第六章　情态动词和虚拟语气 2013创新设计英语高考总相关复习（江苏专用）.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;【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 ________ be here at any moment. A．must B．need C．should D．can 答案　C (2)should表“竟然、万一”。;【例15】 You cant imagine that a well-behaved gentleman ________ be so rude to a lady. A．might B．need C．should D．would 答案　C 【例16】 If you ________ have any difficulty in getting spare parts, ring this number. A．ought to B．should C．will D．would 答案　B;5．need (1)意为“需要”，作情态动词用时，须跟动词原形，无人称、数、时态的变化，一般只用于否定句或疑问句