Unit 2 Let's celebrate课件第二课时Using language课件-2022-2023学年高一英语外研版(2019)必修第二册同步教学课件

Unit 2 Let’s celebrate Modals (2) Review the modal verbs form unit1 To learn how to use modal verbs Lead-in 回归第1单元学习的情态动词 can, could must, have be able to dare need Grammar 1 may/might的用法 1. 表示请求或允许，译为“可以”。might语气较委婉 (但并非表示过去)。 I wonder if I might ask you a favor? You may tell him this. 2. 表示推测, 译为“可能”。might比may所表示的可能性更小。 That may/might not be true. 3. may/might well (很可能); may/might as well (不妨，还是...为好); You may well be right. 你很可能是对的。 It’s freezing cold outside. We may as well stay at home. 4. may放在句首，表示祝愿。 May God bless you! Grammar 1 may/might的用法 1. 表示请求或允许，译为“可以”。might语气较委婉 (但并非表示过去)。 I wonder if I might ask you a favor? You may tell him this. 2. 表示推测, 译为“可能”。might比may所表示的可能性更小。 That may/might not be true. 3. may/might well (很可能); may/might as well (不妨，还是...为好); You may well be right. 你很可能是对的。 It’s freezing cold outside. We may as well stay at home. 4. may放在句首，表示祝愿。 May God bless you! Grammar 2 shall, should和ought to的用法 Shall 1. shall用于第一人称时，可表示征求对方意见，译为“要不要...”(通常为疑问句)；或者表示将要发生的事，译为“将要...”(通常为肯定句)。 Shall we begin our class? (表示征求意见) I shall be in Shanghai this time next week. (表示将来动作) 2. shall用于第二、三人称时, 表示命令规定(通常为肯定句)。译为“应该”。 You shall go to school on time. Grammar 2 shall, should和ought to的用法 Should/Ought to 1. 表示义务或责任, 译为为“应该”。 We should/ought to learn from each other. 2. 表示建议或劝告，译为为“可以，应该”。 You should/ought to try your best to better your performance. 3. 表示推断, 译为”应该”, “可能”, “按道理会”。 They should/ought to be there by now. 4. should表示意外或惊讶，译为“竟然”。 It's strange that he should come so late. Grammar 3 情态动词+have done的用法 must have done 表示对已发生情况的推测，通常用于肯定句。 She must have gone home. 她肯定已经回家了。 can have done 表示对已发生情况的推测,主要用于否定句或疑问句。 You can't have forgotten her. 你不可能已经忘记她了。 Where can she have put it? 她到底把它放在哪儿了呢? Grammar 3 情态动词+have done的用法 could have done 表示对过去情况的推测，多用于否定句或疑问句。 He could not have been more tha