be动词、助动词、情态动词讲解(基础篇)第一讲

1、be动词、助动词、情态动词讲解 （基础篇）1、be动词的用法。beam / isare现在时waswere过去时单数复数英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就 用单数，反之用复数。句中含有be动词时：冃疋句：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 athome.The stude nts are

2、 play ing games.My teacher was illyesterday.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，复数名词全用变否定，更容易，be后not变疑问，往前提，句末问号莫丢弃; 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

3、+其他”。肯定句：I / We / They / The students 动词原形 其他 。 We watch TV every night.变否定：主语 dont 动词原形 其他 。We dontwatch 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 dont.特殊疑问句：疑问词 + do + 主语 + 动词原形 + 其他 + ？ How often do you watch TV? 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 +

4、 其他 + 。He watches TV every night.否定句：主语+ doesn+动词原形+其他+。He doesntwatch 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 doesnt.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。()

5、1. How your dad help at home?A. doB. doesC. is()2. goes bad easily in summer.A. MilkB.Apples C. Cakes 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 + didnt+ 动词原形 + 其他 + 。He / We didnt get up early every morning last year.一般疑问句：Did + 主

6、语 + 动词原形 + 其他 + ？Did he / you get up early every morning last year? Yes, he / we did./No, he / we didnt.特殊疑问句：疑问词 + did + 主语 + 动词原形 + 其他 + ?When did he / you get up every morning last year? 初中阶段， 助动词一般只出现在否定句或疑问句中， 助动词用在肯 定句中表示强调。3、情态动词的用法。 情态动词表示说话人的语气或情态。初中英语中，常见的情态动词有： can (could), may (might), s

7、hould, must, will (would), ought to, have to, n eed 等。 情态动词的共同点：不受主语单复数的影响；情态动词后用动词原 形。情态动词和动词原形共同构成谓语部分。肯定句：主语 + 情态动词 + 动词原形 + 其他 + 。 She / They can swim well.否定句：主语 + 情态动词 + not + 动词原形 + 其他 + 。 She / They can not swim well.一般疑问句：情态动词 + 主语 + 动词原形 + 其他 + ？ Can she / they swim well?Yes, she / they ca

8、n. /No, she / they cant.特殊疑问句：疑问词 + 情态动词 + 主语 + 动词原形 + 其他 + ?Why can she / they swim well?Who can swim well?练习选择填空：1. My brothera teacher. Hehis pupils very much.A. is, like B. is, likes C. are, likes D. are, like2. A: How many daysthere in a week?B: Thereseven.A. is, is B. are, areC. is, areD. are,

9、 is3. The boyill today.A. areB. isC. beD. am4. Whatyour fatherA. do, like B. is, like C. are, likes D. does, like5.you go to school by bus?6. WhenA. Are B. Is C. Do D. Doesyour birthday?7. WhichA. are B. is C. do D. doesbigger, the sun or the moon?A. are B. is C. Be D. x8. My teacher often shopping

10、on Sundays.A. goes B. gos C. go D. goed9. Listen! The children.A. sings B. are singing C. is singing D. is sing10. Her voice like my mothers.A. sounds B. sound C. looks D. look11. It often rains and the crops fast.A. get B. turn C. grow D. become12. A: How are you now?B: Much better, thank you.A. ge

11、ttingB. feeling C. making D. turning13. He swimming.A. don t likesB. doesn t likeCs. not like D. doesn t like14. What they on Saturdays?A. does, does B. do, do C. do, does D. does, do15. Yang Lingdo exercise with.A. doesn t, uBs. don t, weC. /, us D. don t, usI. 填入适当的谓语动词1. I _ a boy. you a boy? No,

12、 I _ not.2. The girl Jack ssister.3. The dog tall and fat.4. The man with big eyes a teacher.5. your brother in the classroom?6. Where your mother? She at home.7. How your father?8. Mike and Liu Tao at school.9. Whose dress this?10. Whose socks they?11. That my red skirt.12. Who I?13. The jeans on t

13、he desk.14. Here a scarf for you.15. Here some sweaters for you.16. The black gloves for Su Yang.17. This pair of gloves for Jim.18. Physics my favorite subject.19. The police running after the thief.20. Our class going to the zoo.ii .将下列句子奇数变成否定句，偶数变疑问句。1. I like music.2. He walks to school.3. They

14、 often have English on Monday.4. The boys are swimming in the river.5. She smiles happily.6. Mary went to the zoo last week.7. The workers made many cars in the factory.8. We should protect the innocent.9. Her parents fly to London twice a month.10. All my classmates climbed the Tai Mount last autumn.11. The teacher asks us to clean the classroom.12. He will go back