助动词的用法总结及讲解一助动词：情态助动词，基础助动词助动词的定义：助动词和情态动词都是英语中特殊动词，即：不能再句子中独立充当句子成分。而是与实义动词 一起使用构成复合用语。常配合主要动词，协助构成否定句，疑问句，强调句，时态，语态等语法形 式。基础助动词有：be, do情态助动词基本用法总结：情态动 词用法否定式疑问式与简答can能力（体力，智力，技能） 允许或许可（口语中常用）can not / cannot /cant doCan. do. ?Yes, .can./No, .cant.may可以（问句中表示请求） 祝愿（用于倒装句中）may not doMay. do.?Yes, .may.No, .mustnt/cant.mus t必须，应该（表主观要求） 肯定，想必（肯定句中表推测）must not/mustnt doMus t. do. ?Yes, .must.No, .neednt/dont have to.shall用于一三人称征求对方意见shall not/shant doShall. do. ?Yes, .shall. No, .shant.should应当，应该（表义务责任）should not/shouldnt doShould. do. ?will意愿，决心请求，建议，用在问句中wouldwill not/wont doWill. do.?Yes, .will. No, .wont.would比较委婉would not/wouldnt do二助动词的功能 助动词协助主要动词完成以下功用，可以用来：a. 表示时态，例如：What are you reading?（你正在阅读什么？）I am reading a magazine.（我正在阅读杂志。He is singing. 他在唱歌。We are working hard in the garden.（构成现在进行时）b. 构成疑问句，例如：Do you like college life? 你喜欢大学生活吗？Do you live in Shanghai?c. 与否定副词not合用，构成否定句，例如：I dont like him. 我不喜欢他。助动词练习一. 把下列句子变为一般疑问句。公式：助动词+主语+句子剩余部分。I. It is a lovely dog. 2.She is a lovely girl. 3.We are classmates. 4.1 am a doctor. 5. There is a bird in the tree. 6. They are good friends. 7.1 love my parents. 9. We have a pleasant home. 10. They go to church on Sunday. II. You are a singer. 二. 用 do does be 填空1 she know all the answers ?Yes , she . No, she .2_ the twins often fight ?Yes ,do. No, dont.3_ your dad like listening to music?Yes , does . No, doesnt.4_ you have a new teacher?Yes ,I . No, I .5_ she a teacher?Yes, she . No, she .6 your father smoking in the living room?Yes,is .No, he.情态助动词练习一. 将下面各组词组成句子(注意：标点符号)1. (an,aeroplane,hear,Lucy,can )2. (not ,he ,dance,can )3. ? (you,can ,see,wha t )4. (can ,see ,not ,we ,you)5. . (I ,can ,help ,you )6. ? (you ,can ,dance)二. 选择1. ()Dad, may I watch TV?No, you cant. You finish your homework first.A. mustB. canC. may2. ()Must I be home before eight oclock, Mum? No, you. But you have to come back before ten oclock.A. needntB. cantC. mustnt3. () I borrow your history book?Sure. Here you are.A. MustB. MayC. NeedD. Will4. () you like some bread ?A . Would B. Could C . Can5. () We hrow the was te in the zoo.A. cant B. dont C. mustnt6. () We should more flowers, and we shouldnt cut any flowers.A. plant B. planting C. plants7. () May I have some water? A. Yes,you have.B. Yes,you can.C. Yes,certainly.8. () Shall we work on the farm ? A. Yes, we do.B. Yes, we shall.B. All right.9. () Would you have something to announce? A. Yes, we would. B. Yes, Id like . C.Yes, of course.10. () Can I help you? A.Yes, you can. B.No, I can do it. C.Yes. Id like some oranges. 三填空1. Must I stand up? No, you .2. I speak something? Yes, you .3. I leave the park now? No, you s t a y here.4. My grandmother is ill. I s t a y at home and look after her.5. you like some juice?6. They take more exercise.7. you tell me the way to the museum?8. The watch tell us the right time.9. you like to go boating with us?10. we play chess next weekend?四按要求改写句子。1. She can walk quickly.I qu i c k l y . (否定句)2. They can paint the wall well. (一般疑问句) t h e y the wall well?3. Tom mus t carry the box into the room. (否定句)Tom carry the box into the room.4. She should reach the station early.(否定句)She reach the station early.