1. 动词be（am,is,are）的用法：
be动词包括“am”, “is”, “are”三种形式。 ① 一人称单数(I)配合am来用。句型解析析：I am+… 例句：I am Snoopy. I am ten years old.
I am a student. I am a boy.
②第二人称(You)配合are使用。句型解析：You are+… 例句：You are my good friend.
You are a good teacher. You are beautiful
③第三人称单数(He or She or It)配合is使用。句型解析：She(He, It) is +…… 例句：She is a good girl.
She is so tall. She is short.
④人称复数 (we /you/they)配合are使用。句型解析：We (You, They) are +…… 例句 We are in Class 5,Grade 7.
They are my friends. You are good students. 用法口诀：
我(I)用am, 你(you)用are，is跟着他(he)，她(she)，它(it)。单数名词用is，复数名词全用are。变否定，更容易，be后not加上去。变疑问，往前提，句末问号莫丢弃。还有一条须注意，句首大写莫忘记。 对应练习：
一. 用括号中适当的词填空。
1. I ________(am, are, is) from Australia. 2. She _______ (am, are, is) a student.
3. Jane and Tom _________(am, is, are) my friends. 4. My parents _______ (am, is, are) very busy every day.
5. _______ (Are, Is, Do, Does) there a Chinese school in New York? 6. _______ (Be, Are, Were, Was) they excited when he heard the news? 7. There _____ (be) some glasses on it.
8. If he _____ (be) free tomorrow, he will go with us. 一、用be 动词的适当形式填空
1. 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? 11. That ______ my red skirt. 12. Who ______ I?
13.The jeans ______ on the desk. 14.Here ______ a scarf for you. 15. Here ______ some sweaters for you.
16. The black gloves ______ for Su Yang. 17. This pair of gloves ______ for Yang Ling. 18. The two cups of milk _____ for me.
19. Some tea ______ in the glass. 20. Gao shan's shirt _______ over there.
Be动词用法口诀：
1、Be有am、is、are 2、我(I)用am，你(you)用are
3、is连着他(he)她(she)它(it)4、你们(you) 我们(we)他们(they)也用are 5、单数名词用is 复数形式要用are 二、Be动词句型
1、变否定，be后加not就可以，否定简写isn’t，aren’t不忘记， 2、一般疑问be动句首提，句尾问号要加起（？） 应用时多注意缩写形式要牢记：
I'm=I am you're=you are he's=he is she's=she is it's=it is we're=we are you're=you are they're=they are ... ...
1. is和are可分别与not缩写为isn’t和aren’t，但am却不能与not缩写为amn’t ，虽然有人把它缩为ain’t，但这毕竟是规范的口语说法，不宜仿用。
2. 陈述部分为第一称肯定式时的反意疑问句，通常用aren’t如：I’m late, aren’t I?我迟到了，是吗？
3. 不要认为在主语之后总是用am。试看：Both he and I are right. 他和我都对。或他和我都不对。 Neither he nor I am (或are) right. 他和我都不对.\"I\" is an English letter. I是英语字母。 4. 当am, is are 位于句末时，均不能与主语缩写。如：
Tell me where he is (不能用he’s )。告诉我他在哪儿。 He is taller than I am (不能用I’m )。他比我高。
A：Are they watching TV? 他们在看电视吗？B：Yes, they are. (不能用they’re)是的。 注：若其后有not时，am, is, are则可以与主语缩写，其中is和are 也可与not 缩写。如： Are they watching TV? -No, they’re not (或they aren’t). 二、Be动词在一般过去时中的变化：
1．am 和is在一般过去时中变为was。（was not = wasn’t） 2．are在一般过去时中变为were。（were not = weren’t）
3．带有was或were的句子，其否定、疑问的变化和am,is, are一样，即否定句在was或were后加not，一般疑问句把was或were调到句首。 把下列句子改成否定句和一般疑问句。 1. This is the reading room.
否定句：_______________________________ 一般疑问句： ____________________________
肯定回答： ____________________________ 否定回答：____________________________ 2. She’s Miss Smith.
否定句：_______________________________ 一般疑问句： ____________________________
肯定回答： ____________________________ 否定回答：____________________________
