陕西省西安交大阳光中学高中英语 Unit 2 Healthy Eating Grammar导学案（教师版）新人教版必修3

陕西省西安交大阳光中学高中英语 Unit 2 Healthy Eating Grammar 导学案（教师版）新人教版必修 3第 课时课题名称时间第 周 星期课型Grammar主备课人 目标1. Knowledge aims: Learn and grasp the usages of Modal Verb II 2. Ability aims: Use Modal Verb II correctly and proper ly.重点Make clear about the Modal verbs: ought/ ought not to ; should / should not; mustn’t ; (don’t) have to ;二次备课难点Master the usage of the Modal verbs自主学习在课文中找出含有情态动词的句子1 2 3 4 5 问题生成记录： 精讲互动 1.ought to／should1) should 和 ought to 都为“______”，用于各种人称。ought to 的语气稍重一些。 You ought to (should) follow your teacher’s advice.2) 表示主语的义务或责任：You should take care of your sister.4) should 和 ought to 后面跟动词不定式的完成式, You should/ought to have made the decision a week ago.I shouldn't have made such a foolish mistake. 2. must / have to1).must 的用法 表示_____义务和必要, 主要用于肯定句和疑问句, 意思为 “必须，得，；由 must 引起的疑问句，肯定回答要用____________________, 否定回答要用_________或_________________, 意思是“不必” ； must的否定形式 mustn’t 表示禁止，意思是“_______________”。如： —Must I finish the task right now? —Yes, you must. / Yes, you have to. (—No, you needn’t. / No, you don’t have to. 不, 不必。) 2) have to 的用法 A. have to 表示一种_________________需要，意思是“不得不”。 如： B. have to 的否定形式是 don’t have to, 相当于________________。如： They don’t have to buy a computer at present. 3. need / dare（观察句子，总结规律）（1）作为情态动词，need 常用于 句和 句。1e.g. You needn’t buy the dictionary, for we have one lying on the desk. Need he do his homework first?(2) 作为实意动词，need 通常用法是 【注意答语】 -----Need you go now? -----Yes, I ./ No, I .（3）dare 用作情态动词，后跟动词原形，主...