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祈使句与情态动词

祈使句与情态动词
祈使句与情态动词

祈使句

表示请求或命令别人做某事或不要做某事。

肯定祈使句一定是以动词原形开头(有时有please),否定的祈使句一定是don’t加动词原形开头(有时有please)。

把祈使句改为否定句只需在动词前加don’t即可。

情态动词:

我们现在学过的情态动词有:can, could, will, would, may, must, should, shall。

情态动词后动词总是用原形。(不受其他任何条件影响)

特殊疑问句.

英语语法:祈使句

英语语法:祈使句1含有第二人称主语的祈使句 Be careful!小心! Don't make such a noise.不要这么吵。 1.肯定的祈使句 a.句型:动词原形~.(省略主语) Stand up.起立。 Be quiet,please.请安静。 b.有时,为了增强语气,能够在动词之前加do Do sit down. 务必请坐。 Do study hard. 一定要努力学习。 比较 祈使句和陈述句 陈述句: You sit down. 你坐下来。 祈使句: Sit down.坐下

(省略主语you) c.用客气的语气表示祈使句时,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一个逗号“,”。 Go this way,please. 请这边走。 d.祈使句中如果有唤语,一定要用逗号“,”隔开,放在句首或句尾。 Li Ming,come here. 李明,过来。 Come here,Li Ming. 过来,李明。 2.否定的祈使句 句型:Don't +动词原形~ Don't swim in the river. 别在河里游泳。 Don't be late.别迟到。 Please don't be noisy. 请不要大声喧哗。 注意 表示禁止时,尤其是标语等也可用“No+动名词”来表示。 No smoking. 禁止吸烟。

No parking. 禁止停车。 句型转换 祈使句与陈述句的改写 1.祈使句=You must …(陈述句) Come here .过来。 =You must come here . 你必须过来。 Don't do that again. 你一定不能够再那样做了。 2.Please +祈使句=Will you (please) ~?(陈述句)Please help me .请帮帮我。 =Will you (please) help me? 你愿意帮我的忙吗? Come here on time ,please .请准时到这儿。 =Will you (please) come here on time ? 请你准时到好吗? 2含有第一、第三人称主语的祈使句 Let's say good-by here. 我们在此道别吧。 Don't let him do that again.

英语语法-助动词和情态动词用法及习题

目录 1助动词和情态动词的定义 (2) 2 can,may,must (3) 3 Will you~?和Shall I(we)~? (10) 4 would和should (14) 5 have to (16) 练习题 (17) 答案 (18)

1助动词和情态动词的定义 在英语中,助动词一般没有词义,主要帮助构成谓语,表示时态、语态或构成疑问及否定形式。对于助动词,同学们一般了解即可。 情态动词与助动词不同,它有词义,但它也和助动词一样,不能单独作谓语,它必须和其他动词一起构成谓语,另外重要的一点是情态动词没有人称和数的变化;情态动词后必须跟动词原形。 (×)She cans swim well. (×)She can swims well. (○)She can swim well. (○)She swims well. 即使主语是第三人称单数(例如she)can也不能加“s”。 句子中有情态动词can时,即使主语是第三人称单数,也不能在一般动词(例如swim)上加“s”。 1 助动词的种类 1.be(am,are,is,was,were,been,being) 它与现在分词结合,可以构成进行时态(参见第九章),与过去分词结合可以构成被动语态(参见第十三章)。 I am reading the book.我正在读这本书。 The book was written by me. 这本书是我写的。 2. have(has,had,having) 它与过去分词结合,构成完成时态(参见第十一章)。 I have finished my homework. 我已经写完作业了。 3.shall(should),will(would)

