnt have left home without saying a word. 5 表示萬一，用于if 從句Ask Tom to ring me up if you should see him.6.【考察點(diǎn)】will的根本用法1 可以表示“意志或“決心，如：I have told him again and again to stop smoking, but he will not listen. Can someone help me? I will.2懇求或詢問對(duì)方的意愿，如：Will you please

16、tell me how to get to the Capital Gymnasium? Will you open the window?3表示一種習(xí)慣性的動(dòng)作，有“總是或“慣于之意，will 指如今，would 指過去。如：Every morning he will have a walk along this river. 7.【考察點(diǎn)】would的根本用法1would作為will的過去式，可用于各人稱，表示過去時(shí)間的"意志"或"決心"，如：He promised he would never smoke again. 2 在疑問句中，用

17、于第二人稱，表示說話人向?qū)Ψ教岢鰬┣蠡蛟S問對(duì)方的意愿時(shí)，比用will的氣更加婉轉(zhuǎn)，如：Would you like some more coffee? 3在日常生活中，學(xué)用"I would like to"表示"我想要"或"我愿意"之意，以使語氣婉轉(zhuǎn)，如：I would like to do Ex.2 first. 4 would可以表示過去的習(xí)慣動(dòng)作，比used to正式，并沒有"現(xiàn)已無此習(xí)慣"的含義。如：Last year our English teacher would sometimes tell us

18、stories in English after class. / During the vacation he would visit me every week. 5 表料想或猜測(cè)，如：It would be about ten when he left home. What would she be doing there?I thought he would have told you about it.8.【考察點(diǎn)】shall的根本用法1 在疑問句中，shall用于第一、三人稱，表示說話人的征詢對(duì)方意見或懇求指示，如：Shall I open the door?2 shall用作情態(tài)

19、動(dòng)詞時(shí)，用于第二、三人稱，表示說活人的意愿，可表示"命令"、"警告"、"強(qiáng)迫"、"威脅"或"許諾"等意，如：He shall go first, whether he wants to or not. 9.【考察點(diǎn)】need的根本用法1need作情態(tài)動(dòng)詞用時(shí)，主要用于否認(rèn)句和疑問句中，如：He needn't worry about us now.  2need也可作為行為動(dòng)詞用，可用于肯定句、否認(rèn)句和疑問句中，其后可接名詞、代詞、動(dòng)名詞或帶 to 的動(dòng)詞不定式為其賓語。如：Y

20、ou need to practise reading aloud every day. 3needn't后接完成式可以表示過去做了一件本來不必要做的事情，如：- Did you answer the letter yesterday? - Yes, I did. - But you needn't have answered it.10.【考察點(diǎn)】dare的根本用法ldare dared為其過去式 作情態(tài)動(dòng)詞用時(shí)，主要用于否認(rèn)句，疑問句和條件從句中，如：Dare he break the traffic regulations again? You will be punis

21、hed if you dare do such a thing.2在現(xiàn)代英語中dare常用作行為動(dòng)詞，其變化與一般行為動(dòng)詞一樣，如：She dares to stay at home alone at night.知識(shí)點(diǎn) 3寫作指導(dǎo)：三段式作文所謂三段式就是將一篇書面表達(dá)按三段的寫作形式謀篇布局。三段式的形式寫法通常為：1第一段開門見山，提出要解決的問題或觀點(diǎn)，或者把時(shí)間、地點(diǎn)、人物和主要事情及時(shí)點(diǎn)出。2第二段要擺出事實(shí)或提出論據(jù)，或者把事情開展的經(jīng)過詳細(xì)寫出來。3最后一段，得出結(jié)論或理由。注意：要學(xué)會(huì)使用過渡詞。過渡詞猶如“橋梁和“粘合劑。恰當(dāng)?shù)厥褂眠^渡詞可防止構(gòu)造松散，層次不明，表意不清等

