必修三Book3Unit2healthyeating语法
人教版 必修三 Unit 2 Healthy eating(语法与写作)教案-最新教学文档
教学过程一、复习预习依据语境记词汇单词拼写1.Don’t glare (怒视) at me like that; you deserved the scolding.2.The patient is recovering slowly; therefore, you had better choose some foods which digest (消化) more easily.3.This shop tries its best to meet the needs of its customers (顾客).4.This kind of fish d oesn’t need to be cooked.It can be eaten raw (生的).5.If you place orders now, we would give you a 5% discount (折扣).语境填词(用所给词的适当形式填空)1.Children are always curious about everything they see and hear.They will ask all kinds of questions curiously.To meet their curiosity,_we’d better answer them.(curiosity) 2.This new railway benefits this area in many ways.It is beneficial to the people living in this area.For the benefit of more people, we should build more railways.(benefit)3.The man looks strong,_but he hasn’t enough strength to lift the heavy box.He needs to strengthen his body.(strength)二、课堂导入复习上节课情态动词概念概念:在动词(一般动词)之前形成动词的否定,疑问,时态,语态,语气或表示特殊意义的动词叫做助动词,其中具有感情色彩一些助动词叫做情态动词。
必修三Unit2_Healthy_eating 2
栏目 导引
Unit 2
Healthy eating ——健康膳食
①(牛津P489)The letter wasn’t addressed to me but I opened it out of curiosity. 那封信不是写给我的,然而我出于好 奇把它拆开了。
栏目 导引
Unit 2
Healthy eating ——健康膳食
栏目 导引
Unit 2
Healthy eating ——健康膳食
③It is important to have_a_balanced,healthy_diet. 拥有均衡、健康的饮食很重要。 ④The doctor put him on a diet after operation. 手术之后,医生规定了他的饮食。
栏目 导引
Unit 2
Healthy eating ——健康膳食
①(牛津P1165)You could see from his face that he was lying.从他的表情上你 可以看出他在撒谎。 ②He didn’t finish his homework last night so he told_a_lie. 他昨天晚上没有完成作业,所以他说 了谎。
栏目 导引
Unit 2
Healthy eating ——健康膳食
解析:选B。考查情态动词。句意为: 约翰,你别打断我说话。你非得逼我 这时告诉你真相吗?根据句意可知选 B,must “非得,偏偏”。
栏目 导引
Unit 2
Healthy eating ——健康膳食
3.(2012· 昆明质量检测)You ________ finish the work today , for you still have three days left. A.won’t C.can’t B.mustn’t D.needn’t
高中英语必修三教案:Unit+2+Healthy+eating+Grammar1
LearnModel verbs
Finish the exercise
To get students familiar with model verbs.
To teach grammar knowledge of model verbs.
To check students’learning effect
在反意疑问句里,下面两种形式都可以:
He ought to be here, shouldn’t he?
He ought to be here, oughtn’t he?
2.have to & must
have to强调客观需要,有人称、时态的变化
而must则表示主观愿望、主观看法,只能用于一般现在时和一般将来时。
Step 3 Explanation
1.ought to
ought to意思是“应该”,是情态动词,只有一种形式,后边接动词不定式,to不能省略。ought to没有人称和数的变化,后接动词原形可以表示现在、将来或过去将来,由时间状语或上下文决定。
They ought to come tomorrow.
Step 1 Lead in
Enjoy a song, Nothing's Gonna Change My Love For You by Westlife.
Step 2Read the lyric again and pay attention to the sentences containing modal verbs and explain the meaning of each modal verb.
To consolidate what students have learnt in this class.
