人教版高中英语-Book3-unit2-healthy-eating单元知识点复习总结
必修三Unit2 Healthy Eating知识点

必修三Unit 2 Healthy eating知识点详解单元要点预览词汇部分词语辨析1. diet / food2. offer / provide / supply3. strength / power / force4. glare / stare / glance词形变化1. health n. 健康healthy adj.健康的;有益健康的healthily adv. 健康地2. sugar n.糖vt.在……中加糖sugary adj. 甜的,含糖的;甜言蜜语的3. curiosity n. 好奇心curious adj. 好奇的curiously adv. 好奇地4. weakness n.虚弱,衰弱,软弱;弱点,缺点weak adj.虚弱的;(能力等)差的;微弱的weaken v.(使)变弱,(使)减弱5. strength n. 力气;长处strengthen vt. 加强;巩固strong adj. 强壮的;牢固的6. digest vt.消化;吸收,领悟n.文摘digestion n.消化(力) digestive adj.消化的,易消化的7. benefit v.& n. 有益于;得益于;利益,好处beneficial adj. 有益的重点单词1. balance n. 天平,平衡;余额,余数v. 平衡;权衡2. curiosity n. 好奇心3. limit vt.&n. 限制;限定4. benefit vt. 有益于;vi. 得益于(常与from, by连用) n. 利益,好处;津贴5. combine vt.&vi. (使)联合;结合重点词组1. be tired of 对……厌烦了2. ought to aux. 应当;应该(没有人称和数的变化,后接动词原形)3. lose weight体重减轻;减肥4. get away with偷携某物潜逃;受到(较轻的惩罚)或逃避惩罚5. tell a lie 说谎6. earn one’ s living谋生7. in debt 欠债8. before long 不久以后重点句子1. Nothing could be better.2. Something terrible must have happened if Maochang was not coming to eat with his as he always did.3. He couldn’t have Yong Hui getting away with telling people lies.重点语法1.情态动词的完成式的用法2.双重性情态动词的用法(见语法部分)语言要点(模块)Ⅰ.词语辨析1. diet / food【解释】diet 指通常吃的食物,尤指规定的食谱【如治疗疾病或减轻体重的食物】,还可作动词“节食”。
人教高中英语 必修三 Unit 2 Healthy eating词汇讲解(共40张PPT)

2.a balanced diet
balanced adj. 均衡的,平衡的 balance n. 平衡,均衡;天平 vt.平衡,权衡 keep one’s balance lose one’s balance 保持平衡 失去平衡
看图造句
lost her balance and fell over. She_______________
3.If you have questions,you can consult your dictionary.
归纳总结: consult vi. & vt. 1)咨询,请教; 2)商量; 3)查阅; consult sb. (about…)向…咨询/请教 consult with sb (about…)与…商量; consult +工具书=refer to/turn to+工具书 =look up+sth. +介词+工具书
一言辨义
consult consult the • Will you_______your teachers or _______ dictionary or ___________your classmates consult with about it when you come across a new word.
weakness 缺点,弱点
Each of us has our own strengths and weaknesses. ② She didn’t have the strength to walk.
①
Political power depends upon economic strength. ③
Unit 2 Healthy Eating
高中英语人教版必修3Unit 2 Healthy eating 课件PPT

根据上文判断正(T)、误(F) 1.We should eat a balanced diet to keep healthy.( T ) 2.To keep healthy,you mustn’t eat fish.( F ) 3.You must eat the food which is cooked every day.( F ) 4.There are no people who are going hungry in the world.( F )
5. lie n.谎话;谎言 vi.说谎
6. customer n.顾客;消费者 7. discount n.折扣 8. weakness n.缺点;虚弱;弱点
weak adj.虚弱的 9. strength n.强项;长处;力量
strong adj.强壮的
Ⅱ.重点短语
1. balanced diet平衡膳食 2. ought to 应当;应该 3. lose weight 减肥;体重减轻 4. be amazed at 对……吃惊 5. get away with (做坏事)不受惩罚;受到从轻发落 6. tell a lie 说谎 7. keep fit 保持健康 8. win...back 赢回;重新获得
Something terrible must have happened if Li Chang was not coming to eat in his restaurant as he always did . 要是李昌不像往常一样到他的饭馆吃饭,那么一定是发生了一些严重的 事情。
He could not have Yong Hui getting away with telling people lies! 他可不能让雍慧哄骗人们后跑掉!
