人教版必修三Unit 2 Healthy eating Grammar学案.doc

unit 2 healthy eating grammar学案课程总目标掌握情态动词用法can, could, may, might, will, would, shall, should, must, cant学习ought to的用法by now his restaurant ought to be full of peopleperhaps we ought to combine our ideas and provide a balanced menu掌握语法填空词性变化根据规则完成语篇中的情态动词变化形式step 1 pre-lesson practice.a. listeningdan robinson has been worried all week. last tuesday he received a letter from the local police. in the letter he was asked to call at the1._. dan wondered why he was wanted by the police, but he went to the station yesterday and now he is not worried anymore. at the station, he was told by a 2._policeman that his bicycle had been found. 3._days ago, the policeman told him, the bicycle was picked up in a small village four hundred miles away. it is now being4._ to his home by train. dan was 5._surprised when he heard the news. he was amused too, because he never expected the bicycle to be found. it was stolen twenty years ago when dan was a boy of fifteen! b.readingdo you really need to lose weight?7 questions that can help you decide.so your favorite jeans have gotten a bit too close-fitting for comfort. maybe you dont cut quite the figure in your bathing suit that you did a few years ago.but do you really need to lose weight? are you putting your health in danger - or just carrying around a little harmless extra padding?the standard answer is that youre overweight if your body mass index (bmi) is 25 or higher and obese if your bmi is 30 or higher. 1. what is your lifestyle? regular physical activity and healthy eating are important, no matter what your weight or your bmi. 2. what is your family history? if a close relative has a history of high blood pressure, heart disease, diabetes, or other weight-related ailment, its crucial to be mindful of your weight. 3. what is your weight history? people who have consistently gained weight over the years need be careful. experts say your bmi should not increase dramatically, even as you age. even moderate weight gain in adulthood can increase your risk of diabetes. 4. how is your weight distributed? weight gained above the hips - the so-called apple shape - can be problematic. in both men and women, bigger abdomens can signal trouble. 5. what is your waist size? the national institutes of health has determined that a waist circumference of over 40 inches in men and over 35 inches in women signifies a health risk, particularly in people with bmis of 25-34.9 (the overweight category). clothing size is not a good indicator of weight or health, since sizes vary with different manufacturers. but you can use your own clothing - maybe a favorite pair of pants - as a personal gauge of your weight. 6. what is your health profile? if your cholesterol and blood pressure levels are high and your bmi falls into the overweight or obese category, its important to lose weight. if your bmi is in the high end of healthy or in the low overweight range, its a good idea to talk to your doctor about whether weight loss is right for you. 7. how do you feel? seriously consider weight loss if you are overweight and have joint problems, shortness of breath, or other health troubles that limit your day-to-day living. 你不认识的生词有：_ _ _ _ _ _ _ _step2语法归纳（一） can 表现在的能力或一般的能力could过去一般的能力be able to 将来或过去某种具体的能力 may表允许(正式)、祝愿 can表请求或允许(非正式)1._i come in?2. -could you lend me a hand?-yes, i _3.-might i come here again?-yes, you _4.i will _(能够)go to college.5. he _(能) rush out from fire.6._(祝)you luck!_(祝) you go to college!(三)注意情态动词的回答1.- must i go now? - no, you _ = you dont have to 2.-may i go now? -no, you _ =you had better not. 3. -need i go now? -.no, you _-yes, you_4. would you like to ? yes, i_5. would (will)you please ? yes, i would would you come .? yes, i will 6.would you mind ? yes, i _ no, _= no, please/ go ahead.（五） 征求意见 shall i (we)? he (they).? will you ?_he wait for you? yes, he _they come here,too? yes, they_you go home at once? yes, i _i help you cross the road?shall 许诺, 命令if he gets good marks, he shall get a nice gift.you shall cook at once, or i will beat youwill 总是fish _(shall, will)die without waterman _(shall, will)die would (过去与现在的习惯一样) = used to (过去与现在的习惯不一样)(二) 推测 肯（推测）may(might) be / being doing/have donemust be / be doing /have done否，疑（推测）cant(could)be/ be doing/ have donewhere _（可能） he be?he_(一定不是) headmaster.it _（一定没下雨） last night.he _（一定没去广州）,for i saw him just now.he _(一定正在看)the newspaperhe _(一定去了)to canada yesterdayhe _(也许睡了), for it was too late (四) 情 态 动 词用作推测本能 could have done 本可以 might have done 本该 should have done = ought to have done 本不必要 neednt have done 本希望 had hoped 本想 had thought 本愿意 would like to have done但: cant have done 表“过去曾经一定没有”（推测） must have done 表“过去曾经一定”（推测）you are late, you _(本该来) earlier.youre too lazy, you _(本能回答) it.therere much time left, you _(本不必要着急)i_(本该完成) my work last night, but i saw a film.you_(本可以帮助) him, even if you were busy.i_(本希望) i would come, but i was too busy.he was here just now, he_(一定没去) beijing.(此项语法项目是近几年的高考热门题)情 态 动 词用作虚拟语气过去 （本） could have done should have done might have done neednt have done ought have done但: cant have done 曾经一定没干过would rather (not )do.had better(not)do .you would rather not dancehe had better have more sportsstep3 self-checkcomplete the following sentences using modal verbs. (每小题2分)1. you _ hand it in at once, you may hand it in tomorrow.2. -that must be a mistake. -no it _ be a mistake.3. i didnt see her in the meeting room this morning. she _ have spoken at the meeting. 4. one _be punished for what one hasnt done. 5. with so much work on hand, you _ have gone to see the game last night. 6. most of the students felt rather disappointed at the english party. they say that it _ have been better organized. 7. the little girl _ go there alone. 8. -must we do it now? -no, you _.9. put on more clothes. you _ be feeling cold with only a shirt on. 10. i _ play football than baseball. 11. the plant is dead. i _ have given it more water. 12. lets clean our classroom, _? 13. let us play basketball, _? 14. johns score on the test is the highest in the class; he_ have studied hard last night. 15. she _ have studied for yesterdays test, but she didnt. 16. you _ read that article if you dont want to.17. -isnt that anns husband over there?-no, it_ be him. im sure he doesnt wear glasses.18. -write to me when you get home. - i_19. the fire spread through the hotel very quickly but everyone _ _ _get out.20. the road is wet. it _ _ _(rain) last night.step 4 self-assessment对情态动词掌握如何a. good b. just s