助动词和情态动词

助动词和情态动词 1. ---Good morning. I've got an appointment with Miss Smith in the Personnel Department. ---Ah, good morning. You______ be Mrs. Peters. (10北京) A. might B. must C. would D. can 2. I have told you the truth. ______ I keep repeating it? (10江西) A. Must B Can C May D Will 3. Jack described his father, who _______a brave boy many years ago, as a strong–willed man (10安徽) A. would be B. would have been C. must be D. must have been 4. I_______ have watched that movie —it’ll give me horrible dreams. (10山东) A. shouldn’t B. needn’t C. couldn’t D. mustn’t 5. Doctors say that exercise is important for health, but it _______ be regular exercise. (10辽宁) A.can B.will C.must D.may 6.Wine ____ do good to people’s health if drunk properly. A. can B. should C. must D. might 7. But for the help of my English teacher, I ____ the first prize in the English Writing Competition. A. would not win B. would not have won C. would win D. would have won 8. My sister met him at the Grand Theatre yesterday afternoon, so he _____ your lecture. A. couldn’t have attended B. needn’t attend C. mustn’t have attended D. can’t attend 9. ---Has Mr. Tom White arrived? ---Yes, already. ____ he wait outside or just come in? A. Shall B. May C. Could D. Must 10. Walking in space ____ sound easy, yet great care and skills are needed. A. should B. shall C. may D. must 11. ---Amazing! You ____ wear slippers at work! ----Don’t you know it’s a fashion? A. must B. should C. can D. may 12. ---The two astronauts had been trained for long before they flew to space. ---Oh, they ____ quite a lot of difficulties. A. might go through B. may go through C. should have gone through D. must have gone through 13. ---Can I pay the bill by check? ---Sorry, sir. But it is the management rule of our hotel that payment ____ be paid in cash. A. will B. can C. should D. shall 14. ---Catherine looks sad. Did you tell her about the accident? ---Yes, but I ____ her just before her final exams.

初中英语语法大全:祈使句

初中英语语法大全:祈使句 祈使句表示请求、命令、建议等等。谓语动词一律用原形。句子中通常不用主语,句末用惊叹号或者句号,用降调。 1含有第二人称主语的祈使句 Be careful!小心! Don“t make such a noise.不要这么吵。 1.肯定的祈使句 a.句型:动词原形~.(省略主语) Stand up.起立。 Be quiet,please.请安静。 b.有时,为了加强语气,可以在动词之前加do Do sit down. 务必请坐。 Do study hard. 一定要努力学习。 比较 祈使句和陈述句 陈述句: You sit down. 你坐下来。 祈使句:

Sit down.坐下 (省略主语you) c.用客气的语气表示祈使句时,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一个逗号“,”。 Go this way,please. 请这边走。 d.祈使句中如果有唤语,一定要用逗号“,”隔开,放在句首或句尾。 Li Ming,come here. 李明,过来。 Come here,Li Ming. 过来,李明。 2.否定的祈使句 句型:Don“t +动词原形~ Don“t swim in the river. 别在河里游泳。 Don“t be late.别迟到。 Please don“t be noisy. 请不要大声喧哗。 注意 表示禁止时,尤其是标语等也可用“No+动名词”来表示。 No smoking.

禁止吸烟。 No parking. 禁止停车。 句型转换 祈使句与陈述句的改写 1.祈使句=You must…(陈述句) Come here .过来。=You must come here . 你必须过来。 Don“t do that again. 你一定不可以再那样做了。 2.Please +祈使句=Will you (please)~?(陈述句)Please help me .请帮帮我。 =Will you (please) help me? 你愿意帮我的忙吗? Come here on time ,please .请准时到这儿。 =Will you (please) come here on time ? 请你准时到好吗? 2含有第一、第三人称主语的祈使句 Let“s say good-by here. 我们在此道别吧。 Don“t let him do that again.

be动词、助动词、情态动词讲解(基础篇)第一讲

be 动词、助动词、情态动词讲解(基础篇) 1、 用单数,反之用复数。 ◆ 句中含有be动词时: 肯定句:主语+be +其他 否定句:主语+be +not +其他 一般疑问句:Be +主语+其他+? 特殊疑问句:疑问词(what / who / when / where)+be +主语+其 他+? I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall. There are two books on the table. ★ be 动词用法歌: 我用am,你用are,is 连接他她它。单数名词用is,复数名词全用are。 变疑问,往前提,句末问号莫丢弃;变否定,更容易,be 后not 莫忘记; 疑问否定任你变,句首大写莫迟疑。 ★ be 动词作谓语,它后面一般跟名词、形容词或介词短语。她个子很高。 她在教室里。她是一个高个子的女孩。 2、助动词的用法。 英语句子按正常语序是“什么人或事物” + “做什么”,即,我们常说的“主语+ 谓语+ 其他” 。 ①主语为I 或复数名词、代词时:肯定句:I / We / They / The students

