Be动词的几种形式

1、Be动词的几种形式与用法be动词包括am, is，are.肯定式否定式1 am a sindent.1 am not a student.He /She/lt isHe /She/lt is notWc/You/Thev arc.JWc/You/Thev arc not一.肯定式与否定式（以人称代词为例）肯定句：主语+bc+其它。否定句：主语+ be + not +其它。1 am a student.1 am not a doctor.She is LucyShe is not Lilv.They arc at home,Thev arc not at school.J7/疑问式与简略回答疑问

2、式简略回答Am I?Yes, 1 am. No, 1 am not.Is he/ she/ it?Yes, he/ she/ it is. No, he/ she/ it isn" tArc we/ vou/ they?Yes, we/ you/ they arc.No, we/ you/ they 他5 t一般疑问句：Ec+主语+其它？回答：Yes,主语+bc./ No,主语+be+not.Arc vou a teacher?Arc you students?Is he a worker?Yes, 1 am./ No, I am notYes, we arc / No, we ar

3、en' t.Yes, he is / No, he isn' t.缩略形式肯定式否定式1 am4' mI' m not.you arc you' reyou' re not. / you aren' the ishc， she' s not / he isn' t she isshc， sshc， s not. / she isn' t.irisif sit" s not./ it isn" t.we arc we' rewe' re not. / we aren' t

4、they arc thev' rethev' re not. / they we aren' t eg： 1' m a boy.1' m not a nurse.You' re ten vears old.You' re not our classmates.JShe' s mv sister.She' not mv brother./JBe动词的用法口诀：I用am, you用arc, is连着他，她，它；单数名词用is,复数名词全用arc.-变疑问，往前提，句末问号莫丢弃；变否定，更容易，bu后叭莫忘记 疑问否定任你变，

5、句首大写莫迟疑。课堂习题用am, is, arc填空1. WhoI? Ia boy. you a boy? No, Inot.2. The girlJack's sistero3 The dogtall and fat.4. The mail with big eyesa teacher6. Wherevour mother? She7. Howvour father?8. Mike and Liu Taoat school.at home9. Whose dressthis?10. Whose sockslhev?12. WhoI ?写出下列词适当形式：1.1 am （缩略形式）.2is （复数）3-wc arc （缩略形式）.4.arc not（缩略形式）5.is not （缩略形式）.6. iis（完整形式）7.shJs（完整形式）8. the/ref完整形式）按要求完成句于l.His brother is a teacher. 否定句：一般疑问句：回答：2.Thosc arc his parents 否定句：一般疑问句： 回答：3I，m 14 years old. 否定句：一般疑问句： 回答：4.Thc ruler is on the desk5vour brother in the class