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1、 祈使句（Imperative Sentence）可 以表达说话人的意愿、请求、叮嘱、 号召、命令或建议，它的主语you （ 听话人）通常省略，谓语动词用原形 ，句子末尾用感叹号或句号，读时用 降调。1. 祈使句的肯定形式1) be型（系动词原形be表语其它） 2) Be careful! Dont go too high. 3) Be quiet, everyone! 2) do型（行为动词宾语其它）Come in, please!Please open your books! 3) let型（Let宾语动词原形其它）Let me have a look.Let me help you.1)
2、 be型（Dontbe表语） Dont be lazy!Never be late again.2) do型（Dont行为动词原形其它）Dont throw the ball like that.Dont worry. Ill soon be all right. Never do it like that.Dont anybody say a word. 2.祈使句的否定形式3) let型有两种否定形式： 1) Let宾语not动词原形其它。Let him not go there. Lets not waste time.2) Dontlet宾语动词原形其它。 Dont let her g
3、o there. Dont let the water run into the room. 4) No+ v-ing/n. 表示禁止做某事No parking/smoking/admission!3. 祈使句的类型 1). 不带主语的祈使句 Be careful next time! Come and see me whenever it is convenient to you. 2). 带主语的祈使句； 为了加强语气或指明同谁说话，可在动词 前加上主语。加上主语时，由于是面对面 说话并直呼其名，故不论第几人称，动词 均用原形，不考虑主谓一致问题。1.Nobody move！2.Mary
4、come here everybody else stay where you are.3.You put on more clothes. Its cold outside.3). (条件)祈使句+and/ or+ (结果)简单句 此句型为“条件与结果”并存的句式，其中 的祈使句可转化为if条件句。1. Work hard and you will succeed.If you work hard, you will succeed.Working hard, you will succeed.2. Hurry up, or you will miss the last bus.If you
5、 dont hurry up, you will miss the last bus.4).祈使句+附加信息；附加信息常表示发 出祈使动作的原因1.Put on your coat, pleaseits very cold outside. 2.Turn down the TV setthe baby is asleep in the room. 5).祈使句的附加疑问句 Open the door, _? Dont forget, _? Lets go there at once, _? Let us go there, _?will you?/wont you will you shall
6、 we will you6).祈使句的强调形式为了表示强调或加强命令、劝告的语气， 使句子更具有说服力，常在其谓语动词前 加上do。1.Do put the direct object after the verb. 2.Do tell me where to buy the tickets for the concert. 3.Do be careful next time!祈使句历届高考大观: 1. Sorry, Joe. I dont mean toDont call me “Joe”. I am Mr. Parker to you, and _ you forget it! (NMET
7、 2003/24)A. do B. didnt C. did D. dont答案选D。经调查，本题失误者甚多，除 了时态上的原因之外，还有语序上的原因 。在否定结构中，you应放在dont之后 ，来表达对方对自己称呼错误的不满，意 为，“你可不要忘了！”。2. Have another cup of coffee, OK ?_.A. With my pleasureB. You are welcomeC. I can manage itD. Thats very kind of you 3. Alice, you feed the bird today, _?But I fed it yest
8、erday. (NMET 1999)A. do you B. will you C. didnt you D. dont you 4). Write to me when you get home. _. (2001 北京春考)A. Yes , I must B. Yes, I should C. Yes , I will D. Yes , I can 5). _ some of this juice perhaps youll like it. (2002 安徽春季 )A. Trying B. Try C. To try D. Have try 6). _ straight on and y
9、oull see a church. You wont miss it. (2004 湖北)A. Go B. Going C. If you go D. When going 7). There are eight tips in Dr. Rogers lecture on sleep, and one of them is: _ to bed early unless you think it is necessary. （2004重庆）A. doesnt go B. not to go C. not going D. dont go 8). Go and join in the party
10、. _ it to me to do the washing up. （2002 上海春季）A. Get B. Remain C. Leave D. Send 9). Tom , _ yourself. Did you forget the school rules? (2001上海春季)A. behave B. believe C. perform D. conduct 10. English has a large vocabulary, hasnt it?Yes. _ more words and expressions and you will find it easier to re
11、ad and communicate. (2004 上海)A. Know B. Knowing C. To know D. Known 11). Stand over there _ youll be able to see it better. (2004天津) A. or B. while C. but D. and 12). Ive never seen anyone run so fast. _ David go. (2004 浙江)A. just watch B. just to watch C. just watching D. just having watched 13).Do
12、nt forget come to my birthday party tomorrow. _ . (NMET 1994)A. Yes , I wont B. No , I wont C. No , I will D. Yes， I will 14). Be sure to write to us, _? (NMET 1993)A. will you B. arent you C. can you D. mustnt you 15). One more week, _ we will accomplish the task. (1998上海)A. or B. so that C. and D.
13、 if 16). _ blood if you can and many lives will be saved.(2001上海)A. Giving B. Give C. Given D. To give 17). _ this book and tell me what you think of it. (NMET 1990)A. Look through B. Look on C. Look into D. Look up18). _it with me and Ill see what I can do.(NMET1998) A. When left B. Leaving C. If you leave D. Leave 19). _down the radio the babys asleep in the next room. (NMET1993) A. Turning B. Turn C. Turned D. To turn 20). If you want help money or anything, let me know, _ you? (上海2003春)A. dont B. will C. shall D. do
