高中英語(yǔ)《Unit 2 Healthy eating》period 2課件 新人教版必修3

1、Healthy Eatingperiod 2Learning about LanguageWarming UpPrepare for “discovering useful words and expressions” on page 12.Ex 1.lie 2. get away with 3. raw4. curiosity 5. customer 6. benefitEx 2.2. ought to 4. diet 5. raw 8.balanced9. energetic 10. slimbecome thinnerlose weight3. being laughed at by h

2、er friendslosing face6. felt so sad and hopeless about herselflose heart7. was unwilling to visit any morelose interest in visitingPrepare for “Discovering useful structures” on page 13.Ex 2.ought to; shouldnt; neednt; dont have to/neednt; will2. have to; mustnt3. ought to; shouldPresentationGrammar

3、_ _ 主要情態(tài)動(dòng)詞Can, couldMay, mightMustOught toNeedDare, daredcan表能力：I can read very fast.表客觀可能性：Mary cant be the leader.表允許：You can take it away.表懷疑：How can you finish it?could表能力/可能性：Could you finish it soon?表懷疑：He could not be 50.委婉地提出問(wèn)題：Could you show me the passport?用于虛擬：If you had come, you could h

4、ave got a wonderful gift.may詢問(wèn)或說(shuō)明可不可以做：May I ask you a question?表可能會(huì)發(fā)生：He may get angry.表目的或讓步的從句：Come here in time so that you may see the singer.might表可能的事：（同may）表目的從句： （同may）用于虛擬： If you had finished it, the boss might have given you some promotion. must表必須做的事：You must hand in your homework this

5、Friday.表揣測(cè)：It must have rained last night.表“偏偏”的意思：He must get a fever when we were ready to get off.ought to 表應(yīng)該做的事：You ought to do it carefully.表非常可能的事：He ought to be here by now.need表需要；主要用于否定句或疑問(wèn)句：We neednt hurry.可用于否定意思的句子：I dont think you need do it.作及物動(dòng)詞，和不定式連用：He didnt need to say that to he

6、r.dare表“敢于”，主要用于疑問(wèn)句、否定句和條件從句：He dare not tell him the news.作及物動(dòng)詞，與不定式連用：We dont dare to enter the house.shall用于第一，三人稱疑問(wèn)句，征求意見(jiàn)或請(qǐng)求 shall 第二，三人稱陳述句, 命令,警告,允諾,威脅 should 表勸告，建議，命令，順理成章 ought to 表應(yīng)該，語(yǔ)氣should美語(yǔ)中，ought to用于否，疑句時(shí)to 可省。多數(shù)情況下，ought to可與should互換使用。疑問(wèn)句中常用should代替ought to。Ought to的反意疑問(wèn)句用shouldnt替

7、代。Ought to表示“想必會(huì)”時(shí)語(yǔ)氣較must 弱。shall , should &ought to你最好不要抽煙了。 You should/ ought to stop smoking.You ought to have helped him with his English, _ ?wont you B. ought not youC. shouldnt you D. wouldnt you他們想必已到那兒了。They ought to be there by now.(語(yǔ)氣較must 弱)比較had better, should & ought to 三者均表示建議，意為“應(yīng)該”，“

8、應(yīng)當(dāng)”或“最好做”. 三者的語(yǔ)氣程度為漸強(qiáng)。had better指一般性的建議，最弱。should&ought to含義相近，常可互換。區(qū)別在于，ought to常指特殊情況下的“應(yīng)當(dāng)”。Should則指一般情況。見(jiàn)例句。You ought to help him because he is in trouble now.(語(yǔ)氣強(qiáng)，有命令意味。)You should have a rest after finishing your sports.（一般性建議）have to have to 表示客觀需要去做的事情，意為“必須，不得不?！?I have to get the station ea

9、rly to catch the first train.We missed the bus so we had to walk home.We have to overcome all kinds of difficulties.Have to 有多種時(shí)態(tài)。常見(jiàn)的有：一般將來(lái)時(shí)We will have to gather at the school gate at 7 tomorrow.一般現(xiàn)在時(shí)I have to take more money with me because my girlfriend has so much to buy.一般過(guò)去時(shí)Finally, we had to

10、give up our idea to hold a picnic outside as it rained for a whole afternoon. have to （考點(diǎn)）Must they do? Yes, they must. No, they neednt/dont have to.must & have tomust have to主觀客觀 主觀 客觀時(shí)態(tài) 現(xiàn)在，將來(lái) 多種表推測(cè)詢問(wèn)意愿否定意禁止，不允許 不必 must表主觀意志，而have to表由于客觀因素不得不做完成的事情。Must沒(méi)有過(guò)去式，除在間接引語(yǔ)中可表示過(guò)去的時(shí)間。在直接引語(yǔ)中表示過(guò)去的時(shí)間用had to代替。

11、I told her that she must give up smoking.She said, “We had to get everything ready that night.”比較must & have toNeed I do ? Yes, you must. No, you neednt. dare & need情態(tài)動(dòng)詞實(shí)義動(dòng)詞dare否，疑，條 dare not do否,疑dont dare to do dont dare do不用于肯定句肯：dare to do need否，疑 neednt do (dont) need sth (dont) need to do肯：mus

12、t, have to, ought to, should注意對(duì)need問(wèn)句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.you mustyou needntyou dont have toneednt 對(duì)其它情態(tài)動(dòng)詞的回答:-Shall I tell John about it?-No, you _.-No, you _. -Must we do it now? -No, you _.-No, you _.needntdont have toneedntdont have toExercises高考鏈接1.-Is John

13、coming by train? -He should, but he _ not. He likes driving his car. (高考真題） A. must B. can C. need D. may2.It has been announced that candidates(候選人) _ remain in their seats until all the papers have been collected. (高考真題） A. can B. will C. may D. shall3.-I heard they went skiing in the mountains la

14、st winter. (高考真題） -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt bePractice 1: 高考考題專練1. I thought you _like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have l

15、ost C. should have lost D. must have lost3. I didnt hear the phone. I _asleep A. must be B. must have been C. should be D. should have beenB D B 4. There were already five people in the car, but they managed to take me as well. It _a comfortable journey A. cant be B. shouldnt be C. mustnt have been

16、D. couldnt have been 5. Its nearly seven oclock . Jack _be here at any moment. A. must B. need C. should D. could D C6. Did the train arrive in time?No. It _ two hours ago.A. must have arrived B. ought to have arrivedC. must arrive D. ought to arrive7. Must I drive to his house and pick up the child

17、ren? No, . A. you shouldnt B. you might not C. you neednt D. you mustntB C 8. We didnt see Tom at the meeting yesterday. He it. A. mustnt have attended B. cannot have attended C. neednt have attended D. would have not attendedB 9. There is someone knocking at the door. it be Tom? A. can B. must C. should D. ought toA 10. Two years ago, my husband bought me a bicycle. If you live in town, it is often faster than a car and you worry about parking. A. must notB. may not C. should