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