【正文】 s six o39。may 否定式為 may not, 縮寫形式是 mayn?t。What can I do for you? 你要什么？How dare you treat us like that!你怎么敢那樣對待我們?nèi)?、情態(tài)動詞的特點情態(tài)動詞無人稱和數(shù)的變化，情態(tài)動詞后面跟的動詞需用原形，否定式構(gòu)成是在情態(tài)動詞后面加“not”。t worry about won39。t you e in and have a little whisky ? 你要不要進(jìn)來喝一點兒威士忌？（或是：你進(jìn)來喝一點兒威士忌，好嗎？）Would you tell me how to get to the shopping center ? 您能告訴我怎么去購物中心嗎？ 2）用于表示愿望Go where you 。Why should I pay him for nothing ? 我干嗎要無為地付給他錢？ It seems so unfair that this should happen to 。4）規(guī)定Each petitor shall wear a 。Used to 表示過去的習(xí)慣動作或狀態(tài)，現(xiàn)在不復(fù)發(fā)生或存在，疑問式和否定式有兩種。注意，在美國英語中ought to 用于否定和疑問句時to可以省略。t have to), but you must finish it in three days.(3)在肯定句中must可以表示推測，表示“一定”或“必定”之意，如：Whose new bike can it be?It must be Liu Dong39。如：He was able to go to the party yesterday evening in spite of the heavy 、may和might(might為may的過去式)的基本用法may , might 或許，可能，可以（might可以看作是may的過去式，這兩個詞除了時態(tài)不相同外，在表達(dá)意思的許多方面是相近的。這時候，could就不可以看作是can的過去式了。He could hardly support his family before he found the new 法養(yǎng)家。must。(對事實推測)情態(tài)動詞+ have +過去分詞1)may(might)have + done sth, can(could)have + done sth 表示過去，推測過去時間里可能發(fā)生的事情。The girl in red must have been said she would wear a red blouse and no other girls were in red then.(= There can’t be another possibility.)那個穿紅衣的女子一定是Lucy。注意：could, might表示推測時不表示時態(tài)，其推測的程度不如can, may。I don39。2)must表對現(xiàn)在的狀態(tài)或現(xiàn)在正發(fā)生的事情的推測時，must 后面通常接系動詞be 的原形或行為動詞的進(jìn)行式。根據(jù)要表達(dá)的意思，有如下結(jié)構(gòu)：should have done / ought to have done：本應(yīng)該…… shouldn’t have done / oughtn’t to have done：本不該…… could have done：本來可以…… needn’t have done：本來沒必要…… would like to have done：本來很想…… would rather not have done: 本來不愿意…… could / might / have done: 不然早就情態(tài)動詞講解與訓(xùn)練高考重點要求：1．掌握情態(tài)動詞的基本含義和用法，并能根據(jù)語境準(zhǔn)確使用表達(dá)情感的情態(tài)動詞。m not ________go to the concert ．mustB．wouldC．shouldD．might is on time for _________ it be that he was late for the opening ceremony?A．can B．shouldC．mayD．mustHe hesitated for a moment before kicking the ball, otherwise he ________ a ．had scored B．scoredC．would score D．would have scored20.—Write to me when you get home.—_________A．I mustB．I shouldC．I willD．I can was really anxious about _____ home without a 39。s nearly seven o39。t leave, I’m not feeling well in the stomach, I______so much fried chicken just ’t ’t have eaten’t have ’t eat heard they went skiing in the mountains last _____ be true because there was little snow may not beB won’t beC couldn’t beD mustn’t be has been announced that candidates_____ remain in their seats until all the papers have been canB willC mayD shall leftluggage office is a place where bags ______ be lefe for a short time, especially in arailway don39。39。 to。t be39。t have 39。t39。t I39。ve only been working for an 39。他不是你嘲笑是熱恰恰是你應(yīng)該學(xué)習(xí)的一個人。t。表示對過去正在發(fā)生事情的推測。學(xué)生們肯定在睡覺。如：The temperature on the mountain top can be as low as minus 15 。它很接近中文里的能愿動詞。can , could 能，會（could可以看作是can的過去式，這兩個詞除了時態(tài)不相同外，在表達(dá)意思的許多方面是相同的。Can you tell me how to get to the airport ? 你能告訴我怎么去機(jī)場嗎？