22、弊端，使文章條理清楚，文字連接流暢。常用的過渡詞有：1. 遞進(jìn)型：besides，whats more，worse still，moreover，even，furthermore等；Many of them can hardly look after themselves, still less manage their own life.他們很多人幾乎不能照顧自己，更別說經(jīng)營(yíng)他們自己的人生。2. 解釋型：in fact, as a matter of fact, actually, in other words, that is to say, that is等；He was once th

23、ought to be a boy who was not worth educating. In fact, he was a man full of imagination.他曾被認(rèn)為是一個(gè)不值得教育的孩子。事實(shí)上，他的想象力非常豐富。3. 轉(zhuǎn)折型：however，but，yet，although，otherwise，instead，on the contrary等；On the contrary, the volunteers always claim that they are tired of the life on earth, so they are eager to exper

24、ience the future life on the Mars.相反，這些志愿者說，他們厭倦了地球上的生活，因此他們渴望體驗(yàn)將來火星上的生活。4. 列舉型：firstly.secondly.finally，on the one hand，on the other hand等；On one hand, I can earn some money by doing it to help my parents, and on the other hand, I can gain some experience from it, which will do good to my future li

25、fe.一方面，我能通過做這樣的事賺些錢來幫助父母；另一方面，我能從中獲得一些經(jīng)歷，這會(huì)對(duì)我將來的生活有益。5. 舉例型：for example，for instance，such as，that is，like，take.for example等；On one hand, I will organize some English activities, for example, to hold English debates or English speech contests so as to help us students arouse their interest in English

26、.一方面，我會(huì)組織一些英語活動(dòng)，例如舉辦英語辯論賽或英語演講比賽，目的是幫助我們學(xué)生進(jìn)步英語方面的興趣。6. 因果型：because of，since，therefore，as a result，thanks to，thus，due to等；Therefore, there is no reason for us to look down upon ordinary jobs.因此，我們沒有理由輕視普通的工作。7. 讓步型：though，although，in spite of，despite等；No matter who breaks the law, he will be punished

27、.不管誰違法都要受到懲罰。8. 順序型：first.next.and then.finally，first.then.after that.finally等；Firstly, I collected all the books, newspapers and other things scattered in the rooms and put them in place. Then I wiped the dust off all the furniture. After that, I swept and mopped the floors.首先，我把所有的書籍、報(bào)紙和其他的散落在屋子里的

28、東西搜集起來放好，接著我掃去所有家具上的灰塵，然后我掃地、拖地。9. 并列型：and，or，also，as well as等；I think we will have a good time there and I will send your photos taken there.我想我們會(huì)玩得很愉快，而且我將會(huì)把在那里拍的你的照片送給你。10. 總結(jié)型：in conclusion，in a word，to sum up，in short，on the whole等；In a word, success is important, and so is failure, because its

29、 the mother of success.總之，成功很重要，失敗也很重要，因?yàn)樗浅晒χ浮?2. 見解型：in my opinion，personally speaking，as far as I am concerned等。As far as I am concerned, they stand for love, friendship and unity.以我看來，他們代表愛、友誼和團(tuán)結(jié)。以上寫作形式可時(shí)常運(yùn)用于實(shí)際的寫作過程中，只要我們把握好寫作技巧和形式，書面表達(dá)才能的進(jìn)步也就指日可待了。四、例題精析【例題1】Many houses near the airport were d

30、estroyed by the wind.Well, the wind _ have been very strong.【答案】must【解析】機(jī)場(chǎng)附近的很多房子都被風(fēng)破壞掉了。哦，那場(chǎng)風(fēng)一定很大。must表示推測(cè)常用于肯定句。【例題2】If Doric continues doing things like that, he _ face the music one day!【答案】shall【解析】考察情態(tài)動(dòng)詞。句意：假如Doric繼續(xù)做這樣的事情，那么他一定會(huì)自食苦果的。face the music“承擔(dān)后果。此處shall用在第三人稱he后表示說話人的警告。再如：He shall st