+动词原形+其他+。 We watch TV every night. 变否定:主语+don't +动词原形+其他+。 We don't watch TV every night. 一般疑问句Do + 主语+ 动词原形+ 其他+ ? Do you watch TV every night? Yes, we do. / No, we don 't. 特殊疑问句:疑问词+ do + 主语+ 动词原形+ 其他+ ? How often do you watch TV? ②主语为单数名词或代词时:肯定句:主语+ 动词第三人称单数形式 + 其他+ 。 He watches TV every night. 否定句:主语+ doesn't+动词原形+其他+。 He doesn't watch TV every night. 一般疑问句:Does + 主语+ 动词原形+ 其他+ ? Does he watch TV every night? Yes, he does. / No, he doesn 't. 特殊疑问句:疑问词+ does + 主语+ 动词原形+ 其他+ ? How often does he watch TV? ★主语为单数或不可数名词,谓语要用单数第三人称,反过来,看见动词用了单数第三人称,可以推知主语是单数或不可数名词。 ( )1. How __ ______ your dad help at home? A. do B. does C. is ( )2. ______ goes bad easily in summer. A. Milk B Apples C. Cakes ③过去时的句式(当句子时态为过去时时,动词用过去式,不受主语单复数的影响) 肯定句:主语+ 过去式+ 其他+ 。 He / We got up early every morning last year. 否定句:主语+ didn't + 动词原形+ 其他+ 。 He / We didn't get up early every morning last year. 一般疑问句:Did + 主语+ 动词原形+ 其他+ ? Did he / you get up early every morning last year? Yes, he

初中英语知识点总结:感叹句和祈使句

知识点总结 一、感叹句 感叹句是用来表达喜、怒、哀、乐等强烈感情的一种句式。尽管感叹句的表现形式多种多样,但主要的表现形式只有两种,即what和how引导的感叹句。what修饰名词,how 修饰形容词、副词或动词。 1、由感叹词what引导的感叹句。what修饰名词或名词短语,有以下两种形式: 1)What+a(an)+(形容词)+单数可数名词+主语+谓语!或是:What+名词词组+主语+谓语!如:What a fine day it is! 2)What+(形容词)+可数名词复数或不可数名词+主语+谓语!如:What kind women they are! What nice music it is! 2、由How引导的感叹句。how用来修饰形容词、副词或动词。其结构是:How+形容词(副词)+主语+谓语!例如: How hard the workers are working! How clever the girl is! 注意:当how修饰动词时,动词不跟着感叹词提到主语之前。How fast the runner runs! 3、what与how引导的感叹句,一般情况下可以相互转换,转换后意义不变。(具体见下)如:What an interesting story it is!==How interesting the story is! what a beautiful building it is!==How beautiful the building is! 在口语中,感叹句的主语和谓语常常省略。如:What a nice present!(省略it is)How disappointed!(省略she is或其它可作本句主、谓的词语) 二、祈使句 用于表达命令、请求、劝告、警告、禁止等的句子叫做祈使句,祈使句通常省略主语,谓语动词用原形,句尾用感叹号或句号。 1、肯定结构: 1)动词原形(+宾语)+其它成分。如:Please have a seat here. 请这边坐。有的祈使句在意思明确的情况下,动词可省略。如:This way, please. = Go this way, please. 请这边走。 2)Be + 表语(名词或形容词)+其它成分。如:Be a good boy! 要做一个好孩子! 3)Let + 宾语+ 动词原形+ 其它成分。如:Let me help you. 让我来帮你。 2、否定结构: 1)don't+动词原形+其他。如:Don't forget me! 不要忘记我! Don't be late for school! 上学不要迟到! 2)Let + 宾语+ not + 动词原形+ 其它成分。如: Let him not go. 别让他走。 3)有些可用no开头,用来表示禁止性的祈使句。如:No smoking! 禁止吸烟! 常见考法 对于感叹句和祈使句的考查,常会出现在单选和完成句子中,主要考察两种句子的用法和构成。 典型例题:You should not talk in class.(改写同义句) in class. 解析:本题考查祈使句的用法。从题意“你不应该在课堂上说话”可知,这是建议对方不要做某事的,应该用祈使句。

