2019-2020年高中英语 Unit 2 Healthy Eating Grammar导学案新人教版必修3

2019-2020年高中英语 Unit 2 Healthy Eating Grammar导学案新人教版必修3学习目标:掌握情态动词的基本含义和用法。学习过程语法知识—预习探究一 我的观察下文是学校的一

2019-2020年高中英语 Unit 2Healthy Eating Grammar导学案新 人教版必修3 学习目标: 掌握情态动词的基本含义和用法。 学习过程 语法知识—预习探究 一我的观察 下文是学校的一些规定,你能搞清楚,哪些事可以做,哪些事不能做吗? mustn’t have to Students leave the campus at school hours, so we have don’t have to lunch at school. However, we bring your lunch-boxes because we ought to have adining hall inside the school. We be tidy and orderly there, needn’t but luckily for us, we wash up after dinner. 二我的发现: 请你写出我们本单元要学习的情态动词的汉语意思。 ought to ought not to have to don’t have to mustn’t needn’t 三我的讲解 1. must和mustn’t 1)must表示“必须”,是一种语气很强的要求。否定式must not(mustn't)表示 “不准”, “禁止”等。在回答带有must的问句时,否定式常用need not(needn't)或don't have to 表 示“不必”,而不用must not (mustn't)。 Must —I be home before eight o'clock? mus needn'tyou don't have to —Yes, yout./No, you./No, . 2)must表推测, ①一般只用于肯定句中,表示“一定”,“必定”。 You must be very tired after such along walk. ②表示对过去事情的推测,用"must+完成时"。 must have left You your umbrella in the theatre. can ③当must表推测之意时,其否定形式常用 not而不用must not。 can’t have left His car is still here. He

腾讯文库2019-2020年高中英语