be动词的几种形式与用法

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1、Be动词的几种形式与用法,be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。 否定句：主语+ be + not +其它。 I am a student. I am not a doctor. She is Lucy. She is not Lily. They are at home, They are not at school.,疑问式与简略回答 一般疑问句：Be +主语+其它？ 回答：Yes, 主语+be. / No, 主语+be+not. Are you a teacher? Yes, I am. / No, I am not. Are

2、 you students? Yes, we are . / No, we arent. Is he a worker? Yes, he is. / No, he isnt.,缩略形式 eg: Im a boy. Im not a nurse. Youre ten years old. 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

3、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 _ not. 2. The girl_ Jacks sister。 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

4、_ at school. 9. Whose dress _ this? 10. Whose socks _ they? 12. Who _ I ?,写出下列词适当形式:,1.I am (缩略形式) _ _ 2.is (复数)_ _ 3.we are (缩略形式) _ _ 4.are not(缩略形式) _ _ 5.is not (缩略形式) _ _ 6. its(完整形式) _ 7.shes(完整形式) _ _ 8. theyre(完整形式) _,按要求完成句子,1.His brother is a teacher. 否定句: 一般疑问句: 回答： 2.Those are his parents. 否定句: 一般疑问句: 回答： 3.Im 14 years old. 否定句: 一般疑问句: 回答：,按要求完成句子,4.The ruler is on the desk. 否定句: 一般疑问句: 回答： 5.My shoes are 20 yuan . 否定句: 一般疑问句: 回答： 6.My name is Andy. 否定句: 一般疑问句: 回答：,