必修3 Unit 2 Healthy eating
【本讲教育信息】一、教学内容必修3 Unit 2 Healthy eating(一)重点单词(二)重点短语(三)重点句型二、知识精讲(一)重点单词1. diet1) n. 日常饮食、食物Proper diet and exercise are both important for health.适当的饮食和锻炼对健康都很重要。
The doctor advised him to go on a diet to lose weight.医生建议他节食减肥。
No sugar in my coffee please. I am on a diet.请不要给我的咖啡放糖,我在节食。
2)vi. 节食;实施节食疗法Do you think it necessary for me to diet?你认为我有必要节食吗?She’s always dieting but she never seems to lose any weig ht.她总是在节食,但体重好像并未减少。
2. balance1) vt. 平衡;权衡Try to balance your diet by eating more fruit and less protein.多吃些水果, 少摄入些蛋白质, 使饮食均衡合理。
You have to balance the advantages of living in the country against the disadvantages.你得权衡一下住在乡下的好处和坏处。
2) n. 天平,平衡;余额,余数Try to achieve a better balance between work and play.争取把工作和娱乐更好地结合起来。
I must check my bank balance.我要核对一下我在银行的余额。
Athletes need a good sense of balance.运动员要有良好的平衡感。
人教版 必修三 Unit 2 Healthy eating(语法与写作)教案
教学过程一、复习预习依据语境记词汇单词拼写1.Don’t glare (怒视) at me like that; you deserved the scolding.2.The patient is recovering slowly; therefore, you had better choose some foods which digest (消化) more easily.3.This shop tries its best to meet the needs of its customers (顾客).4.This kind of fish d oesn’t need to be cooked.It can be eaten raw (生的).5.If you place orders now, we would give you a 5% discount (折扣).语境填词(用所给词的适当形式填空)1.Children are always curious about everything they see and hear.They will ask all kinds of questions curiously.To meet their curiosity,_we’d better answer them.(curiosity) 2.This new railway benefits this area in many ways.It is beneficial to the people living in this area.For the benefit of more people, we should build more railways.(benefit)3.The man looks strong,_but he hasn’t enough strength to lift the heavy box.He needs to strengthen his body.(strength)二、课堂导入复习上节课情态动词概念概念:在动词(一般动词)之前形成动词的否定,疑问,时态,语态,语气或表示特殊意义的动词叫做助动词,其中具有感情色彩一些助动词叫做情态动词。
人教版高中英语必修三:Unit2 Healthy eating-语法篇(学生版)
Unit2 Healthy eating语法篇__________________________________________________________________________________ __________________________________________________________________________________要求学生掌握本单元的重点语法----情态动词表示推测的用法。
一、情态动词表推测:1. 大多数情态动词(除表‘能力、许可、意志’外),都可以表示推测,其程度有差异。
按可能性程度的高低排列为:must ﹥will ﹥would ﹥ought to ﹥should完全肯定完全可能很可能﹥can ﹥could﹥may ﹥might可能有可能2. 区分情态动词的否定含义:may not或许不、可能不might not可能不can’t 不可能mustn't不许、禁止shouldn’t不应该needn’t 不必3. 情态动词表推测具体运用:情态动词可以对现在、进行、过去推测。
4. 表示反劝的特殊的表推测形式5. 注意:二、情态动词表推测的反意疑问句1.情态动词表推测的反意疑问句,简单来说,就是以情态动词后的时态为淮,如句子里有明确的时间状语,则以其为准。
