必修3unit1情态动词Grammar分解.ppt

e.g. I don’t like this TV set. We must buy a new one. There was no more bus. They had to walk home. 2. 表示“必须”这个意思时，must和 have?to稍有区别。must着重说明主观 看法，have?to强调客观需要。另外， have?to能用于更多时态。 e.g. You?must?be?the?new?teacher. ? He?must?be?joking. There?is?nobody?here.?They? must?have?all gone?home. 3. must表示对某人某事的猜测, 作“准 是”, “一定” , 一般用于肯定句中。对过 去发生的事情作肯定判断用must have done。 e.g. He must come and worry her with question, just when she was busy cooking the dinner. Of course, after I gave her my advice, she must go and do the opposite. 4. must表示“偏要, 硬要”, 指做令人不 快的事情。 * * 人教课标 高一 必修 3 Unit 1 Modal verbs such as may, might, will, would, can, could, shall, should, and must are used for many purposes. Find the sentences in the reading passage that use modal verbs. 1 Most ancient festivals would celebrate the end of cold weather… 2 Sometimes celebrations would be held after hunters had caught animals. 3 At that time people would starve if food was difficult to find 4 …or to satisfy the ancestor, who might return either to help or to do harm. 5 For the Japanese festival Obon, people should go to clean graves… 6 …this will lead the ancestor back to earth. 7 It is now a children’s festival, when they can dress up and go… 8 …the children might play a trick on them. 9 Festivals can also be held to honour famous people. 10 Harvest and Thanksgiving festivals can be very happy events. 11 In European countries, people will usually decorate … and will get together… 12 Some people might win awards for their… 13 At the Spring Festival in China, people… may give children lucky money in red paper. 14 These carnivals might include parades, dancing in the streets… 情态动词的语法特征 1) 情态动词不能单独做谓语, 除ought和have 外, 后面只能接不带to的不定式。 2) 情态动词没有人称, 数的变化, 但有些情态 动词, 如can, will也有一般式和过去式的变 化。 3)?情态动词的“时态”形式并不是时间区别的 主要标志, 不少情