人教版高中英语(必修 3)Unit 2 Healthy Eating

人教版高一英语必修3:Unit 2 Healthy EatingWarming up1. eat a healthy diet有健康的膳食drink sugary drinks喝含糖份饮料go on a diet 节食;控制饮食be on a diet 在节食put sb. on a diet让某人节食2. in different ways以不同的方式3. fast energy foods快能量食物full of energy 精力充沛devote/apply one’s energy to sth致力于某事4. slow energy foods慢能量食物5. grow bones and muscle促进骨骼和肌肉的生长6. body-building foods强身健体的食物7. provide sb. with sth./ provide sth for sb. / supply sb sth =supply sth to sb.为某人提供某物provide for 提供生计;赡养offer sb. sth= offer sth to sb.主动向某人提供某物offer sb. some money for sth向某人出价多少钱买某物8. protective foods 保护食品;防护食品;保健性食品9.eat a balanced diet吃平衡的膳食Pr-reading, reading and comprehending11 feel/ get frustrated at 因…..而懊恼的be frustrated with对…..感到沮丧的12. by lunch time到午饭时分13.ought to do sth应该做某事;应当做某事14.hurry by匆匆走过15.fallow sb. into a newly-opened small restaurant跟着某人进入一家新开的小餐馆16.be tired of…讨厌…. ;厌倦get/be tired with/from…因…..而疲乏;be tired out很累;很疲倦17.make yourself thin again让你自己再次恢复苗条18.couiosity about sth对某事的好奇心curiosity to do sth做某事的好奇心out of curiosity出于好奇show curiosity about sth对某物表现出好奇be curious about sth对某事/某物感到好奇be curious to do sth 很想做某事19. drive sb. inside驱使某人走进去20. be fit 保持健康stay healthy/fit保持健康21. in、during two week在两周内22. raw vegetables生蔬菜23.be amazed at…..对(因)…..感到吃惊(惊奇)24.throw away扔掉;甩掉25. think about 考虑;想起26.find out 查明;弄清楚27.have sb doing sth让某人一直做某事28. get away with(doing) sth(做坏事)不受惩罚;被放过get rid of摆脱29.tell a lie / lies to sb =lie to sb.对某人撒谎lie with sb (to do sth)(做某事)是某人的职责30. do some research into…作…….一些调查研究31.at/in the library在图书馆里32.far too much…..太多的…..33.energy-giving foods能够提供能量的食物34. at a discount of….. 打…..折35.win his customers back赢回他的顾客36.all day=all the day =the whole day一整天37.the competition between A and B 在A和B之间的竞争38.be on 开始了39.the weakness of…的缺点40. the strength of…的优点Learning about language and using language41. lose weight/become thinner 体重减轻;减肥42. lose face 丢面子lose heart 灰心,失去信心43.consult sth /sb.查阅某事物/请教某人consult sb about sth就某事向某人咨询consult with sb与某人交换意见;商议take some exercise做一些锻炼;锻炼go to the gym for exercise去体操房锻炼44. be unwilling to do sth 不愿意做某事45. earn one’s living谋生46. look forward to doing sth期望/盼望做某事46.be in debt欠债47.at the door在门口48. glare at瞪着某人;怒目而视某人49.the other day前几天50. spy on打探;侦查;暗中监视51. advertise the benefits of宣传…的好处52. try a meal吃顿饭eat three meals a day一天吃三餐53. feel sick觉得难受54.it would be better if ….如果……会更好一些(表示委婉地提出建议)55.talk about sb/ sth= chat about sb / sth 谈论某人/某事56.. in this way=by this means=with this method以这种方式;用这种办法57. combine A an/with B把A和B联合起来combine with sth 和某事结合起来58. cut down减少;删节;消减59. their business cooperation生意上的合作60. ever after从此以后一直60 buy food in packets or tins购买有外包装或听装的食物Workbook61.eat properly吃的合理;the proper amount of…合适的量62.carry on in her own way以她自己的方式进行63. a ripe apple一个熟苹果64.be overweight超重了65. take a balanced point of view towards…对…持一种平衡的观点66.There is no time limit. 没有时间限制67.a large fast food chain of restaurants一个巨大的快餐店链68.be for and be against支持或反对69.be of high quality有很高的质量70.make a promise to做出一个承诺71.nothing but只是72.enjoy our local dishes享受我们自己本土的菜肴73.high levels of fat, sugar and salt高脂肪,高糖份,高盐份74.on the other hand另一方面75from elsewhere从别处来76.the food containers盛食物的容器77.on the side of the road在路边78.throw… on the ground扔到地上79.treat… fairly公平对待80.speak up for the workers为工人说话81.join a Union参加工会。
