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1、精选优质文档-倾情为你奉上六年级英语练习（二）Name_小学英语六年级情态动词用法归纳情态动词有can (could), may (might), must, have to, shall (should, will (would), need (needed),等。 情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语 一、 can, could 1) 表示能力（体力、知识、技能）。 Can you lift this heavy box?（体力） Mary can speak three languages.（知识） Can you skate?（技能） 此时可用be ab
2、le to代替。Can只有一般现在时和一般过去式；而be able to则有更多的时态。 Ill not be able to come this afternoon. 当表示“经过努力才得以做成功某事”时应用be able to，不能用Can。如： He was able to go to the party yesterday evening in spite of the heavy rain. 2) 表示请求和允许。 -Can I go now? - Yes, you can. / No, you cant. 此时可与may互换。在疑问句中还可用could, might代替，不是过去式
3、，只是语气更委婉，不能用于肯定句和答语中。 - Could I come to see you tomorrow? - Yes, you can. ( No, Im afraid not. ) 3) 表示客观可能性（客观原因形成的能力）。 Theyve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 4) 表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。 Can this be true? This cant be done by him.
4、 How can this be true? 二、 may, might 1) 表示请求和允许。might比 may语气更委婉，而不是过去式。否定回答时可用cant 或mustnt，表示“不可以，禁止”。 -Might/ May I smoke in this room? - No, you mustnt. - May/Might I take this book out of the room? - Yes, you can. (No, you cant / mustnt. ) 用May I.？征徇对方许可时比较正式和客气，而用Can I.？在口语中更常见。 2）用于祈使句，表示祝愿。 Ma
5、y you succeed! 3) 表示推测、可能性（不用于疑问句）。 might不是过去式，它所表示的可能性比may小。 1He may /might be very busy now. 2Your mother may /might not know the truth. 三、 must, have to 1) 表示必须、必要。 You must come in time. 在回答引出的问句时，如果是否定的，不能用mustnt（禁止，不准），而用neednt, dont have to（不必）. - Must we hand in our exercise books today? - Y
6、es, you must. - No, you dont have to / you neednt. 2) must是说话人的主观看法， 而have to则强调客观需要。Must只有一般现在时， have to 有更多的时态形式。 1 His play isnt interesting, I really must go now. 2 I had to work when I was your age. 3) 表示推测、可能性（只用于肯定的陈述句） 1 Youre Toms good friend, so you must know what he likes best. 2 Your mot
7、her must be waiting for you now. 四、need 1) need 作情态动词用时, 常用于疑问句、否定句。在肯定句中一般用must, have to, ought to, should代替。 1You neednt come so early. 2. - Need I finish the work today? - Yes, you must. / No, you neednt. 注意:对must构成的一般疑问句作否定回答只能用neednt. 实战练习一英汉互译1.节约能源 _ 2.浪费水_3.砍伐树木 _ 4.保护地球_5.收集塑料瓶_ 6.使用纸袋和玻璃杯_
8、7. make a poster_ 8.use too much plastic bags_9. reuse old textbooks_ 10. at the school gate_二、单项选择。( ).Look! There are too many _ in the river.A.fish B.plastic C. rubbish D.water( ) 2. We _ use too many plastic bags,A. should B.shouldnt C.can D.dont( ) 3. Trees help _ the air clean.A.keeping B. for
9、 keep C. keep D. keeps( ) 4. Dont use _ plastic , Mum.A.too many B too much C. much too D many too( ) 5. We can use water _things.A.to clean B cleaning C. clean D. cleans( ) 6. Coal is _ useful energy.A.an B a C. / D the( ) 7. There _ too much water on the farm.A.isnt B. arent C. werent D.want( )8.