英语助动词和情态动词及练习

英语助动词和情态动词及练习 一、概述 不同的时态(一般式、进形式、完成式、将来式),不同的语态(主动、被动),不同的语气(祈使、陈述、虚拟),不同的结构(肯定、否定、疑问),以及说话者本身的态度或命令、请求、愿望、可能等,所有这些都要借助于助动词和情态动词表达出来。助动词一般没有词意,不能单独作谓语动词,除非省略句中。他们只参加时态、语态、语气或否定、疑问结构。情态动词有词义,可以用来表示说话者的语气和态度。主要的助动词和情态动词如下表: 二、助动词 助动词一般没有词意,不能单独作谓语动词。其作用在于帮助构成各种时态、语态、否定、疑问等。 1、助动词be(am, is, are, was, were, being, been)的用法 (1) be后跟现在分词构成进行时态。 Who is playing the violin?谁在拉小提琴? She was reading a book then.那时她正在读书。 (2)be后跟过去分词构成被动语态。 He was asked to do the work.有人要他干这件工作。 You are invited to attend the meetintg.有人邀请你参加会议。 (3)be 后跟不定式作谓语,有如下几种情况: ①表示计划、安排将要发生的事。 Who are we to meet?我们要见谁呀? I'm to have supper with John this afternoon.今天下午我要与约翰一起吃晚饭。 ②表示指示、命令,否定式表禁止。 You are to see the headmaster today.今天你必须去见校长。 You are not to enter the room without permission.未经允许你不能进入房间。 ③表示义务、责任等,同should。 You are to be back before 5.你得在5点钟以前回来。 What is to be done?该干什么。 ④表示可能性,与情态动词may, can同义。 Such books are to be found in any library.这种书任何图书馆都有。 Not a sound was to be heard.一点声响也没有。 ⑤表示后来发生的事,可以用来表示命运或注定 They say good-bye, little knowing that they were never to meet again.他们告别了,没想到再也不能相见了。 He was to regret the decision.他有一天会后悔做出这一决定的。 ⑥用于习语 Where am I to go? 我该向何处去? What am I to do? 我该怎么办? 2、助动词have(has, had, having)的用法 (1)助动词have可以构成完成时或完成进行时

初中英语语法知识—祈使句的知识点总复习有答案(1)

一、选择题 1.Hey, James,__________on the wall. A.doesn't draw B.didn't draw C.don't draw D.drew 2.late for class again, Ann. A.Don’t be B.Can’t C.Don’t D.Be 3.good care of yourself when you are alone, or your parents will worry about you. A.Taking B.To take C.Taken D.Take 4.______ talk in the library. A.Don’t B.Not C.Not to 5.Please _____ look outside. Look at the black board. A.not B.don’t C.aren’t D.can’t 6.Peter, ______ more if you want to get high scores in the P.E. test next month. A.practice B.practices C.practicing D.will practice 7.—Hurry up, you will miss the first train of Beijing S2! —OK. I can't wait to see the Great Wall. A.or B.so C.and D.But 8.Be quick, ______ you will be late for the school art festival . A.and B.or C.but D.so 9.___________really hard, and you can realize your dream of becoming an astronaut. A.Works B.To work C.Working D.Work 10.—______________. —G-R-E-E-N, green. A.What's this? B.What color is it? C.Spell it, please. 11.________ the steps, and you can find it convenient to buy things with the mobile phone. A.Follow B.To follow C.Following 12.Don’t _____your children_____other children . A.comparing; to B.compare;with C.compare;to D.comparing;with 13.-Let's make fruit salad. - _____________ . A.No,I'm not B.Thank you C.That's all right D.That's a good idea 14.—Could you take me to the cinema? I want to see the movie named Pacific Rim (《环太平洋》). —______ your homework first, and then we’ll talk about it. A.Finish B.Finished

be动词-情态动词及助动词用法

七年级英语双休日作业 班级:姓名:等级 英语句型变化总结练习 1、含有be动词am,is,are构成的句子: 变一般疑问句时把am,is,are提到句子的前面,句尾用问号即可。 变否定句时直接在am,is,are后面加not即可。例如: 肯定句:He is a student. 一般疑问句: a student? 否定句: He a student. 肯定句:We are from China. 一般疑问句: from China? 否定句:We from China 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can, may,提到句子的前面,句尾用问号即可. 变否定句时直接在can, may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句:she swim? 否定句: She swim. 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 变否定句时在主语后面加don’t / doesn’t , 谓语用动词原形。例如: 肯定句: They play football after school. 一般疑问句: play football after school? 否定句: They football after school. 肯定句:Tom watches TV every day. 一般疑问句: Tom TV every day? 否定句: Tom TV every day.

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