必修3 unit 2 Healthy Eating知识点分析

Book3 Unit 2diet1diet n.日常饮食;规定的食物;食谱be /go on a diet The doctor said I should go on a diet.vi.节食I've been dieting for three months and I've lost 5 kilograms.—Do you have ________sweet tooth?—I used to, but now I'm on________diet.A.a; the B./; aC./;/ D.a; a2.protect protection protective3.balancen.天平,平衡结余;余额a sense of balanceKeep a balance between A and Bkeep one’s balance保持平衡lose one’s balance失去平衡out of balance失去平衡V 平衡权衡Balance A against BHe can balance a ball on his finger.balanced adj. 平衡的;和谐的;安定的Keep a balanced diet4.lose weight 体重减轻;减肥put on/gain weight 体重增加watch one's weight控制体重5.curiosity n.好奇心;好奇satisfy one's curiosity满足某人的好奇心out of curiosity出于好奇show curiosity about sth Will you satisfy my curiosity and tell me how much it costs?The reporter asked the famous singer some personal affairs out ofcuriosity.curious adj. 对……好奇的curiouslybe curious about sth. 对……感到奇怪/好奇的be curious to do sthIt is curious ( 奇怪的)that...(should do/shouldhave done)It is curious that he should have failed to win the race6. raw adjraw dataraw meata raw beginnerraw materials未加工的自然状态的. 无经验的不熟练的. 生的未煮的. 未经处理的原始的7. get away with偷走(做坏事)不受惩罚/受轻微的惩罚Those who lie and cheat will never get away with it. For such a serious mistake he was lucky to get away with a fine.Get away from逃离摆脱避免Get across被理解把..讲清楚He is not very good at getting his idea across. 1).I’ve___ the habit of calling grandparents on my way home from school. Come into gone into got into run into.2).The manager tried to explain the problem,but he didn’t ____ to the players.Get away with get over get down get across8. Lie-lied-lied-lying说谎Lie- lay- lain -lying躺;卧;位于Lay- l aid-laid-laying放置;产卵A white lietell a lie/lies to sb.=lie to sb向某人撒谎lie in在于His failure lies in his laziness.A little boy, who lay under the tree, lied to his mother that his cock laid an eggand the cock laid the egg on its back, running away.But I want to buy it at a discount of 20%.At a 20% discount.9.win…back赢回;重新获得The party must try to win back the support it has lost.It will be an easy thing for you to win back your kingdom of England.He won them back with a discount.10.strength (C)长处;强项;(U)力量Build up one’s strength He is a man of great strength.He thought crying was a sign of weakness.It’s important to know your own s trengths and weaknesses. strengthen vt.增强;加强They decided to strengthen the defense oftheir country.11.consult vt.咨询;请教vi.商量consult sb (about sth)向某人请教consult with sb (about sth) 与某人商量Julie did well in the exambecause she often consulted her teacher.I must consult with my parents about it.I c onsulted the dictionary =I looked it up in the dictionary.Refer to a dictionary.12.debt 债务;债get into debt陷入债务be in (heavy) debt 负债(累累)pay off all the debts 还清债务(动作)be out of debt不欠债(状态)13. glare vi.