《be动词、助动词、情态动词讲解(基础篇)第一讲-》由会员分享，可在线阅读，更多相关《be动词、助动词、情态动词讲解(基础篇)第一讲-（6页珍藏版）》请在金锄头文库上搜索。
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：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 pla
2、ying 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
3、说的“主语 + 谓语 + 其他”。 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 dont 动词原形 其他 。 We dont 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 dont.特殊疑问句：疑问词 + do + 主语 + 动词原形 + 其他 + ？ How often do you watch TV?
4、 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+ doesnt+动词原形+其他+。 He doesnt 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 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
5、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 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 / W
6、e didnt 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 / 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
7、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), should, must, will (would), ought to, have to, need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 +
8、主语 + 动词原形 + 其他 + ？ Can she / they swim well? Yes, she / they can. / 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. Mybrother_ a teacher. He _ his pupils very much. A. is, like B. is, likes C. are, likes D. are, like2. A: How many
9、days _ there in a week? B: There _ seven. A. is, is B. are, are C. is, are D. are, is3. The boy _ ill today. A. are B. is C. be D. am4. What _ your father _? A. do, likeB. is, likeC. are, likesD. does, like5. _ you go to school by bus?A. AreB. IsC. DoD. Does6. When _ your birthday?A. areB. isC. doD.
10、 does7. Which _ bigger, the sun or the moon? A. are B. is C. Be D. 8. My teacher often _ shopping on Sundays.A. goesB. gosC. goD. goed9.Listen! The children_.A. singsB. are singingC. is singingD. is sing10. Her voice _ like my mothers. A. sounds B. sound C. looks D. look11. It often rains and the cr
11、ops _ fast. A. get B. turn C. grow D. become12. A: How are you _ now? B: Much better, thank you. A. getting B. feeling C. making D. turning13. He _ swimming.A. dont likesB. doesnt likesC. not likeD. doesnt like14. What _ they _ on Saturdays?A. does, doesB. do, doC. do, doesD. does, do15. Yang Ling_d
12、o exercise with_. A. doesnt, usB. dont, weC. /, usD. dont, usI.填入适当的谓语动词1.I_aboy._you aboy?No,I_ not.2.Thegirl _Jackssister. 3.Thedog_tallandfat. 4.Themanwithbigeyes_ateacher. 5._yourbrotherintheclassroom? 6.Where_yourmother?She_athome.7.How_yourfather? 8.MikeandLiuTao_atschool. 9.Whosedress_this? 10.