2.以must 为例:Eg.1. You must be hungry now,aren’t you?2. He must be watching TV,isn’t he ?3 Tom must have lived her for a long time,hasn’t he ?4. She must have arrived yesterday,didn’t she?注:如选择题中(以She must have arrived yesterday,didn’t she?为例)既有didn’t she又有hasn’t she则以didn’t she?为最佳答案。
Unit 2 Healthy eating(必修三)
Unit 2 Healthy eating(人教版必修三)一.重点词汇:diet spaghetti nut muscle protective bean pea cucumber eggplant pepper mushroom peach lemon balance barbecue mutton kebab roast stir fry stir-fry ought bacon cola sugary sign slim curiosity hostess raw vinegar lie customer discount weakness strength consult fiber digest poisonous carrot scurvy rickets obesity vitamin protein debt glare spy limit limited benefit breast garlic sign combine cooperation ingredient balanced diet ought to lose weight get away with tell a lie win…back earn one’s living in debt spy on cut down before long put on weight三.单元重点词汇讲解1. look forward to doing sth.2.“none/neither/either of…”构成的短语作主语的主谓一致⑴none of 后接可数名词,作主语时,谓语动词用单复数都可以;若接的是不可数名词,就用单数形式;e.g. None of us have/has ever been abroad.None of the money was paid to me.⑵neither/either of…构成的短语作主语,谓语动词通常用单数形式,但在口语中也可视为复数。
重点句型(必修3 Unit 2 Healthy eating)(讲义)
重点句型(必修 3 Unit 2 Healthy eating)(讲义)高中英语重点句型(必修3 Unit 2 Healthy eating)1. 学习句型,理解句型的含义。
2. 正确地运用句型,并能灵活地用于作文。
重点:“Nothing could be better,” he thought.He could not have Yong Hui getting away with telling people lies!难点:掌握由“have+宾语”之后非谓语动词形式的用法,本单元学到的是won’t / can’t have sb. doing sth,表示“不能允许某人做某事”。
【句型学习】1. “Nothing could be better,” he thought.他想:“再没有比这些更好吃的了。
”此句是形容词的比较级与否定代词nothing 连用,表示最高级的含义。
有此用法的常用否定词有:no, not, never, hardly, nothing, nobody等。
I can’t agree more.我非常同意(不能更同意了)。
I couldn’t have bought you a better gift.我给你买的礼物是最好的(不可能买个更好的了)。
表示最高级意义的几种特殊结构:(1)nothing(或no等)+比较级+than ...nothing(或no等)+so+原级+as ...It was not until then that I suddenly realized nobody was happier than I was.直到那时我突然意识到没有人比我更幸福with telling people lies!他可不能让咏慧哄骗人们却不受惩罚!have sb. doing 意为“让某人一直做某事或允许某人做某事”。
It is not a good idea to have the machine running all the time.让机器不停地运转不是个好主意。
人教版本高中英语必修三Unit2Healthyeating语言点
高中英语学习资料madeofjingetieji目知要点:diet,balance,offer,serve,discount,glare,consider,operate,combine,tired,hurry,frustrate,limi t要点短:cutdown,indebt,earnone’sliving要点句型nothingcouldbebetter⋯Whydon'tyoudo...?havesb.doingsth.知解要点【高清堂:要点】balance要点例句:Whatwillhappentoyouifyoudon ’tbalancedeatdiet?balance(n.)[U]均衡lose/keepone ’sbalancebeoffbalancesenseofbalance(2)[U,sing]均衡;均衡Pesticidesseriouslyupsetthebalanceofnature.balance[C]天平,秤Weighitonthebalance.(4)[Cususing]进出差,余Mybankbalanceisn’tgood.2)(v.)(1)(vt./vi.) (使⋯)保持均衡Howlongcanyoubalanceononefoot?Balancingmycupofcoffeeinonehand,Imanagedtoopenthedoor.(2)(vt.) 