怒目而视;闪耀(刺眼)n. 怒视;炫目的光He glared fiercely at us as he spokeHe had to wear sunglasses because of the glare of the sun.Stare at(粗鲁无礼地)盯着看Give a glance at有目的的匆匆一瞥Get a glimpse of碰巧一望Peep at偷看或小孔窥视14.limit vt. 限制;限定n. 界限;限定limit … to把……限制在……内Go beyond/over the limit超过限度within the limits of 在……范围内Set a limit toLimited adj有限的be limited to受限制于limitation n.限制⑴ I shall______himself________ three aspects of the subject.⑵ Families ______________4 free tickets each.⑶ You can’t drive --you’re_______________.15.benefit vt&vi 有益于;受益于n. 利益;好处benefit from/by从……受益,得益于benefit sb对某人有益get benefit from 从……受益,得益于be of great/much/no benefit to sb对某人有益处for the benefit of为了……的利益beneficial adjbe beneficial to sbThat experience was of great benefit to me. I havebenefited a lot from it. I will work harder for the benefit of the company.1.Plenty of exercise every day is___ to our health.A.benefitB. benefit fromC. of great benefitD. great beneficial2.We will ____learning a foreign language.A. benefitB. benefit fromC. get a lot of benefit fromD. B and Cbine vt&vi (使)联合;(使)结合combine A with/and B使AB结合起来combine against …联合起来反对The trip will combine business with pleasure. Some films combineeducation with recreation. They combined against a common enemy.___ the ladder ___ the other so that you can climb high enough.bine…withB. Connect …with17.cut downNow more and more trees are cut down to build houses.We need to cut the article down to 1000 words. The doctor told him to cutdown on his drinking.I won’t have a cigarette,thanks.---I’m trying to cut down.Cut down(自根基)砍倒消减减少(数目数量尺寸)改短夺去生命Cut across抄近路Cut through 抄近路穿过Cut away切除剪掉Cut in插嘴超车抢道Cut off切断割断剪断中断供应与..外界隔绝Cut out切除剪下戒掉删去(自动)关掉Let’s cut out unimportan t details.Cut up1). The town is ___fromthe rest of the country because of the heavy snow.A. cut downB. cut outC. cut offD. cut up 2). Our teacher advised you to ___ the article that is too long so as to make itfit the space.A. cut awayB. cut throughC. cut upD. cut down18.before long19.不久以后We’ll be home beforelong .Before long he had to move on.He had taken a doctor’s degree long before.He had come to America long before the war.It wasn’t long before shehad persuaded him.课本知识点1.句型1、Nothing could be better…(P10)再没有比这些更好吃的了……当not, never, nothing等否定词与比较级连用时,表示“再也没什么比这更……的了”。
新人教版必修三英语unit 2 healthy eating 词汇讲解 ppt课件

a balanced diet
均衡的饮食
—Why do you eat all the vegetables but leave
_______meat untouched?
—I'm on
diet.
A.a; the B.the;/
C./;a
D.the; a
【解析】 D 考查冠词用法。和前面的vegetables一 样,这里的meat表特指,所以第一空用定冠词the;第 二空on a diet为固定短语,意为“节食”。
(1)你必须限定饮食,因为你太胖了。 You must _g_o__o_n__a__d_ie__t ___ because you're too fat.
(2)请不要放巧克力,我正在节食。 Don't add chocolate, please._I'_m__o_n__a__d_i_e_t_/d__ie_t_in__g__.
(2) As a consultant she still needed _t_o_c_o_n_s_u_lt_a_l_a_w_y_e_r _a_b_o_u_t __
_h_e_r_d_i_vo_r_c_e__ (咨询律师有关她离婚的 事).
(3) I think it's better __to__c_o_n_su_l_t _w_i_th__yo_u_r_p_a_r_tn_e_r_a_b_o_u_t____ (与你的合伙人商议)the matter. (consult)
health.