31、ay in bed.他必須躺在床上?！纠}3】Please dont tell anybody.I _.I promise.Acant BdontCwont Dmustnt【答案】選C【解析】考察情態(tài)動(dòng)詞的用法。句意：“請(qǐng)別告訴任何人。“我不會(huì)的，我保證。cant“不可能；不可以；dont助動(dòng)詞，表示否認(rèn)；wont“不會(huì)的；mustnt表制止。根據(jù)句意，選C項(xiàng)。【例題4】She looks very happy. She _ have passed the exam.I guess so. Its not difficult after all.Ashould BmustCcould Dmig

32、ht【答案】選B【解析】考察情態(tài)動(dòng)詞。句意：“她看上去很開心。她一定是通過了考試?！拔蚁胧前?，畢竟考試不難。四個(gè)備選項(xiàng)都可以用來表示推測(cè)，must語氣最強(qiáng)，然后是should, could, might語氣最弱。根據(jù)語境，說話人推測(cè)她通過考試是有一定的理由的，即她看起來很開心，因此推測(cè)時(shí)很有把握，故用must?！纠}5】假設(shè)你是李越，你的加拿大筆友Steve來信說，他和他的一些同學(xué)正在學(xué)中文，請(qǐng)你推薦兩本學(xué)中文的詞典。根據(jù)下表提供的信息，請(qǐng)你給他寫一封回信。英漢詞典新華字典收詞字18 000 英語20 000 漢語10 000價(jià)格52元11元特點(diǎn)大量例子、用法說明，合適初學(xué)者中國(guó)最常用的漢語字

33、典注意：1.詞數(shù)：100左右；2參考詞匯：推薦recommend；英漢詞典The EnglishChinese Dictionary ECD；新華字典Xinhua Dictionary XD。Dear Steve，_Yours，Li Yue【答案】Dear Steve，Im so pleased to learn that you and your classmates are learning Chinese.Id like to recommend the following two dictionaries .The EnglishChinese Dictionary is really

34、 a good one for beginners .It has 18,000 English words and 20,000 Chinese words. Besides plenty of examples，it has many notes telling you how to use a word .Xinhua Dictionary is the most popular Chinese dictionary，and it has a vocabulary of 10,000 words .It may also be useful to some advanced learne

35、rs of Chinese .Of the two，ECD is more expensive. It costs 52 yuan，and XD costs 11 yuan.Please let me know if you want me to buy one for you.Yours，Li Yue【解析】此篇書面表達(dá)屬于實(shí)物說明文，其篇章構(gòu)造可按三段式進(jìn)展寫作。本文的第一段，可用直接的表達(dá)“Im so pleased to learn that you and your classmates are learning Chinese。正文即可作為第二段，其主要內(nèi)容是對(duì)兩本詞典的一些介紹。

36、完畢語即可作為第三段。應(yīng)將兩本詞典的特點(diǎn)表達(dá)準(zhǔn)確，以便加拿大筆友Steve做出合理選擇。表達(dá)時(shí)，文章的根本時(shí)態(tài)可考慮用一般如今時(shí)。五、課堂練習(xí)一根據(jù)漢語提示及所給單詞完成句子1You _沒有必要告訴他，for I had told him about it earlierneed2We _本該買 a new lock for the front doorshould3Im not sure that Im going to the lecture tomorrow afternoonI_可能去 ProfBlacks class insteadgo4I didnt hear the bell r

37、ingI _肯定睡著了asleep5A dog ran in front of my mothers car and she _不得不停頓 very quicklyhave6. You _本應(yīng)到達(dá)earlier.arrive7. She _一定擦了the table, for the table is very clean.clean8. _你能屏住呼吸for 5 minutes?breath9. The guide suggested that we _ 出發(fā)tonight.set10.You _應(yīng)該原諒her, for it is not her fault.forgive11.We _一

38、定不要嘲笑the old people.laugh12.Oil _漂浮on water.float13.She _不可能來了，for her boss asked her to finish a lot of work today.turn14.It _ 可能是種風(fēng)俗。custom15.She _過去常常開玩笑others.trick二用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空：1. There is 20 minutes left. We _ not have to be in such a hurry. 2. Where is my watch? I really cant find it. Where _ i

