1、Module6 Unexplained Mysteries of Natural- Period2新课教学过程一（外研版必修4）Period 2 GrammarMay have/ might haveGoals To learn to use may have/ might haveProceduresStep 1: Learning about ways to talk about possibility and improbabilityMayPossibility We can use may to say that something is a possibilitymay + ver
2、b - Events in presentmay + have + past participle - Events in pastShe may be rich.= It is possible that she is rich.She may have missed her train.= It is possible that she missed her train.MightPossibility Might is used to say that something is possible in the present or the future like mayWhat is d
3、ifference between might and may?Usually may and might have same meaning but might is used when the situation is not real.If you dont hurry up, you might be late.She might be having lunch at Chinese restaurant.To speculate about or consider things that were probably true in the pastmay possibilityJac
4、k may have been upset. I couldnt really tell if he was annoyed or tired. She may have spoken to him yesterday.Jack may not have been upset. Perhaps he was tired. To speculate about things that were probably true in the pastmight possibilityShe might have taken the bus. Im not sure how she got to wor
5、k. I might have left my books on the bus.She might not have taken the bus. She might have walked home. Step 2: Putting “may” and “might” into dialoguesMay DIALOGUEWoman: thanks very much, been very useful. But we still have a lot to talk about. Well need another meeting. What about next week?Boss: M
6、ay I make a suggestion?Woman: Of course.Boss: Could we meet again next month? We may have more information by that time.Woman: Ah. Um. I may be on holiday next month.Boss: I see. Well, next week then.Woman: (CONVERSATION FADES) I think thats best.Might DIALOGUEMary: I cant find my phone.Tom: It migh
7、t be in your briefcase.Mary: No. I always. oh dear. I think I might have left it in the taxi.Tom: Oh Helen. Youd better call them.Mary: Oh great, yes, of course. (CONVERSATION FADES) But I havent got a phone, have I?Step 3: Making sentences with “may/ might have”1. He may have brought good luck to h
8、is wife.2. Its death and destruction might have been caused by global warming.3. They might have talked about monsters among them.4. In Chinese culture, dragons may have been closely connected to the royal family.5. The emperors robes might have had a symbol of a gold dragon with five claws.6. Other
9、 members of the royal family may have worn claws of a different color according to popular belief.7. He might have been born in the year of the dragon.8. My group leader might have had a different reputation.9. He may have told the story of a Scandinavian hero to his teacher.10. The lake monster mig
10、ht have been killed in the fight.Step 4: Absorb information concerning National College Entrance Examination命题热点：为情态动词的基本用法辨析，情态动词表示态度的用法辨析，情态动词表示推测的用法辨析，情态动词在虚拟语气中的运用。考查形式：主要体现在听力理解、单项填空和完形填空中。下面就近几年来高考试题中出现的情态动词的考点进行归纳分析，以便同学们复习掌握。典例精析一、考查情态动词的基本用法一些常见情态动词的非常用意义往往为高考考查的焦点，考生须确切理解其含义并根据句子意思选择正确的情态动
11、词。例1：”The interest _be divided into five parts, according to the agreement made by both sides.” declared the judge. (重庆2004)A. may B. should C. must D. shall例2： The room is so dirty. _ we clean it? Of course. (北京春2003)A. Will B. Shall C. Would D. Do分析：上述两题均考查 shall的非常用含义，当shall用于一、三人称疑问句中时，表示征求对方意见；
12、用于二、三人称陈述句中，表示说话人给对方的命令、警告、允诺或威胁等。上述三题答案分别为D、B。例3：He strange - he _ sit for hours without saying anything.A. shall B. will C. can D. must分析：will用来谈习惯和特性，尤其是不受时限必然发生的情况。本句意思为”他很怪，能一坐几个小时一句话也不说”。答案为B。例4：John, look at the time. _ you play the piano at such a late hour？(全国2005)A. Must B. Can C. May D. N
13、eed例5：Tom, you _leave all your clothes on the floor like this！(全国II 2005)A. wouldnt B. mustnt C. neednt D. may not分析：must用于疑问句，表示责备、抱怨的感情色彩，意思为”偏要，硬要、干嘛”；而mustnt则表示禁止、不允许，是说话人强有力的劝告。故答案分别为A、B。例6：You cant imagine that a well-behaved gentleman _ be so rude to a lady. (上海2001)A. might B. need C. should
14、 D. would分析：在某些名词性从句中，should 表示惊异、意外等情绪，常译为”竟然”。答案为C。如：It seems unfair that this should happen to me. 真不公平，这件事竟然发生在我身上。例7：_it rain tomorrow, the meeting would be put off. A. Should B. Would C. Could D. Must分析：在条件状语从句中，should 表示”万一”，即可表示不能实现的假设，又可表示可以实现的假设。该句意思为”万一明天下雨，会议就延期。”答案为A。例8：A left-luggage o
15、ffice is a place where bags _ be left for a short time, especially at a railway station. (全国2003)A. should B. can C. must D. will例9：The World Wide Web is sometimes jokingly called the World Wide Wait because it _be very slow. (浙江2005)A. should B. must C. will D. can分析：can 表示推测时常用于疑问和否定句中，用于肯定句中常常表示理
16、论上的可能性，用来表达事件或情况可能发生(但并不牵涉到是否真的会发生)。故答案分别为B、D。1. We _ have proved great adventures, but we have done the greatest march ever made in the past ten years. (2006天津) A. neednt B. may not C. shouldnt D. mustnt2. Yesterday, Jane walked away from the discussion. Otherwise, she something she would regret later. (1996上海)A. had said B. said C. might say D. might have said答案：BD
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