2. diet n.日常饮食;规定饮食v.节食
go/be on a diet 节食 a healthy and balanced diet
健康和均衡的饮食
高中英语 B3 unit 2 Healthy Eating 整单元教案 新人教版必修3

教学课题:Unit2 HEALTHY EATING Period1.Warming-up and Pre-reading授课课时:1教学目的:1.了解什么是均衡饮食2.了解食品三种分类3.预测课文内容教学重点:1. 了解均衡饮食养成良好的饮食习惯教学难点:1.预测课文内容教学步骤:STEP1:Warming-up1.In Unit1 we have learnt many festivals around the world. Can you list them? Can you tell uswhat we’ll eat in these festivals?Answer: eg: We’ll eat Zongzi in Dragon Boat Festival.We’ll eat turkey in Christmas.目的:回顾上单元的内容同时引出第二单元有关食物的内容。
2.Game:Let’s have a check. Look who knows the most food. We’ll name this food group by group.3.Every one has his favorite food. Garfield like Spaghetti and collar of brawn best. What aboutyou? What food do you like best?Do you know whether you eat a healthy diet or not?4.Proverb:There is a proverb about food: “You are what you eat!” Please choose the best explanation for this proverb.A.You will become what we eat.B. Your health is decided by what you eat.C. You should buy and eat nutritious food.D. What you eat can make you healthy.Answer: B. 吃什么长什么。
人教版高中英语必修三:Unit2 Healthy eating-语法篇(学生版)

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、4. 表示反劝的特殊的表推测形式1). could + have + P.P.表示本来能做到,但事实上没有做到。
He could have finished the task on time, but the heavy snow came.2). couldn’t +have + P.P.表示本来不能做到,但已经做到了。
She could not have covered the whole distance, but in fact she arrived ahead of time.3)needn’t + have + P.P.表示本不必做的,但已经做到了。
She needn’t have attended the meeting yesterday, but she did.4.) should/ought to +have + P.P.表示该做而没有做The plant is dead. I should/ought to have given ot more water.5)shouldn’t/ oughtn’t to +have + P.P.表示不该做而做了。
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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。
Stare 指睁大眼睛出神地看,注视,瞪视,这种注视出于惊讶,好奇,羡慕,恐惧,有时是粗鲁无礼的。
glance指瞥视,匆匆一看。
gaze指目不转睛地看,凝视,注视,这种注视是由于惊奇,喜欢或兴趣所致。
11)limit 作动词,limit…to,把……限定在……范围内。
作名词,常与介词to连用。
形容词limited表示“有限的,极少的,12)benefit 作动词,表示“使……受益”。
benefit from/by。
从……中受益be of benefit of 对……有益,对……有利。
13)有关get的短语:1. get about(around)(1) (能)到处走动,旅行。
(2) (消息、谣言等)传播,流传。
2. get along (1) 离开(某地)。
(2) 相处,过日子,合得来。
(3) 进展。
3. get away (1) 离开,逃离,逃走。
(2) 逃避责罚,免受处罚,受较轻处罚。
4. get back (1) 返回,回家。
(2) 取回,拿回,失而复得。
5. get down 下来,取下,放下,弄下,写下,打下,吞下。
6. get down to (6doing) sth 开始做某事,认真处理某事。
7. get in (1) 进站,到达,回来。
(2) 请来。
(3) 插话。
(4) 收获,收割。
8. get off (1) 起飞,动身,出发。
(2) 下班,下车。
(3) 从轻处罚,被放过。
9. get on (1) 上车。
(2)进行,进展,过日子。
(3) 相处。
10. get out (1) 出来,出去,离开。
(2) 拿出,取出。
(3) 出版,发表。
(4) 泄漏,传出。
11. get out of (1) 逃避,躲掉。
(2)为了逃避工作,使说出(拿出)。
(3) 放弃,戒除,停止。
12. get over (1) 走过,越过,渡过。
(2) 克服,战胜。
(3) 恢复,痊愈。
