高中英语必修三学案Unit 2 Healthy eating阅读为主的学案.doc

阅读为主的学案 (课前导学）Step 1 Revision1. Check the homework exercises.2. Ask some students to talk about problems with diet, balanced diet and nutrition.Step 2 Reading and findingGet students to read through Warming Up, Pre-reading, Reading and Comprehending to underline all the new words and useful expressions or collocations in these parts.Collocations: have to, a healthy diet, in different ways, energy-giving food, body-building food, protective food, a balanced diet, sit in his empty restaurant, feel very frustrated, a very strange morning, prepare his menu, by lunchtime, by now, ought to, be full of, be made of, Nothing could be better. , hurry by, follow sb. into. . . , lose weight, be fit, be amazed at, more than, a good meal, get away with, had better, do some research, too much, even though, energy-giving food, feel more hopeful, win. . . back, be onRead them aloud and copy them down in the exercise book after class.（课中学习方案）Step 3 Practice for useful words and expressions1. Turn to Page 12. Go through the exercises in Discovering useful words and expressions with students and make sure they know what to do.2. Give them several minutes to finish the exercises. They first do them individually, then discuss and check them with their partner.3. Check the answers with the whole class and explain the problems they meet where necessary.Step 4 Studying important language points1. Everybody has to eat, but do you eat a healthy diet?每个人都得吃东西, 不过你的饮食健康吗？diet1)n. sort of food that is usually eaten(by a person, community, etc. )（某人、共同生活的人等）通常吃的食物; 日常饮食limited variety or amount of food that a person is allowed to eat限定的食物种类或数量; 限定食谱Too rich a diet is not good for you.吃太多油腻的食物对你身体不好。to be/go/put sb. on a diet节食; 限定某人的食物He began his diet a week ago.他在一星期前开始节食。People who are on a diet mustnt have chocolate.正在节食的人不能吃巧克力。2)vt. & vi. (be allowed to)eat only some foods or a little food, esp. to lose weight节食The doctor has dieted the patient strictly.医生严格规定病人的饮食。No sugar in my coffee, please; Im dieting.请不要给我的咖啡放糖, 我在节食。【辨析】diet & fooddiet指的是日常饮食或限定的食物, 尤指维持健康的定量或定质的食物, 通常为可数名词; food是一般用语, 凡能吃能喝的具有营养的东西都可称为food, 通常为不可数名词, 但涉及食物的种类时可用作可数名词。Fill in the blanks with diet or food.(1)The doctor has ordered me a special _.医生给我安排了特殊的饮食。(2)We must have _ to eat and clothes to wear.我们必须有东西吃, 有衣服穿。(3)The sick man must not go without _, but he must have a _ without sugar.这个病人不吃东西不行, 但不能吃含糖的东西。Suggested answers: (1)diet(2)food(3)food; diet2. What will happen to you if you dont eat a balanced diet?要是你不平衡饮食, 会发生什么呢？balance1)n. instrument used for weighing天平; 秤even distribution; steadiness平衡; 平稳The child couldnt keep his balance on his new bicycle.孩子骑在他的新自行车上不能保持平衡。He lost his balance and fell over.他失去平衡, 跌倒了。The growth of the new political party upset the balance of power.新政党的壮大打破了力量的均势。2)vt. & vi. keep or put sth. in a state of balance保持平衡How long can you balance on one foot?你能单脚站立多久？You have to balance the advantages of living downtown against the disadvantages.你必须权衡住在市中心的利弊。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。3)balanced adj. keeping or showing a balance（通常作定语）保持平衡的; 显示平衡的a balanced diet均衡饮食a balanced state of mind内心的平衡【拓展】in the balance（命运）未定, 在危急中; 不确定Though her life was in the balance, she thought only of the safety of her fellows.尽管她生命危急, 但她一心只想着她伙伴们的安全。off balance不稳on balance总的来说Their suggestion has, on balance, proved practicable.总的说来, 他们的建议已被证明是可行的。3. Wang Peng sat in his empty restaurant feeling very frustrated.王鹏坐在他那空荡荡的餐馆里, 感到很沮丧。feeling very frustrated是现在分词短语, 在句子中作状语, 表示伴随情况。例如:She sat on the chair reading a newspaper.她坐在椅子上, 在读报。Pretending to look frightened, I backed towards the door.我装出害怕的样子, 退到门口。另外, 现在分词短语作状语, 还可表示时间、原因、结果等。例如:Walking in the street, she met her old friend.她走在街上的时候, 遇到一位老朋友。（表时间）Seeing no body at home, she decided to eat outside.她看到家里没人, 决定出去吃。（表原因）The child fell, striking his head against the ground.孩子跌倒了, 头撞在地板上。（表结果）【拓展】frustrating令人沮丧的Its frustrating to have to wait so long.等待这么长时间真让人心烦。4. By now his restaurant ought to be full of people.到了这个时候, 他的餐馆本该宾客盈门的。ought to=should1)to show a moral duty （表示一种道义上的责任）应该; 应当She ought to look after her child better.她应该把孩子照顾得更好。You ought to study hard to get a high mark.你应该刻苦学习, 以取得好的成绩。2)ought to have done 表示本应该, 而却没有You ought to have come yesterday.你本应该昨天来的。You ought not to have stayed with her.你本来不应该和她在一起的。be full of=be filled with充满He was full of curiosity.他的心里充满了好奇。The house on fire was full of heavy smoke and shouting.着火的房子里充满了浓烟和喊叫声。5. He thought of his mutton, beef and bacon cooked in the hottest, finest oil.他想起了他用滚烫的精制油烹制的羊肉（串）、牛排和熏咸肉。cooked in the hottest, finest oil是过去分词短语, 作后置定语, 表被动, 相当于定语从句which were cooked in the hottest, finest oil。例如:The flowers picked by him are very beautiful.他摘的鲜花非常漂亮。6. Nothing could be better.再没有比这些更好（吃）的了。这句话相当于“All his food could be the best. ”。比较级的否定形式, 实际上表示的是最高级的含义。例如:I have never seen a better film.我从没看过更好的电影。Nobody loved money better than he did.没有人比他更爱财。I think nothing is more pleasant than traveling.我想没有什么比旅行更令人愉快的了。7. Suddenly he saw his friend Li Chang hurrying by.突然, 他看到自己的朋友李昌匆匆走过。see, hear, notice, watch, feel等动词后面的宾语补足语可以是不带to的动词不定式, 也可以是现在分词, 但两者的含义不完全相同, 前者着重叙述事实的经过, 后者着重强调偶然察觉到的一个正在进行的动作。例如:I saw him put everything in his bag and go out.我看见他把所有的东西都装进了口袋, 走了出去。I saw him putting something in his bag.我看见他正向口袋里装东西。Complete the sentences with the right forms of the verbs given.1)I watched her _(step)off the sidewalk, _(cross)the road, and _(disappear)into the post office.