SectionA2a—2d

Try to Find 情态动词表推测 可能性 must can could may might 一 must 表示可能性最大的肯定推测 意思是 一定 准是 只能用于肯定句 如果要 表示 一定不 应该用 can t 如果询问可能性时 应该用 can e g He must know the answers 他肯定知道答案 He can t know the answers 他肯定不知道答案 Can he know the answer 他知道答案吗 二 can could can 表示推测 可能性 时 一般用于否定句或疑问句 can 在疑问句中意思是 会 可能 e g He can t pick her schoolbag up 他不可能拿了她的书包 could 用于表示某事有可能发生或可能是事实 e g Don t eat it It could go bad 不要吃它 可能坏了 The plane could be put off by the storm 这趟飞机可能会因为暴风雨而推迟 could 可用于表示客气 礼貌 委婉的请求语气 Could you please help me with my homework 你能帮我完成我的家庭作业吗 3 may might may might 表示推测 可能性 时 意思是 可能 也许 might 不表示过 去时态 语气更委婉 可能性更小 may might 表推测时 可用于否定句 但 不用于疑问句 e g He may might not be at home but I m not sure 他可能不在家 不过我也不确 定 四 推测时态 1 must 推测现在 正在 过去发生的动作 e g He must have a car now 现在 他一定有一辆小汽车 He must be finishing his homework at home 正在进行 他一定在家做作业 He must have finished the work 过去 他一定已完成了工作 2 can can can t 后可接进行时 完成时 表示对现在发生的动作或过去发生的动作进 行推测 e g They can t be reading in the library 他们一定不在图书馆读书 He can t have gone to Shanghai because I saw him just now 他不可能去了上海 我刚看见他了 3 may might may might 可以推测现在正在发生的动作或过去发生的动作 还可以推测将来 的情况 e g He may might be sleeping now 现在 他可能正在睡觉 These people may might have seen the film before 过去 这些人以前可能看过这部电影 It may rain There are some clouds 将来 可能会下雨 因为有一些乌云 Exercises Choose the correct answer 1 Excuse me Is this the right way to the Summer Palace Sorry I am not sure It be A might B will C must D can 2 Isn t that Ann s husband over there No it be him I m sure he doesn t wear glasses A can t B must not C won t D may not 3 You be tired you ve only been working for an hour A must not B won t C can t D may not 4 Is John coming by train He should but he not He likes driving his car A must B can C need D may Practice Work on 4a Choose the best way to complete each sentence using the words in brackets 1 让学生们理解句子意思 1 A Where s Jean B I m not sure She is might be must be in the laboratory 2 A Everyone is going to the pool after school B Really It must be can t be could be hot outdoors 3 A That s the phone B Hmm I wonder who it must be could be should be 4 A I wonder if there are Jim s glasses B They can t be might be could be his He doesn t wear glasses