39、t be?3. The doctor told the old man that he _ avoid eating fat. 4. Its too late. I think he _ go to bed. 5. _ you mind my troubling you with a few questions?6. He _ flee Europe before the war broke out.7. Peter _come with us tonight, but he isnt sure.8. I didnt hear the phone .I _ have been asleep.9

40、. My friend John _ smoke, but now he doesnt.10. You _ drive carefully. The road there is too narrow.11. Shall I tell John about it?-No, you _ .Ive loved told him already.12. My mother _ have called me this morning. But she didnt, so I was late for school and was blamed by my teacher. 三根據(jù)中文意思補(bǔ)全以下句子：1

41、. 他們必須盡快完成這個(gè)任務(wù)They _ _ _ _ as quickly as possible.2. 外國(guó)也能將它們的節(jié)目傳送到中國(guó)來。Foreign countries _ _ their programs to China.3. 相信我的話，我一定讓你們平安到達(dá)利物浦。Upon my word, I _ _ in Liverpool.4. 應(yīng)當(dāng)首先滿足世界人口的根本需要。The basic needs of the worlds population _ _ _ first.5. 以前這里有個(gè)公園。There _ _ _ a park here.6. 已經(jīng)六點(diǎn)了。你隨時(shí)都該到這兒。It

42、s six oclock now. He _ _ _ at any moment. 四短文改錯(cuò)假設(shè)英語課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌的以下作文。文中共有10處錯(cuò)誤，每句中最多有兩處。錯(cuò)誤涉及單詞的增加、刪除或修改。增加：在缺詞處加一個(gè)漏詞符號(hào)，并在此符號(hào)下面寫出該加的詞。刪除：把多余的詞用斜線劃掉。修改：在錯(cuò)詞下面劃一橫線，并在該詞下面寫出修改后的詞。注意：1. 每處錯(cuò)誤及其修改均僅限一詞；2. 只允許修改10處，多者從第11處起 不計(jì)分。 More and more foreigners like to come to China. Last Friday our scho

43、ol was invited a foreign teacher in our city give a class to the students of Senior Grade Two. We found his class interested. I learned a lot from him. The teacher had a free talk to us with easy English. He spoke slow so that we could understand him well. Sometimes he repeated what we dont understa

44、nd. My classmates were all active in the class. To his joy, I understood everything the teacher said. And I was able to ask question in English. This class encouraged me very much. Im sure that until we keep on practicing, it will be easy for us to learn speaking English well.【答案解析】完成句子1neednt have

45、told him2should have bought 3may/might go to4must have been asleep5had to stop6. should/ought to have arrived7. must have cleaned8. Can you hold your breath 9. should set off/out10.should for give11.mustnt laugh at 12.will float 13.cant turn up14.may be a custom 15.used to play a trick on用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空：

46、1. neednt 2. can 3. should 4. must 5. Would 6. was able to 7. may 8.must 9.used to 10.shall11.neednt 12.should根據(jù)中文意思補(bǔ)全以下句子：1. must finish the task 2. can send 3. will land 4. must be satisfied/met 5. used to be 6. should be here 短文改錯(cuò)1.去掉invited之前的was2.give前加erested interesting4.with in5.slow

47、slowly6.dont didnt7.his my8.question questions9.until if10.speaking spoken課程小結(jié)復(fù)習(xí)并掌握部分情態(tài)動(dòng)詞的用法和區(qū)別，學(xué)習(xí)并掌握三段式作文寫作方法，學(xué)會(huì)運(yùn)用常見過渡詞，使寫作程度進(jìn)步一個(gè)臺(tái)階。課后作業(yè)一單項(xiàng)填空從A、B、C、D四個(gè)選項(xiàng)中，選出能填入空白處的最正確選項(xiàng)。1. We hope that as many people as possible _ join us for the picnic tomorrow. A. need B. must C. should D. can2. Whats the name?

