第六章　情态动词和虚拟语气 2013创新设计英语高考总复习（江苏专用）ppt课件.pptVIP

第六章　情态动词和虚拟语气 △情态动词和虚拟语气讲解△ 一、情态动词 (一)情态动词的基本用法 1．can / could (1)表“能力”。 【例1】 Just be patient.You ________ expect the world to change so soon. (2010·全国Ⅰ) A．cant B．neednt C．may not D．whether 答案　A 【例2】 We ________ eat in a restaurant because none of us had any money on us. A．cant B．couldnt C．may not D．might not 答案　B (2)表“许可”。回答could的提问常用can，一般不用could。 【例3】 —Could I use your bike? —Yes, surely you ________. A．might B．will C．can D．could 答案　C (3)could一般只表过去的能力；若表示过去的能力得到了实施，一般用was / were able to，不用could。 【例4】 The fire spread throughout the hotel very quickly but everyone ________ get out. A．had to B．would C．could D．was able to 答案　D 2．may / might (1)表“许可” (＝can)。若表示“不可以、禁止”，用mustnt或cant。回答might的提问常用may，一般不用might。 【例5】 —________ I take the book out? —Im afraid not. (2010·四川) A．Will B．May C．Must D．Need 答案　B 【例6】 —Might I use your pen? —Yes, of course you ________. A．may B．must C．could D．might 答案　A 【例7】 —May I watch TV now? —No, you ________. A．can B．mustnt C．couldnt D．mightnt 答案　B (2)may表“祝愿”，置句首，主谓要倒装。 【例8】 Good luck to you, and ________ all your wishes come true! A．can B．may C．must D．might 答案　B 3．must / have to (1)表“必须”。must强调主观看法；have to强调客观需要。 【例9】 ①This is a bad party—We really ________ go. ②This is a lovely party, but we ________ go because of our baby. A．must B．may C．can D．have to 答案　①A　②D (2)mustnt意为“禁止、不准”；havent to意为“不必”(＝neednt)。 【例10】 You ________ practice the drums while the baby is sleeping. A．havent to B．mightnt C．mustnt D．wont 答案　C (3)must表“偏要、硬要”。 【例11】 Why ________ you always interrupt me? A．can B．will C．may D．must 答案　C 【例12】 —May I smoke here? —If you ________， choose a seat in the smoking section. A．should B．could C．may D．must 答案　D (4)以must开头的一般疑问句，若要作否定回答，常用neednt或havent to，一般不用mustnt。 【例13】 —Must I come at four oclock? —Oh，no.You ________ come at four. A．wont B．neednt C．cant D．mustnt 答案　B 4．ought to / should (1)意为“应该”，表义务或责任，ought to的语气比should稍重。 【例14】 Its nearly seven oclock.Jack ________