人教版高二英语Unit13 情态动词 课件VIP免费

情态动词与虚拟语气情态动词1.will, would 与 shall, should will ( 构成一般将来时 ) 将会 ; 过去式 would There will be an end to slavery. Slaves will have their freedom. would ( 过去反复发生 ) 过去常常 He would sit for hours, deeply thinking. shall （用于一、三人称问句中，征求意见）好 吗；否定形式为 shan‘t Shall we start the meeting now? Shall he come and see you? will 情态动词 意愿 If you will listen to me, I would like to tell you a story. 名词 at will随意 Where there is a will, there is a way. 注： 1.Shall 表示说话者的意图、允诺、警告、命令、决心时，用于二、三人称。 You shall get our answer this afternoon. The enemy shall be wiped. shall 表示义务和规定时，用于第三人称。 The new regulation shall take effect on June 1st.Should ( 表示劝告、建议）应该 You should keep your promise. 2.should 常表示情理上“好不好” ought to 指道义上有责任。Should 表惊讶，愤怒语气It is surprising that he should be so foolish.Should 用在疑问词后面 -where is the dictionary? -How should l know. 2.must can may could might must 必须、定要；否定式 needn‘t( 不必） /mustn’t( 不许 ) Must I start right now?No,you needn’t. Mother is busy now.You mustn’t disturb her. must （表示推测、用于肯定句中）定是 There must be a mistake. You must be joking. must ( 表示一种无可奈何的口气）偏偏 At a time when everyone was in bed,he must turn on his radio. Can ① （表示能力能会；过去式 could I can sing my ABC. ② （表示许可、请求，与 may同） ③ （表示推测，用于否定疑问句中）可能 Who can it be?It may be John.No,it can’t be him. could 语气上比 can 更委婉 Could you give me a hand ？ Could I use your bike? Yes,you can.May ( 表示请求、许可）可以 ；否定为 can‘t( 不可以） /mustn’t ( 不许） M...