13. get through (1) 做完,用完,吃完,看完。
(2) 通过(考试),接通(电话),度(时间)。
14. get together 聚会,联欢。
15. get up (1) 起床,起身。
(2) 打扮。
(3) 举办。
16. get doing (1) 继续做某事。
(2) 开始做起某事来。
17. get sth done 使某事被做。
注:有时表示遭遇。
18. get to do sth (1) 开始做某事。
(2) 有机会做某事,设法做成某事。
二、重点语法can和could的用法:1.表示能力或客观可能性,还可以表示请求和允许。
注意:①could也可表示请求,语气委婉,主要用于疑问句,不可用于肯定句,答语应用can(即could不能用于现在时态的简略答语中)。
②can表示能力时,还可用be able to代替。
2.表示惊异、怀疑、不相信的态度。
(主要用在否定句、疑问句或惊叹句中)3.“can(could) + have + 过去分词”的疑问或否定形式表示对过去发生的行为怀疑或不肯定。
4. 用在疑问句及否定句中,表示惊讶,不相信等。
5. cannot…too\enough表示“无论怎样……也不过分”,“越……越好”。
may和might的用法:1.表示许可。
表示请求、允许时,might比may的语气更委婉一些,否定回答时(口语中常用) no , you can’t . or , yes, please 用mustn’t表示“不可以”、“禁止”、“阻止”之意(具有强烈禁止的意思)。
用May I…征询对方许可在文体上比较正式,在口气上比较客气。
在日常口语中,用Can I … 征询对方意见在现代口语中更为常见。
2.用于祈使句中表示祝愿。
3.表示推测、可能(疑问句不能用于此意)。
4.“may(might) + have + 过去分词”表示对过去发生的行为的推测。
must和have to的用法:1.表示必须、必要。
(must表示主观多一些而have to则表示客观多一些);回答must 引出的问句时,如果是否定的回答,不能用mustn’t,而要用needn’t或don’t have to。
2.“must be + 表语”的结构表示推测,它的否定或疑问式用can代替must。
3.“must + have + 过去分词”的结构常用在肯定句中,表示对过去发生的行为的推测。
它的否定或疑问式用can代替must。
4. have to的含义与must相似,两者往往可以互换使用,但have to有各种形式,随have 的变化而定。
must与have to有下列几点不同:① must表示的是说话人的主观看法,而have to则往往强调客观需要。
② must一般只表现在,have则有更多的时态形式。
③二者的否定意义不大相同。
④询问对方的意愿时应用must。
注意:have to也可拼做have got to。
dare和need的用法:1.need表示“需要”或“必须”,作情态动词时,仅用于否定句或疑问句中,在肯定句中一般用must, have to, ought to,或should代替。
注意:needn’t + 不定式的完成式“表示本来不必做某事而实际上做了某事”2.Dare作情态动词时,主要用于疑问句、否定句和条件从句中,一般不用在肯定句中。
3.Dare和need常用作实义动词,有时态、人称和数的变化,所不同的是,作实义动词时,在肯定句中,dare后面通常接带to的不定式,在否定和疑问句中,dare后面可接带to或不带to的不定式。
shall和should的用法:一.shall的用法:1.shall用于第一人称,表示征求对方的意愿。
2.shall用于第一、第三人称疑问句中,表示说话人征求对方的意见或向对方请示。
33.. shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁。
二.should的用法:1.should表示劝告、建议、命令,其同义词是ought to;在疑问句中,通常用should代替ought to。
should的含义较多,用法较活,现介绍三种其特殊用法。
情态动词should 用于第一人称时可以表示说话人的一种谦逊、客气、委婉的语气。
should还可以用在if 引导的条件从句,表示一件事听起来可能性很小,但也不是完全没有可能。
相当于“万一”的意思。
从句谓语由should加动词原形构成,主句谓语却不一定用虚拟语气。
此外,Why(or How) + should结构表示说话人对某事不能理解,感到意外、惊异等意思。
意为“竟会”。
2.“should + have + 过去分词”结构一般表示义务,表示应该做到而实际上没有做到,并包含一种埋怨、责备的口气。
will和would的用法:1.表示请求、建议等,would比will委婉客气。
2.表示意志、愿望和决心。
3.用“will be”和“will(would) + have + 过去分词”的结构表示推测,主要用于第二、三人称。
前者表示对目前情况的推测,后者表示对已经完成的动作或事态的推测。
4.would可表示过去反复发生的动作或某种倾向。
would表过去习惯时比used to正式,并没有“现已无此习惯”的含义。
5.表料想或猜想。
ought to的用法:1.ought to表示应该。
2.表示推测。
注意与must表示推测时的区别:He must be at home by now. (断定他已到家)He ought to be home by now. (不十分肯定)This is where the oil must be. (比较直率)This is where the oil ought to be. (比较含蓄)3.“ought to + have + 过去分词”表示过去应做某事而实际未做。
注意:在美国英语中,ought to用于否定句和疑问句时,to可以省略。
ought和should的区别:1.ought语气略强。
2.should较常用。
3.ought在美国英语中用的很少,而should却相当常用。
4.ought属正式用语。