算tobalanceanaccountupset要点例句:Idon’twanttoupsetyou,butIfoundyourmenusolimitedthatIstoppedworryingandstartedadvertisi ngthebenefitsofmyfood.upset(upset,upset,upsetting)(adj.)不快的,心慌意乱的,烦忧的beupset(withsb.)(by/about/atsth.)Shewasreallyupsetaboutthewayherfathertreatedher.(2)(vt.)(upset,upset)弄翻;使心慌意乱Don’tdoanythingthatwouldupsethim.Heupsetabowlofsoup.benefit要点例句:Idon’twanttoupse tyou,butIfoundyourmenusolimitedthatIstoppedworryingandstartedadvertisi ngthebenefitsofmyfood.benefit(1)(vt.) 有利于sth.benefitsb.Thesefacilitieshavebenefitedthewholetown.(vi.)得益,获得好sb.benefitfromsth.Hehasn'tbenefitedfromtheexperience.(n.)好,益,帮助beofbenefitto=bebeneficialto ⋯Thenewregulationswillbeofgreatbenefit(=behighlybeneficial)tousall.forthebenefitof=forthebenefitofsb.Themoneyistobeusedforthebenefitofthepoor.diet【原句回放】Everybodyhastoeat,butdoyoueatahealthydiet?(P9)每一个人都必吃,但是你吃得健康?【点】dietn. 食,食be/goonadiet在食dietsb. =putsb.onadiet限制某人的食dietaryn. 定食(法)dieteticadj. 食的ThedoctorsaysI’vegottogoonadiet.医生我必食。
人教版高中英语必修三Unit2 Healthy eating语法篇同步讲义
Unit2 Healthy eating语法篇__________________________________________________________________________________ __________________________________________________________________________________要求学生掌握本单元的重点语法----情态动词表示推测的用法。
一、情态动词表推测:1. 大多数情态动词(除表‘能力、许可、意志’外),都可以表示推测,其程度有差异。
按可能性程度的高低排列为:must ﹥will ﹥would ﹥ought to ﹥should完全肯定完全可能很可能﹥can ﹥could﹥may ﹥might可能有可能2. 区分情态动词的否定含义:may not或许不、可能不might not可能不can’t 不可能mustn't不许、禁止shouldn’t不应该needn’t 不必3. 情态动词表推测具体运用:情态动词可以对现在、进行、过去推测。
4. 表示反劝的特殊的表推测形式5. 注意:二、情态动词表推测的反意疑问句1.情态动词表推测的反意疑问句,简单来说,就是以情态动词后的时态为淮,如句子里有明确的时间状语,则以其为准。
2.以must 为例:Eg.1. You must be hungry now, aren’t you?2. He must be watching TV , isn’t he ?3 Tom must have lived her for a long time, hasn’t he ?4. She must have arrived yesterday, didn’t she?注:如选择题中(以She must have arrived yesterday, didn’t she?为例)既有didn’t she又有hasn’t she 则以didn’t she?为最佳答案。
高一英语必修三:Unit+2+Healthy+eating+重点短语讲解+
Book 3 Unit 2 重点短语讲解1. In this way they cut down the fat and increased the fibre in the meal. (P15)【归纳】cut down削减,减少,砍倒。
【延伸】cut in插嘴;cut off切掉,隔绝;cut up切碎;cut across 抄近路穿过。
【易错点】注意cut down后面介词的使用,如果表示“削减,减少”时,后面可以跟介词on;如果表示“使……降低到”时,用to;如果表示“使……降低了”时,用by。
如:The doctor told my husband to cut down on smoking. 医生嘱咐我丈夫少吸烟。
You can cut the book down to 200 pages. 你可以把这本书减到200页。
2. It cost more than a good meal in his restaurant!(P10)【归纳】1. “more than +数词”意为“……以上”,如:I have known David for more than 20 years.2. “more than +名词”表示“不仅仅”,如:Jason is more than a lecturer; he is a writer, too.3. “more than +形容词/ 副词”意为“非常”,如:I am more than glad to help you.【延伸】rather than而不是;other than除了;less than很少,不到。
