Unit 5 The Value of Money 第 3 课时 Discovering Useful Structures（教学课件）-2023-2024学年高一英语同步精品课堂（人教版2019必修第三册）

Unit 5 The Value of Money Teaching objectives 1.identify and figure out the meanings and functions of some modal verbs modal verbs(情态动词）. 2.better understand and express feelings and attitudes by analyzing the modal verbs. 3.talk about future events in the past using “would do” and “was / were going to do”. Period 3 Discovering Useful Structures Read the sentences below and think about: What are the functions and meanings of these modal verbs? a polite request May we ask what you’re doing in this country and what your plans are? intention If you’ll excuse me, I ought to be on my way. You can't open it until two o'clock. a permission a polite request Could you offer me work here? Lead-in 常见情态动词、其缩略形式 情态动词 否定缩略形式 can could couldn't may mayn’t might mightn’t shall should shouldn’t ought to oughtn’t to 情态动词 否定缩略形式 had better must mustn’t have to will would wouldn’t dare daren’t need needn’t can't shan't had better not won't How many modal verbs do you know? don’t/doesn’t have to Lead-in 情态动词的定义 情态动词 (Modal verb) 情感 & 态度 1. You needn’t try it if you don’t want to. 2. The man can speak two foreign languages. 3. The poor boy had to face the problem bravely. 情态动词_______独立作谓语，只能和_________一起构成谓语，没有数的变化，具有助动词功能。 不能 动词原形 Explanation 1.只作情态动词的： 2. 可情态可实义的： 3. 可情态可助动词的: 4. 相当于情态动词的: 情态动词的分类 can/could, may/might, ought to, must need, dare/dared shall/should, will/would have to, used to Explanation 情态动词的用法 can & could (1) 表能力，“能，会” She can speak English. She could play the piano at the age of three. be able to能用于各种时态；can/could只能表示现在或过去的能力。was/were able to“设法做成某事”相当于managed to do sth// succeeded in doing sth All the people trapped in the burning house were able to get out of it. (2) 表请求和许可，“可以”，could比can更加委婉，表示礼貌 Can I smoke here? —Could I use your computer? —Yes, you can. (3) can表客观可能性，“有时候会”，用于肯定句 A wise man can sometimes make a mistake. (4) can表推测，用于疑问句、否定句。肯定句用must Can the news be true? He can’t