高一英语Unit2HealthyEating2人教实验版知识精讲1

1、用心 爱心 专心高一英语高一英语 unit 2 healthy eating (2) 人教实验版人教实验版【本讲教育信息本讲教育信息】一. 教学内容： unit 2 healthy eating (2) 1. 语法：情态动词：ought to, have to, should, must 以及 need 的用法情态动词综合练习 2. 构词法二. 教学重难点： 1. 情态动词 ought to 与 should 的用法should 作为情态动词，表示“劝告” 、 “建议” ，常译作“应该” 。如：you should keep your promise.你应该信守诺言。young people

2、should respect old people.年青人应该尊重老年人。ought 无人称和时态的变化，后接带 to 的动词不定式。ought to 可表示“义务” 、 “要求”、或“劝告” ，常译作“应该” 、 “应当”等。此时和 should 差不多，只是语气稍重一些。如：you ought to start at once.你应该立即开始。such things ought not to be done.不应该做这种事情。 （注意 ought to 的否定式的写法）ought to 有时可以表示“非常可能”的意思，常用于第三人称中。如：ought he to go?他有可能去吗？yes

3、, he ought to.是的，很可能。if she is completely well, she ought to be back at school today.如果完全康复的话，她很有可能今天来上学。2. must 和 have toshould 和 ought to 用来表示“劝告” ，而 must 和 have to 则用来表示“强烈的要求” 。上一节已经为大家介绍过 must 和 have to 的区别，这里大家还要体会它们与 should 及ought to 的含义差别。下面来理解以下句子的含义及差别。you must eat a balanced diet to stay

4、healthy.you should eat a balanced diet to stay healthy.you must get up early.you have to eat three meals a day if you want to be able to study hard.you must not eat the same kind of food at every meal.you neednt eat meat every day.情态动词练习题： 1. 用 should, shouldnt, must, mustnt, neednt, have to, dont h

5、ave to 填空1）bills room isnt very interesting. so he _ put some paintings on the wall.用心 爱心 专心2）susan drives every where and never walks. she _ use her car so much.3）weve got plenty of time. we _ hurry.4）we have got little time. we _ hurry.5）you _ play on the street. its dangerous.6）must i do all the

6、exercise today? no, you _.7）_ i finish my homework today? no, you neednt.8）you _ wait here. i will call you later. 2. 构词法英语中有很多词汇是通过构词法形成的。通过了解构词法的内容，可以帮助我们更加容易地理解和记忆词汇。1）构词法的分类及规则：构词法规则例证通过前缀构成另一个词happy（形）高兴unhappy（名）不高兴通过后缀构成另一个词happy（形）高兴happiness（名）高兴派生通过加前后缀构成另一个词happy（形）高兴unhappily（副）不高兴地合成两个词

7、合成一个新的单词home + land = homelandover + weigh = overweight转化同一个词有不同的词性water n. 水 v. 浇水visit n. 参观 v. 参观2）派生词常见的前缀prefixmeaningdis-否定dishonest, dislike, disappear, discourage, disappoint, disagree, discover, in-(il-, im- ,ir-)不，非incapable, inability, invisible, incomplete, incorrect, illegal, impossible

8、, impatient, irregular, non-不，非，无non- fiction, non- smoker, non- stop, re-重复，再return, reunite, remarry, rewrite, reconsider, reuse, recycle, un-不unable, unemployment, unfit, unfair, unknown, unlimited, untie, 例如： 1. soldiers must never disobey. 2. an employer cannot afford to hire incapable workers.

9、 3. the answer is not non-change, but a different kind of change. 4. green road, now renamed millbank. 5. this is a house unfit to live in.常见的后缀suffixmeaning用心 爱心 专心-er (-or)farmer, fighter, thinker, villager, visitor, conductor, actor, -esechinese, japanese, -ianmusician, asian, russian, -istartist

10、, piantist, scientist, communist, socialist, -mentgovernment, movement, development, equipment, entertainment -nessbusiness, illness, darkness, selfishness, 名词-tioninvention, liberation, education, collection, translation, -alphysical, national, political, natural, -anamerican, italian, australian,

11、-blereasonable, comfortable, horrible, -fulhelpful, useful, careful, -ingboring, tiring, interesting, -iveactive, instructive, expensive, 形容词-ycloudy, windy, dirty, -fybeautify, terrify, 动词-izeapologize, organize, realize, 副词-lybadly, perfectly, truly, angrily, 例如： 1. there are so many white- collar

12、 worker in zhongguancun. 2. newton is a famous scientist. 3. there was a gentleness about his face. 4. it is natural for ducks to swim. 5. be careful not to fall. 6. its a very exciting story. 7. i must apologize for calling you so late. 8. the father shouted at the naughty son angrily.前后缀综合 1. ther

13、e was little disagreement over what needed to be done. 2. what they have to tell us may be shocking or unacceptable.【模拟试题模拟试题】一、multiple choices 1. excuse me, will you please tell me the way to the railway station?you _ go and ask that policeman.a. mayb. mustc. shouldd. have to2. the little boy keep

14、s looking at the bread. he _ hungry now.a. need beb. has to bec. should bed. must be3. can you play the computer game? yes, i _.a. canb. mustc. needd. should4. _ you pass me a pen?a. mustb. needc. shouldd. could5. tommy has just had lunch. he _ be hungry now.用心 爱心 专心a. cantb. mustntc. may notd. does

15、nt have to6. _ i have your name, please?a. need b. shouldc. will d. may7. must i do all he exercises today? no, you _.a. mustntb. needntc. couldntd. shouldnt8. you _ play with the fire. its dangerous.a. needntb. mustntc. cantd. may not9. the meeting will begin soon. i _ go now.a. mustb. needc. cantd

16、. should10. to make beijing more beautiful, you _ throw rubbish into rivers.a. needntb. cantc. couldntd. mustnt二、（一）complete these sentences with a suitable verb, using a prefix.(加前缀填空)open lock appear smoker correct1.the children were here a minute ago, but now theyve _.2. its closed for the summer

17、, but it will _in september.3. john was so careless that he left the door_ when he went out for a walk last night.4. we are _because we are middle school students.5. this problem is so difficult that most of us give _ answers.（二）根据句意，用括号中单词的同根词填空。1. to his pleasure, he received an _ (invite) to a di

18、nner party.2. it is a _ (shameful) to do an injury to a person.3. the famous _ (music) will make an appearance soon.4. he made an _ (apologize) to me for his _ (care).5. last year jack visited beijing for the_ (eight) time and his wife for the _ (nine) time.6. does the _ (science) know the weight of

19、 an atom?7. _ (europe) make it a rule to buy _ (christ) presents for their friends.8. which subject do you like better, _ (chemical) or _ (physical)?9. is the foreigner a _ (germany) or an _ (italy)?三、阅读短文，在短文空白处写出粗体词的相应名词。whilst at college, i remember listening to a lecture given by a rather pompou

20、s (1) _who was discussing the values of strong (2)_ in politics. firstly he presented his (3)_ of (4)_ , them continued by arguing that (5)_ by a political leader was a positive attribute as resolute decisions could be made but that the basic (6)_ in society could still be maintained. he felt strong

21、ly that schools did not provide the kind of (7)_ needed for the development of good leadership qualities which should be instilled from early (8)_. he felt also that modern society encouraged qualities such as (9)_ and (10)_ gave no positive (11)_ to the young. however, when an earnest young 用心 爱心 专心student explained that he would like to become a (12)_ or a (13)_ in industry, and asked about courses to follow, the politician s