【易错点】no more than意为“只有,仅仅,不过(= only; just )”,强调“少”;not more than意为“至多,顶多,不超过”,其意义与at(the) most 相同。
3. Their balanced diets became such a success that before long Wang Peng became slimmer and Yang Hui put on more weight. (P15)【归纳】before long不久以后,很快。
人教版高中英语 Book3 unit2 healthy eating单元知识点总结
Book3 unit2 healthy eating一、知识点总结1)diet作名词,表示“日常饮食”。
be/go on diet节食作动词,表示“节食“。
2)区别energy,strength,power和force:energy主要指人的精力,工作或活动的能力,自然界的能等。
power主要指做一件事情所依靠的的能力,功能,人或机器等事物所潜在的或所发挥出来的力量,职权,权力或政权。
force主要指自然界中的力量,暴力,势力,说服力,压力,法律,道德或情感的力量,军事的力量。
strength指一人或一物所含的内在的力量,能用以从事,忍受,或抵抗很多事物。
3)balance作名词,表示“天平,秤;平衡,平稳“。
be/hang in the balance不确定的,尚未决定的;keep one’s balance保持平衡;on balance考虑周全,总的来说;strike a balance找出折中办法,妥协; 作动词,表示“权衡,平衡”;balance A against B权衡利弊。
4)sign 作名词,表示“记号,符号,标志,标记,手势,迹象,指示牌”等。
作动词表示“签名,签署,示意,做手势”。
in sign of作为……的记号;表示……的。
sign for签约应聘或受雇 ;sign for sth签收某物;sign sb on/up使某人签约受雇5)sigh :sigh over为……叹息;sigh for想念,思念;sigh out/forth sth边叹息边说出……6)slim 作形容词,表示“苗条的,纤细的,小的”。
作动词,表示“变细,减肥”。
slim down 减肥,缩减。
7)lie 作名词,表示“谎言,谎话,假象”是可数名词。
若表示说谎,只能tell lies或者tell a lie。
a white lie无恶意的谎言;throw a lie in sb’s face当面斥责某人说谎8)rid :rid sb/sth of,使某人或某物摆脱……,get rid of摆脱,除出;be rid of=rid oneself of 除去,摆脱9)debt :be in debt欠债;be out of debt不欠债;get/run into debt负债;be deep/deeply/heavily in debt负债累累;pay/back/repay one’s debt偿还债务10)区别glare,gaze,stare,glance: glare指怒视,强调敌对或者威胁的态度。
人教版高中英语必修三:Unit2 Healthy eating-语法篇(教师版)
Unit2 Healthy eating语法篇__________________________________________________________________________________ __________________________________________________________________________________要求学生掌握本单元的重点语法----情态动词表示推测的用法。
一、情态动词表推测:1. 大多数情态动词(除表‘能力、许可、意志’外),都可以表示推测,其程度有差异。
按可能性程度的高低排列为:must ﹥will ﹥would ﹥ought to ﹥should完全肯定完全可能很可能﹥can ﹥could﹥may ﹥might可能有可能2. 区分情态动词的否定含义:may not或许不、可能不might not可能不can’t 不可能mustn't不许、禁止shouldn’t不应该needn’t 不必3. 情态动词表推测具体运用:情态动词可以对现在、进行、过去推测。
4. 表示反劝的特殊的表推测形式5. 注意:二、情态动词表推测的反意疑问句1.情态动词表推测的反意疑问句,简单来说,就是以情态动词后的时态为淮,如句子里有明确的时间状语,则以其为准。
2.以must 为例:Eg.1. You must be hungry now,aren’t you?2. He must be watching TV,isn’t he ?3 Tom must have lived her for a long time,hasn’t he ?4. She must have arrived yesterday,didn’t she?注:如选择题中(以She must have arrived yesterday,didn’t she?为例)既有didn’t she又有hasn’t she则以didn’t she?为最佳答案。
人教版高中英语必修三Unit2HealthyEating语法探究.docx
高中英语学习材料***鼎尚图文理制作***Unit 2 Healthy Eating语法探究1. must 的主要用法。
⑴表示必须、必要We must do everything step by step .我们必须按部就班地做一切事情。
⑵must be + 表语的结构,通常表示猜测,含有“一定”之意。
(只用在肯定句中)He must be an honest boy. 他一定是个诚实的男孩。
must +have +过去分词的结构,常用在肯定句中,表示对过去发生行为的推测,含有“一定”、“准是”的意思。
否定和疑问句用can。
She must have studied English before.她以前一定学过英语。