48、Kevin. _ I spell that for you? A. Shall B. Would C. Can D. Might3. We _ have proved great adventurers，but we have done the greatest march ever made in the past ten years. A. neednt B. may not C. shouldnt D. mustnt4. The weather turned out to be fine yesterday. I_ the trouble to carry my umbrella wit

49、h me. A. should have taken B. could have taken C. neednt have taken D. mustnt have taken5. There _ be any difficulty about passing the road test since you have practised a lot in the driving school. A. mustnt B. shant C. shouldnt D. neednt6. I _ have been more than six years old when the accident ha

50、ppened. A. shouldnt B. couldnt C. mustnt D. neednt7. You dont have to know the name of the author to find a book. You _ find the book by t he title. A. must B. need C. can D. would8. Mrs. Brown，our geography teacher，_，for her bag with maps and a globe are already on the teachers desk. A. must arrive

51、 B. can have arrivedC. must have arrived D. has arrived9. All my family are looking forward to meeting you. You _ come over and have dinner with us this weekend. A. will B. must C. may D. shall10. How was the journey? Did you come back by plane or by train? For some reason. I came back by train. I _

52、 back by plane，though. A. could have travelled B. should travel C. might travel D. would have travelled【答案解析】單項(xiàng)填空1. D 解析此題考察情態(tài)動(dòng)詞的用法。根據(jù)句意“我們希望明天有盡可能多的人可以參加我們的野餐。可知應(yīng)選D項(xiàng)。2. A 解析考察情態(tài)動(dòng)詞的用法。shall用于第一、第三人稱，表示征求意見。would一般用于第二人稱。can表示答應(yīng)，一般用于否認(rèn)句和疑問句。might表示委婉語氣。3. B 解析此題考察考生對(duì)情態(tài)動(dòng)詞表示推測(cè)含義的掌握和運(yùn)用才能。句意為“我們也許不能成為偉大的

53、探險(xiǎn)者，但我們?cè)谶^去的十年里完成了從未有過的最偉大的遠(yuǎn)征。根據(jù)句意可知，這里應(yīng)該填情態(tài)動(dòng)詞表示推測(cè)。對(duì)過去情況的推測(cè)應(yīng)使用情態(tài)動(dòng)詞的完成式；表示不非常有把握的否認(rèn)推測(cè)不能使用mustnt. 而neednt和shouldnt加動(dòng)詞的完成式一般不用于表示推測(cè)。所以B項(xiàng)may not“可能不是正確答案。4. C 解析should have done意為“本應(yīng)做某事但沒做；could have done意為“可能做了某事；neednt have done意為“沒有必要做某事但卻做了。根據(jù)句意可知C項(xiàng)最正確。must表推測(cè)時(shí)不能用在否認(rèn)句中。5. C 解析此題考察情態(tài)動(dòng)詞的用法。A項(xiàng)指“制止；B項(xiàng)有“命

54、令，許諾等意思；C項(xiàng)表示主觀的不應(yīng)該或按客觀推測(cè)不應(yīng)該；D項(xiàng)意為“不必。6. B 解析此題考察情態(tài)動(dòng)詞的用法。shouldnt have done表示“不應(yīng)該做而做了。couldnt have done表示對(duì)過去事情的否認(rèn)推測(cè)。句意為“事故發(fā)生時(shí)我不可能已經(jīng)六歲多了。7. C 解析考察情態(tài)動(dòng)詞的用法。句子的意思為“想要找一本書，你不一定要知道作者的名字，你通過書名也能找到。由題意可知應(yīng)選C項(xiàng)。8. C 解析考察情態(tài)動(dòng)詞的用法。由題干中的for可知，此處要用表示推斷的情態(tài)動(dòng)詞。注意：must arrive用來對(duì)如今或?qū)淼那闆r進(jìn)展推斷；can have arrived只用于疑問句或否認(rèn)句中；must have arrived用來推斷過去的情況；has arrived是一種客觀陳述。9. B 解析考察情態(tài)動(dòng)詞的用法。must必須；一定。句意為“我們?nèi)胰硕寂瓮姷侥恪＿@個(gè)周末，你一定要來和我們一起吃晚飯。如：I must shut the door，or the rain will come in. 我必須把門關(guān)上，不然雨就進(jìn)來了。10. A 解析考察情態(tài)動(dòng)詞的用法。答句句意為“由于某種原