1、1be动词 动词 有第一人称 I am do dont 原型 have第二人称 you are do dont 原型 have单数第三人称she, he, it人名/地名/称谓主语/物品名isdoesdoesnt动词加 s/es has 复数 两个及其以上的人或物 they are do do 原型 have【一】含有 be 动词句子的变化：（Be 动词有 3 个：am, is, are）肯定句：I am a boy.(我是一个男孩)否定句：I am not a boy.（含有 be 动词的肯定句变成否定句，直接在 be 动词后面加not） 。一般疑问句：Are you a boy? 含有 b
2、e 动词的肯定句变成一般疑问句，直接把 be 动词提前，第一人称要变成第二人称肯定回答：Yes, I am.肯定词，主语+be 动词否定回答：No, Im not. 否定词，主语+be 动词的否定形式例如：He is a boy.【肯定句】 He is not a boy.【否定句】Is he a boy? 【一般疑问句】 Yes, he is.【肯定回答】 No, he isnt.【否定回答】【二】含有动词句子的变化：肯定句：I like robots.（我喜欢机器人） 否定句：I dont like robots.( 含有动词的肯定句变成否定句，在动词前面加 dont/doesnt，且后面
3、的动词恢复原形。 【当主语是单三人称的时候，用 doesnt，其余都用dont】肯定句：She likes robots.(当主语是第三人称的时候，后面的动词加 s/es)单三人称后面动词的变化情况1、 一般情况直接加 s2、 以 s, ch , sh, x, o 结尾的，加 es. 如：watch-watches. go-goes3、 以辅音字母加 y 结尾的，去 y 加 ies.否定句：She doesnt like robots.一般疑问句：Does she like robots?【含有动词的肯定句变成一般疑问句要借助助动词 do/ does单三人称用 does。 】肯定回答：Yes,
4、 she does.【肯定词，主语+助动词】否定回答：No, she doesnt. 【 否定词。主语+助动词的否定形式】一：选择题21. My brother _ a teacher. He _ his pupils very much.A. is, like B. is, likes C. are, likes D. are, like2、.The boy _ happy today. A. are B. is C. be D. am3、How many _ do you have?A、apple B. apples C. doll4. They_ students.A. are B. i
5、s C. am5、Betty_ my friend. She _ dolls.A. am ,likes B. is, like C. are, likes D. is ,likes二、用所给词的适当形式填空：1、My sister _ be a student.2、I _ be a boy.3、She_ like the doll.4、Tom _be my friend.5、You _ be a good boy.6、They(他们) _ be teachers.7、Betty _not like toy cars.8、My mother_like noodles.9、His friends_
6、likedogs.10、I _not like apples.三、将下列句子改为否定句，一般疑问句以及肯否定回答。 I am a boy. The boy likes the ball. I like the sweater My mother is a teacher. They are happy。1.I_ a boy. _ you a boy ? No, I _ not. 2. The girl_ Jacks sister. 3. The dog _ tall and fat. 4. The man with big eyes _ a teacher. 5. _ your brother
7、 in the classroom? 6. Where _ your mother? She _ at home.7. How _ your father? 8. Mike and Liu Tao _ at school. 9. That _ my red skirt. 10. Who _ I? 11.The jeans _ on the desk. 12. This pair of gloves _ for Yang Ling. 13. The two cups of milk _ for me. 14. Some tea _ in the glass. 315. My sisters name _Nancy. 16. This _ not Wang Fangs pencil. 17. _ David and Helen from England? 18. There _ a girl in the room. 19. There _ some apples on the tree. 20. There _ some bread on the plate. 21. You, he and I _ from China.