⑶must 的否定式有两个:当回答由must引起的问题时,否定答复要用needn’t或don’t have to表示“不必”、“无须”、“用不着”、“不一定”的意义。
当表示“不应该”、“不许可”、“禁止”时,就用must not。
Must I go tomorrow? 明天我必须去吗?Yes, please.是的,请吧!No , you needn’t. 不,你不必去。
2. have to 的主要用法⑴have to 有人称和数的变化,可用于多种时态中:一般现在时中当主语是第三人称单数时要用has to,其余的人称用have to,一般过去时中要用had to;一般将来时中则要用will have to.She has to go to school by bus. 她不得不乘公共汽车上学。
You'll have to see the doctor if you get ill. 如果你生病了,就得去看医生。
⑵have to 的否定句和疑问句的构成往往要借助于助动词do的适当形式或助动词will即have to, has to, had to和will have to的否定式分别为don't have to, doesn't have to, didn't have to 和won't have to,疑问句是在句首加助动词do的相应形式,句中还原成have to或把will放到句首。
重点句型(必修3 Unit 2 Healthy eating)(讲义)
1. 学习句型,理解句型的含义。
2. 正确地运用句型,并能灵活地用于作文。
重点:“Nothing could be better,” he thought.He could not have Yong Hui getting away with telling people lies!难点:掌握由“have+宾语”之后非谓语动词形式的用法,本单元学到的是won’t / can’t have sb. doing sth,表示“不能允许某人做某事”。
【句型学习】1. “Nothing could be better,” he thought.他想:“再没有比这些更好吃的了。
”此句是形容词的比较级与否定代词nothing连用,表示最高级的含义。
有此用法的常用否定词有:no, not, never, hardly, nothing, nobody等。
I can’t agree more.我非常同意(不能更同意了)。
I couldn’t have bought you a better gift.我给你买的礼物是最好的(不可能买个更好的了)。
表示最高级意义的几种特殊结构:(1)nothing(或no等)+比较级+than ... nothing(或no等)+so+原级+as ...It was not until then that I suddenly realized nobody was happier than I was.直到那时我突然意识到没有人比我更幸福了。
(2)never+比较级What an interesting novel!I have never read a more moving one.=It’s th e most moving novel that I have ever read.多么有意思的小说!我从来没看过比这更动人的小说。
(言外之意,这是最动人的)(3)比较级+than +any other +单数名词 (all ) the other +复数名词any of the other +复数名词 anyone elseThe book has a greater effect on me than any other book / all the other books / any of the other books.这本书对我影响最大。
人教版高中英语必修三Unit2Healthyeating课文知识点解析
frustrated.
王鹏伟坐在他空荡荡的餐馆里,感觉很失落。
feeling 现在分词,作伴随状语。 e.g.Standing on the top of the hill
, you can have a better
view of the city.
站在山顶上,你能更好地看到这个城市 .
Jeff shouted , seizing her arm.
Can you taste the garlic in this soup
?
你尝得出汤里有大蒜味吗?
taste 可用作连系动词,后接形容词作表语。 The wine tastes nice. 酒的味道不错。
4.Suddenly he saw his friend Li Maochang hurrying by.
他的热而不腻的米饭。
taste of sth.
有某种味道
e.g.It tastes strongly of mint.
它有挺重的薄荷味。
taste 能辨别 ( 味道);尝出,品出。 ( 不用于进行时,常与 can 连
用)
e.g.I can ’ t taste.I ’ ve got a cold.
我得了感冒,尝不出味来。
prices.
王鹏伟感到很吃惊,尤其是饭菜的价格。
be amazed at... 对……感到吃惊
e.g.We were amazed at the news.
听到这个消息我们很吃惊。
amaze v. 使某人惊讶、惊奇 ( 多用于被动)
e.g.He amazed everyone by passing his driving test.
long walk.
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2.can have done一般用于疑问句和否定句中,用于表示 对过去所发生事情的推测。could have done用于肯定句时,表 示“本有能力做某事而未做”。
她昨天本不必来。(实际上来了)
②She didn't need to come yesterday.
