2012届高考英语总复习 专题五情态动词和虚拟语气 MYKONGLONG
2012届高考英语总复习 专题五 情态动词和虚拟语气
2012届高考英语总复习 、几组情态动词的区别 l·can和 be able to can与 be able to都可以表示能力,但两者在用法上有点差 异:can( could)表示主观能力,不表示意愿; be able to表示 主观意愿,强调要克服困难去做某事。它的将来时用 will be able to例如: My grandma is over seventy but she can still read without lasses He is able to give up his bad habits MYKONGLONG
2012届高考英语总复习 一、几组情态动词的区别 1．can 和 be able to can 与 be able to 都可以表示能力，但两者在用法上有点差 异：can(could) 表示主观能力，不表示意愿；be able to 表示 主观意愿，强调要克服困难去做某事。它的将来时用will be able to。例如： My grandma is over seventy，but she can still read without glasses. He is able to give up his bad habits
2012届高考英语总复习 2·must和 have to must和 have to都可以表示“必须”,但有几点区别: (1)must强调“内在的职责”、“义务”,而 have to强调 “外界压力”、“不得已而为之” (2) have to可用于多种时态,而must一般用于现在时,其过 去时与将来时分别由 had to与sSha/ will have to代替。 MYKONGLONG
2012届高考英语总复习 2．must 和 have to must 和 have to 都可以表示“必须” ，但有几点区别： (1)must 强调“内在的职责” 、 “义务” ，而have to 强调 “外界压力” 、 “不得已而为之” 。 (2)have to 可用于多种时态，而must 一般用于现在时，其过 去时与将来时分别由had to 与 shall/will have to 代替
2012届高考英语总复习 (3)在回答must引起的问题时,如果是否定的答复,不能用 mustn't,而要用 needn't或don' t have to,因为 mustn't是 “一定不要”、“一定不能”、“禁止”的意思。例如 1)You must come to the classroom before eight 2)It is raining hard outside, but i have to leave now 3)"“ Must we do it now?”“No, you needn't.” MYKONGLONG
2012届高考英语总复习 (3)在回答 must 引起的问题时，如果是否定的答复，不能用 mustn't，而要用needn't 或 don't have to，因为 mustn't 是 “一定不要” 、 “一定不能” 、 “禁止”的意思。例如： 1)You must come to the classroom before eight. 2)It is raining hard outside，but I have to leave now. 3)“Must we do it now？”“No，you needn't
2012届高考英语总复习 3· used to+do, be used to+ doing和 be used to+do (1) used to+do意为“过去常常做某事 “过去一直做某 事”; be used to+v.ing/m意为“习惯于”; be used to+do 意为“被用来做某事” (2) used to只表示过去,而 be used to+v.ing/m可表示现在 过去或将来。例如: DHe used to smoke. Now he doesn't. 2)He's quite used to hard work/working hard 3)The knife is used to cut bread. MYKONGLONG
2012届高考英语总复习 3．used to＋do，be used to＋doing 和 be used to＋do (1)used to＋do意为“过去常常做某事” ， “过去一直做某 事” ；be used to＋v. ing/n.意为“习惯于” ；be used to＋do 意为“被用来做某事” 。 (2)used to 只表示过去，而 be used to＋v. ing/n.可表示现在、 过去或将来。例如： 1)He used to smoke.Now he doesn't. 2)He's quite used to hard work/working hard. 3)The knife is used to cut bread
2012届高考英语总复习 4·can't与 mustn't can't表示“不能”,是指无能力; mustn表示“不能”, 指的是“禁止,不允许”°在口语里,can't也可表示“禁 止,不允许”,但语气不如 mustn't强。例如: He is so young that he can 't go to school. There's a meeting inside. You mustn't make any noise. MYKONGLONG
2012届高考英语总复习 4．can't 与 mustn't can't 表示“不能” ，是指无能力；mustn't 表示“不能” ， 指的是“禁止，不允许” 。在口语里，can't 也可表示“禁 止，不允许” ，但语气不如 mustn't 强。例如： He is so young that he can't go to school. There's a meeting inside.You mustn't make any noise
2012届高考英语总复习 5·can和may 考试中主要测试can,may或coud, might,表示可能性的 区别及对may构成的疑问句的回答。 (1)can, could,may, might都可以表示可能性。can, could表示潜在的可能性或理论上或逻辑判断上存在的可能 性;而may, might,则表示事实上的可能性。此外,can, could还有“有能力”的意思,而may与migh不具有此意。 例如: According to the weather forecast it may rain tomorrow. Any man with a little sense can see that he is wrong. MYKONGLONG
2012届高考英语总复习 5．can 和 may 考试中主要测试can，may 或 could，might，表示可能性的 区别及对 may 构成的疑问句的回答。 (1)can，could，may，might 都可以表示可能性。can， could 表示潜在的可能性或理论上或逻辑判断上存在的可能 性；而 may，might，则表示事实上的可能性。此外，can， could 还有“有能力”的意思，而may与 might 不具有此意。 例如： According to the weather forecast，it may rain tomorrow. Any man with a little sense can see that he is wrong
2012届高考英语总复习 (2) May l/we?这一类疑问句的肯定回答为Yes, please.或 Certainl;否定回答为 Please don't或No, you mustn't例 如 May we leave now?”“No, you mustn" t You haven't finished your homework yet. MYKONGLONG
2012届高考英语总复习 (2)May I/we...？这一类疑问句的肯定回答为Yes，please.或 Certainly；否定回答为 Please don't.或 No，you mustn't.例 如： “May we leave now？”“No，you mustn't.You haven't finished your homework yet
2012届高考英语总复习 6·情态动词+动词完成式 情态动词+动词完成式即“情态动词+have+done”,表示 对过去的行为或动作进行推测、评论或判断 (1)must have done must have done表示对过去某事的肯定猜测。其否定或疑问 形式都用can( could)来表示。例如 Since the road is wet it must have rained last night. He can't have missed the way. I drew him a map. MYKONGLONG
2012届高考英语总复习 6．情态动词＋动词完成式 情态动词＋动词完成式即“情态动词＋have＋done”，表示 对过去的行为或动作进行推测、评论或判断。 (1)must have done must have done 表示对过去某事的肯定猜测。其否定或疑问 形式都用 can(could)来表示。例如： Since the road is wet，it must have rained last night. He can't have missed the way.I drew him a map
2012届高考英语总复习 The dictionary has disappeared who could have taken it 当然对现在发生或将来发生的事情,要用 must do表示猜测 否定式为 can't do He must understand that we mean business You must be hungry after a long walk. MYKONGLONG
2012届高考英语总复习 The dictionary has disappeared.Who could have taken it? 当然对现在发生或将来发生的事情，要用 must do 表示猜测， 否定式为 can't do。 He must understand that we mean business. You must be hungry after a long walk