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1、Be动词的几种形式与用法!肯定式否定式I am a student.I am not a student.He /She/ItHe /She/It isisnotWe/You/TheyWe/You/They arearenotbe动词包括am, is, are.一肯定式与否定式（以人称代词为例）肯定句：主语+ be +其它。I am a student.否定句：主语+ be + not +其它。I am not a doctor.She is Lucy.She is not Lily.疑问式简略回答Am IYes, I am. No, I am not.Is he/ she/ itYes, h
2、e/ she/ it is. No, he/ she/ it isntAre we/ you/ theyYes, we/ you/ they are. No, we/ you/ they aren tThey are at home,They are not at school.疑问式与简略回答般疑问句：Be +主语+其它回答：Yes,主语+be. / No,主语+be+not.肯定式否定式I amTImI m not.you are Tyoureyoure not. / you arent.he isThes she isTshes it is Titshes not. / he isnt
3、. shes not. / she isnt. its not./ it isnt.we areT were they areT theyrewere not. / we are nt . theyre not. / they we arent .Are you a teacherYes, I am. / No, I am notAre you studentsYes, we are . / No, we arent.Is he a workerYes, he is. / No, he isnt.缩略形式eg: Im a boy.Im not a nurse.Youre ten years o
4、ld.Youre not our classmates.Shes my sister.She not my brother.Be动词的用法口诀：I用am, you用are,is连着他，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。课堂习题用am, is, are填空1. Who I I a boy. you a boy No, I not2. The gi rl Jacks sister。3. The dog tall and fat.4. The man with big eyes a te
5、acher.5. your brother in the classroom6. Where your mother She at home.7. How your father8. Mike and Liu Tao at school.9. Whose dress thi s10. Whose socks they？12. WhoI写出下列词适当形式：（复数）not（缩略形式）6. its（完整形式）8. theyre（完整形式）am （缩略形式）are （缩略形式）_not （缩略形式）_s（完整形式）_按要求完成句子brother is a teacher.否定句：一般疑问句：回答：are his parents.否定句:一般疑问句:回答：m 14 years old.否定句：答:回ruler is on the desk.否定句:一般疑问句:回答:shoes are 20 yuan .否定句:一般疑问句:回答：n ame is An dy.否定句:一般疑问句:回答：