她昨天不必来。(实际上也没来)
二、难点突破 情态动词+have done的用法 1.must have done用于肯定句,表示“过去一定做过某 事”。
She must have been very beautiful when she got married. 她结婚时一定很漂亮。
侧重客观需要;有时态、人称和数的变化 说话人的主观看法
①I have to go now, for my mother is ill. 现在我不得不走了,因为我妈妈生病了。 ②I must stop smoking. 我一定要戒烟。
名师点拨 have to的否定式为don't have to,表示“没有义务或没有必 要做某事”,意为“不必”,常可以回答must提问的一般疑问 句。而must的否定式mustn't表示“禁止”。 ①They don't have to worry about the nuclear radiation. 他们没有必要担心核辐射。 ②You mustn't come here without permission. 未经允许,你不能来这儿。
3.need的用法 (1)need作情态动词时,后跟动词原形,表示“需要,有必 要”,无人称和数的变化,多用于否定句、疑问句或条件句 中。如: ①You needn't go there now. 你现在不必去那儿。 ②Need I go there now? 我现在需要去那儿吗?
名师点拨 由need引导的一般疑问句的肯定回答常用must或have to, 否定回答常用needn't或don't have to。 —Need I hand in my paper now? 我现在需要交上论文吗? —Yes, you must./No, you needn't (don't have to). 是的,你必须。/不,你不需要。
2.have to的用法 have to“不得不”。有时态、人称和数的变化,其否定形式 和疑问形式需要借助助动词do。如: His mother is ill. He has to stay at home to look after her. 他妈妈病了,他得待在家里照顾他。 易混辨析
have to must
The house needs/wants/requires repairing/to be repaired. 这所房子需要修葺。
易混辨析
needn't have 表示过去本来没必要干某事而实际
done
上却干了。
表示过去没必要干某事而实际上也 didn't need to 没有干。
试比较:
①She needn't have come yesterday.
Unit 2 Healthy eating
Unit 2
第二课时 Learning about Language 情态动词(Ⅱ)
观察句子,写明情态动词的用法。 ①By now his restaurant ought to be full of people. (ought to意义:_应_该__;此处指__按__理_应_当__如_何___,具有一定 的针对性)
(2)作为实义动词,同其他实义动词一样,可用于各种句 式,有时态、人称、数的变化,构成否定句和疑问句时要借助 于助动词do。
①We need to help him. 我们得帮助他。 ②We don't need to tell him the truth. 我们不必告诉他真相。
名师点拨 当need作“需要”讲时,其后跟不定式的被动形式相当于 跟v.ing的主动形式,在这一点上,与want和require作“需要” 讲时一样。v.ing的主动形式表被动含义,need的动作执行者是 动词ing形式的承受者,因此必须是及物动词的ing形式,若为 不及物动词其后应跟介词。
②What could have happened? (could have done用于_疑__问_句__,表示对_过__去_发__生_动__作_的猜测)
③Something terrible must have happened. (must have done用于_肯_定__句_,表示对_过__去_发__生_动_作__的肯定推 测)
名师点拨 用ought to表示 能 性 ( 与 should 表 推 断 时 相 似 ) , 有 时 可 译 为 “ 准 是”(但语气比must要弱)。 (3)ought to的否定形式为ought not to或oughtn't to,其一般 疑问句形式是将ought置于主语前。 You oughtn't/ought not to scold him. 你不该责备他。 (4)在附加疑问句中,ought(n't) to中的to要省去。在美语中 常用shouldn't代替oughtn't。 We ought to go now, oughtn't/shouldn't we? 我们现在该走了,是吧?
④He could not believe his eyes. (could意义:__能__够____,强调___能__力___)
一、基础点拨 1.ought to的用法 (1)ought to“应该”。与should相比较ought to语气重,偏重 “责任,义务,道德,法律”等方面。如:
To keep fit, we ought to learn more about our body. 为了保持健康,我们应该多了解我们的身体。 (2)ought to还可表示可能性。如: It ought to be a close game. 那很可能是场势均力敌的比赛。