Be动词的几种形式与用法

按要求完成句子
• 4.The ruler is on the desk. • 否认句: • 一般疑问句: • 答复：
• 5.My shoes are 20 yuan . • 否认句: • 一般疑问句: • 答复：
• 6.My name is Andy. • 否认句: • 一般疑问句: • 答复：
疑问式与简洁答复
一般疑问句：Be +主语+其它？ 答复：Yes, 主语+be. / No, 主语+be+n
Are you a teacher?
Yes, I am. / No, I am not.
Are you students?
Yes, we are . / No, we aren’t.
Is he a worker?
She’ not my brother.
肯定式
I am→I’m
you are →you’re
he is→he’s she is→she’s it is →it’s
we are→ we’re they are→ they’re
否定式
I’m not.
you’re not. / you aren’t.
he’s not. / he isn’t . she’s not. / she isn’t. it’s not. / it isn’t.
写出以下词适当形式:
• 1.I am (缩略形式) ____ __
• 2.is ( are (缩略形式) ____ __
• 4.are not(缩略形式) ____ _
• 5.is not (缩略形式) _____ _
• 6. it”s(完整形式) _____
• 7.she”s(完整形式) _____ _
Be动词的几种形式与用法
be动词包括am，is，are.
一．确定式与否认式(以人称代词为例) 确定句：主语+ be +其它。 否认句：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,
Yes, he is. / No, he isn’t.
疑问式 Am I...... ? Is he/ she/ it......? Are we/ you/ they......?
简略回答
Yes, I am. No, I am not.
Yes, he/ she/ it is. No, he/ she/ it isn’t
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______ Jack”s 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 ______ at school. 9. Whose dress ______ this? 10. Whose socks ______ they? 12. Who ______ I ?
we’re not. / we aren’t . they’re not. / they we aren’t .
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; 变否认，更简洁，be后not莫遗忘, 疑问否认任你变，句首大写莫迟疑。
They are not at school.
肯定式
否定式
I am a student.
I am not a student.
He /She/It is......
He /She/It is not.......
We/You/They are...... We/You/They are not ......
• 8. they”re(完整形式) ___
按要求完成句子
• 1.His brother is a teacher. • 否认句: • 一般疑问句: • 答复：
• 2.Those are his parents. • 否认句: • 一般疑问句: • 答复：
• 3.I’m 14 years old. • 否认句: • 一般疑问句: • 答复：
Yes, we/ you/ they are. No, we/ you/ they aren’ t
缩略形式
eg: I’m a boy. You’re ten years old. She’s my sister.
I’m not a nurse. You’re not our classmates.