10、Do you know the news? Yes, Mike _ me _ it yesterday.A.told, about B.tells, for C. says, about D.said ,about( )9. There are a lot of oranges _ the trees.A.in B. at C. on D. of( )10._ a nice poster.A.How B whats C.what D. how is( ) 11. _ comes from trees.A.Coal B wood C. water D. Rubbish( ) 12. When i
11、s World Environment Day? Its _.A.in 10th September B.on 5th June C.in 22nd April D.on 22nd April( )13. _our classroom clean, we cant litter . A. To clean B Cleaning C. Clean D. Cleans( )14. Reading in bed is _ for our eyes.A.good B bad C. useful D.beautiful( )15. We can _ after school.A.walk to home
12、 B.go to home C. walk home D. went home三用括号中的词的适当形式填空1. We should _(eat) fruit and vegetables every day.2. Mr Green_(drink) too much yesterday.3._(not waste) water, please.4. He starts_(draw).5. There are three plastic _(bottle) on the table.6. The books are_ (use).They are good for your study.7. We
13、 use wood _(make) things8. They cut down too many _(tree).9. One day, Bobby _(throw) a banana skin on the ground.10. Billy_(slip)on the banana skin and _(fall),then he went to hospital.四根据句意和首字母填空1.You should not waste paper. You should s_ paper.2.The tap is running. Dont w_ water.3.You are so fat.
14、You shouldnt eat too m_.4.W_comes from trees.5.Most of our energy c_ from c_ and oil.6.Please throw these three plastic b_into the bin.7. Oh, what a day! Its r_ now. It often r_ in summer.五、搭配题。( ) 1. Do you like playing football？ A. They are running.( ) 2. Can you draw it? B. This is Helen speaking
15、.( ) 3. What are they doing? C. No. Shes in the office.( ) 4. Is Miss Li in the study? D. No, I cant.( ) 5. Whos that speaking? E. Yes, I do.( ) 6.How can we keep the air clean? F. Its on 22nd April.( ) 7.What should they not do? G.We can plant more trees.( ) 8.Is threr too much oil on Earth? H.Yes,
16、 he does.( ) 9.Does your brother live in the city? I.No,there isnt( ) 10.When is Earth Day? J.They shoudnt waste water.六句型转换1. Su Hai watched TV at home on Sunday.( 对划线部分提问)What_Su Hai _ at home on Sunday?2.Miss Li sat at the back of the bus.( 改成否定句)Miss Li_ _ at the back of the bus.3.They had an En
17、glish lesson now.(用now改写句子)_ _ an English lesson now.4.Its rainy today.(对划线部分提问)_ the _ like today?5. Sam goes to school on foot. (同义句) Sam _ _ school.七、阅读短文， 判断正(T)误(F)。Mary is an English girl. She likes watching basketball matches, but she doesnt have much money to buy tickets（票）。She has to watch
18、the matches on TV at home when she has no homework. She must（必须）go to school from Monday to Friday, so she misses a lot of interesting matches. There will be a big basketball match in the afternoon next day. Mary wants to watch it very much. But her father doesnt think（认为）its good. Because it is Fri
19、day, Mary must have lessons.( ) 1. Mary comes from the US.( ) 2. She often watches the basketball matches on TV.( ) 3. Mary misses a lot of matches because she has not much money .( ) 4. She goes to school from Monday to Saturday .( ) 5. Her father doesnt think its good to watch basketball on Friday
20、, because Mary has lessons that day .八、完形填空。A good environment (环境)can _1_people feel（感到）happy. We should make a green world. We should _2_ more trees. We _3_ cut down too many trees. We should stop factories from pouring (倾倒) _4_ water into rivers. We should save _5_. We should not drive too much.
21、We can go to work or school by bus or _6_. We can reuse paper and plastic bags. We can make the world a better(更好) place.1. ( )A. protect B. makes C. make2. ( )A. water B. plant C. buy3. ( )A. can B. should C. shouldnt4. ( )A. dirty B. clean C. much5. ( )A. trees B. energy C. water6. ( )A. by taxi B. by car C. on foot专心-专注-专业