Could you tell me how to get to the airport ?您能告訴我怎么去機(jī)場嗎？Could I be forgiven my negligence ? 請原諒我的疏忽，行嗎？4）（用于否定句、疑問句或感嘆句中）表示猜測、懷疑或驚詫How can / could you be here ? 你怎么會在這兒？She couldn39。情態(tài)動詞沒有人稱和數(shù)的變化。t touch the fire.(2)對以must提出的疑問句，如作否定回答時，要用needn39。t意思是“絕不能、一定不要”，而沒有“不必”的意思。Stay at home in case he should e to visit 。2）命令You shall e to my office 。They should do it for their own 。Take an umbrella with you in case it should ，以防萬一下雨。re looking 。t see you in class must have been ，你肯定沒有來。Can you pass me the books? 你能給我遞一下書嗎 ? Could you help me, please? 請問, 你能幫助我嗎? What can you do? 你能干點什么呢? Can you be sure? 你有把握嗎?can 和could 只能用于現(xiàn)在式和過去式兩種時態(tài)，將來時態(tài)用be able to 來表示。Must I return the book tomorrow? 我必須明天還書嗎?After such a long walk, you must be , 你一定累了。 “需要”， I att。You mustn39。t help ，我?guī)筒簧夏?。It must have rained last night for it is so wet ，昨晚肯定下雨了。He would sit there for hours, doing nothing at ，什么都不干。I39。You should write to your parents at least once a 。t be ，她不會太受壓的。你還要告訴其他學(xué)生要帶筆，還有他們不能遲到。t 或是don39。如：May I use this dictionary?Yes, ，如果Might I…? 就比用May I…? 語氣更婉轉(zhuǎn)些，如：May I have a look at your new puter? 但是表示“阻止”或“禁止”對方做某事時，要用must not代替may not，如：May we swim in this lake?No, you mustn’’s too dangerous.(2)may或 might都可以表示可能性，表示“或許”、“可能”之意，如果用might表示可能性，則語氣更加不肯定，如：They may(might)be in the library 、must的基本用法(1)must表示“必須”、“應(yīng)該”之意，其否定式 must not，縮寫形式為 mustn39。You could have done better if you had worked harder at ，本來可以干得更好一些的。Such kind of thing can39。They needn39。t have done sth本沒必要做某事I dressed very warmly for the trip, but I needn39。2)can不能用于肯定句中表示對任何時間的事實進(jìn)行推測(即不能用can do / can have done / can be doing / can have been doing表示對事實進(jìn)行推測)，如不能說She can be “她可能是Lucy。Usually Lucy arrives very early, so she shouldn’t / oughtn’t to be late this time.(= It’s reasonable to assume that she won’t be late this time.)通常Lucy到得很早，所以她這次不應(yīng)該會遲到。The road is must have rained last ，昨天晚上一定下雨了。t hear the must have been ，我想必是睡著了。⑵ 當(dāng)情態(tài)動詞完成式是由ought to / should加完成式或否定式ought not to / shouldn’t加完成式時，是表示對已發(fā)生的情況表示“責(zé)備”、“不滿”，分別表示“本應(yīng)該…”和“本不應(yīng)該…”。 39。t needn39。ve told him 39。t have 39。t6.─There were already five people in the car but they managed to take me as well.─ It______ a fortable 39。must Jack on duty today?It ______ be ’s his turn ’’tCcan’’t’s your tour around the North Lake? Is it beautiful?It ________ be, but it is now heavily crowded places like airports and railway stations, you ________ take care of your what? I have got A for my term !You ________ read widely and put a lot of work into must have looks very ________ have passed the guess ’s not difficult after do you think we can do for our aged parents?You ________ do anything except to be with them and by ’t have ’t ’’t off the TV, your homework now?Mum, just ten more minutes, you be ’t you be doing’t you be you be doing MP4 player isn’t in my ______ I have put it? can’s really ________ have given her so much ’’’’t biggest problem for most plants, which ________ just get up and run away when threatened, is that animals like to eat ’tB can’’’