情态动词和现在完成时语法,高中英语情态动词语法讲解
本内容由小编为大家分享关于招生简章、录取分数、报名考试、志愿填报等教育信息。高考英语语法:情态动词详解 1、情态动词 + have done sth 这个结构有着特殊意义:用来表示猜测(设想可能发生过什么事情)或 想象(设想可能出
本内容由小编为大家分享关于招生简章、录取分数、报名考试、志愿填报等教育信息。
高考英语语法:情态动词详解
1、情态动词 + have done sth 这个结构有着特殊意义:用来表示猜测(设想可能发生过什么事情)或 想象(设想可能出现过什么不同的情况) ①should (ought to) have done sth 本来该做而未做 This wall oughtn’t to have been painted blue. ②need have done sth 本来有必要做而未做 You needn’t have told her the news. ③must have done sth 对过去所做动作的肯定推测 ---We went to Paris. ---That must have been nice. ④can have done sth 对过去所做动作的否定或疑问推测 I don’t think he can have heard you. Call again. Where can John have put the matches? ⑤may (might) have done sth 过去可能发生某事,与could相比,may和 might可能性较小,might 可能性更小;might 也可表示过去可能发生而未发生的事情。 Polly’s very late----she may (might) have missed her etrain. You were stupid to try climbing there. You might have killed youself ⑥could have done sth ●推测过去”可能“发生某事 (同can, 但can不用肯定句) She could have gone off with some friends. ●表示过去没有实现的可能性:某事可能发生,但却没有发生 You were stupid to go skiing there----you could have broken your leg. ●表示有能力做而未做(虚拟语气) You could have helped me ! (You were able to help me, but you didn’t.) 2、can could be able to 表示”能力“ ●can 通常表示现在的或”一般的能力“---即你无论什么时候想做就能 做到的能力, 指单纯的表示一个人有某种能力。 You can certainly cook, even if you can’t do anything else. ●be able to表示某人通过努力、克服困难做成某事。 will be able to 表示将来的能力 I’ll be able to speak German in another few months. ●could 表达 ”一般的能力“---即你过去想干什么就可以干什么 She could sing like an angel when she was a kid. 但could 不能表达过去某种具体的能力,此时用was able to, managed to 或 succeeded in 等 How many eggs were you able to get ? 3、can, could, may和might 表示”可能性“ ●可用来表示:①理论上的可能性(不涉及是否真发生);②提出建议 (提出解决某个问题的可能办法或者采取的行动);③在问句或否定句中表达现在的可能性) Anybody who wants to can become a prison visitor. ①---What shall we do ? ---We can try asking Lucy for help. ② Who can that be at the door ? Can it be Polly? ③ ●may 可用来表达:①将来的可能性;②说话时某事可能是真实的 We may go climbing this summer. ① You may be right. ② ●could / might 可用来表示: ①说话时某事可能是真实的;②将来 某事有可能发生,但不表示特别可能发生。 You could be right, but I don’t think you are. ① It could rain later on this evening. ② 4、can, could, may 和might表示“允许” ①请求允许:它们都可以表示请求允许做某事,could 和 might并不是表示过去 Can (May, Could) I borrow your umbrella ? ②允许:当我们允许某人做某事时,我们用can和may来表达,而不能使用could和might You may / can watch TV for as long as you like. (不用could, might; mustn’t 有“拒绝”的意思) ---Could I use your phone? ---Yes, of course you can /may. (No, you can’t / may not.)高考招生网Www.ZhaoSheng.net提供最新高考成绩查询时间,高考成绩查询入口,高考信息,高考志愿填报指导,高考政策,高考分数线,高考录取人数,高考真题,高考作文,高校招生报名信息。
免责声明:我们致力于保护作者版权,注重分享,被刊用文章因无法核实真实出处,未能及时与作者取得联系,或有版权异议的,请联系管理员,我们会立即处理,本文部分文字与图片资源来自于网络,转载此文是出于传递更多信息之目的,若有来源标注错误或侵犯了您的合法权益,请立即通知我们,情况属实,我们会第一时间予以删除,并同时向您表示歉意,谢谢!
联系电话:135-2467-2021