浙江省杭州市塘栖中学高中英语必修三教学课件：Unit2grammar情态动词.ppt

;;;注意对need问句的回答: --Need I finish the work today? --Yes, ________________. No, ________________. No, ________________.;needn’t 对其它情态动词的回答: --Shall I tell John about it? --No, you __________. --Must we do it now? --No, you __________. ;2. 表示否定的情态动词的用法: 部分情态动词的否定式是情态动词中的考点 之一。 ;must have done;表示对过去发生的事情或动作责备或抱怨的语气;You should / ought to have told her the truth earlier. She shouldn’t have left without saying a word.;Good-bye!;need have done /needn’t have done