1、,can/could 表许可 只用can表能力 could 指过去的能力与be able to 的区别 （ 主语） 固定句式 cant but do - 只好做某事- 不得不做某事- cant wait to do - 迫不及待做某事- can not/ never too 再也不为过/ 越越好,can 和 could 可以表示某人或某物一时的特点，可以翻译为“有可能，有时会”。 It can be very warm in this area. 这个地区有时可能非常暖和. He can be very friendly at times. 他有时会非常友好。,cannot cant 与too
2、overenough 等词连用，意思是“越越好” “再也不为过”You cant praise him too much.你无论怎样称赞他都不过分。You cannot be over careful .你越细心越好。 This point cannot be overemphasized. 这一点无论如何强调都不过分。注释： 1 cant cannot too enough 等中的not ，也可以用never hardly scarcely 等代替。We can hardly/scarcely pay too high a price for liberation.为了解放，我们无论付出多高
3、的代价也不为过。,1) A left luggage office is a place where bags _ be left for a short time , especially at a railway station. A. should B. can 2) He didnt agree with me at first but I _ persuade him. A. was able to B. could 3) If it were not for the fact that she _sing, I would invite he to the party. A. ca
4、nt B. couldnt 4)You _ be tired- youve only been working for an hour. A. cant B. may not 5) Oh! How terrible! The weather is generally warm here, but it _ very cold sometimes. A. can be B. will be 6) Mary _ my letter, otherwise she would have replied before now. A. couldnt have received B. ought to h
5、ave received,7) I didnt see her in the meeting room this morning. She _ at the meeting. A. mustnt have spoken B. shouldnt have spoken C. couldnt have spoken,.,may / might 用法 表请求和许可 May/ might I come in? - Yes, you _.- No, you _. 2.表示祝愿 May you succeed! We wish you health, happiness, and prosperity !
6、 4. 固定用法： may/ might well 很可能 may / might as well 不妨做某事,may,mustnt,2) Lisa _ well not want to go on the trip- she hates travelling. A. can B. will C. may 3) We _ have proved great adventurers, but we have done the greatest march ever made in the past ten years. A. neednt B. may not 4)- Where is my d
7、ictionary? I remember I put it here yesterday? - you _ it in the wrong place. must B. might put C. might have put,must 的用法 2.表示 非得， 偏要-,1)Some aspects of a pilots job _ be boring, and pilots often _ work at inconvenient hours. A. can , have to B. may , can C. have to , may D. ought to , must 2)You _
8、 take you umbrella. I am sure it wont rain. A. shouldnt B. cant C. dont have to 3) I have told you the truth. _ I keep repeating it?A. Must B. may C. can 4)- could I have a word with you, mum?- Oh dear, if you _. A. can B. must C. will 5)You _ park here! It is an emergency exit. A. couldnt B. mustnt
9、 6) As he had heart attack, he was told that he _ continue the work. A. mustnt B .cant,7). Jack described his father, who _ a brave boy many years ago, as a strong willed man. A. would have been B. must be C. must have been,will / would 用法表示意愿 、 也表习惯性和倾向性 ，表功能（不能/行、不肯、不乐意）She will sit hours reading
10、.If he will apologize to me , I will forgive him. The door wont lock. Man will die without water.,shall 用法 1.用于法律条文或正式文书， 表示具有法律效力 2. 用于一三人称疑问句 表示_. 3. 用于二三人称陈述句， 表示_. 1)- Whats the name?- Khulaifi. _ I spell it for you? A. shall B. can 2) If you listen to me, you _ have some candies, dear. A. shall
11、 B. will 3)- I havent got the reference book yet, but Ill have a test on the subject next month.- Dont worry. You _ have it by Friday. Could B. shall C. must 4)Persons under 18 _ not be employed in night work in USA.5)It is the management rules of our hotel that payment _ be made in cash.,shall,shal
12、l,征询意见或提出建议,允诺， 命令， 警告等语气,should （有责任义务）应该干- 按道理应该- 3.用于虚拟语气,建议要求命令 坚持,It is necessary / important that -,If 条件句中表示和将来相反 “ 万一”,1） You _ to attend the meeting, but you didnt.A. should come B .should have done 2）-you ought to have come to see Alice yesterday.- yes, I know I _.A. ought to B. ought to h
13、ave C. ought to have come D. should 3）_ fired, your health care and other benefits will not be immediately cut off. A. would you be B. should you be C. could you be 4）This printer is of good quality. If it _ break down within the first year, we would repair it at our expense. A. would B. should C. c
14、ould D. might 5）We are happy that our predictions _ so accurate , which is far from expectation. A. might be B. would be C. should be,Need2.What he needs is a great deal of time.3. The knife needs sharpening/ to be sharpened.,1) - It _ be Mary in the office. - I am sure it _ be her. I saw her off at
15、 the bus station just ten minutes ago. 3) Talking to people online may seem like no big deal, but it _be very dangerous. 4) - I wonder why Sara looks worried today. - I am not sure, but she _ a small accident driving here. (have),must,cant,can,might have had,What a pity! I _ in Hainan two more days,
16、 but something urgent needed to be dealt with back home.2) - my cats really fat. - You _ have given her so much food.3) I _ have been more than six years old whenthe accident happened. (not) 4) The cake is very sweet. You _ a lot of sugar in it. 5) What a pity! Considering his ability and experience, he _better. 7) I got up early, but I _ so because I had no work to do that morning.,could have stayed,shouldnt,could /can not,must have put,could have done,neednt have done,
