Be动词专项讲解和练习一、语法讲解：1、含义：be 动词的意思为“是”或者“在”，表示一般性的状态它包括三个形式：am, is, are ，具体用法口诀：I 用 am，you 用 are，其他就看单复数，单数 is 复数 are疑问句，用哪个，要到后面找主语例句：I am happy. 我很快乐 You are a beautiful girl. 你是一个美丽的女孩 He is in the supermarket. 他在超市里 Tom and Mike are playing football. 汤姆和迈克正在踢足球缩写形式：I am = I’m You are = You’re We are = We’re They are = They’re He is = He’s She is = She’s It is = It’s is not = isn’t are not = aren’t （注意：am not 没有缩写形式，肯定回答时不能缩写）2、变句型口诀：变否定，很容易，be后not别忘记； 变疑问，be提前，句末问号莫丢弃； 否定疑问随心变，句首字母要大写。
注：变疑问句时：I am 变为Are you my, our 变为 your some 变为 any （一些）例句：I am happy. 否定句 I am not happy. You are a beautiful girl. 一般疑问句 Are you a beautiful girl? My name is Andy. 特殊疑问句 What is your name?3、带be 动词的其他句式（1）This（这个）That（那个）做主语时，谓语用isThese（这些）Those（那些）做主语时，谓语用 are注：变句型时，回答要用it 或者 they如： This is an eraser. 这是一块橡皮否定句：This is not an eraser. 这不是一块橡皮一般疑问句：Is this an eraser? 这是一块橡皮吗？回答：Yes, it is. / No, it isn’t. These are crayons. 这些是蜡笔否定句：These are not crayons. 这些不是蜡笔。
一般疑问句：Are these crayons? 这些是蜡笔吗？回答：Yes, they are. / No, they aren’t.（2）Here（这里）做主语时，谓语要看后面名词的单复数，单数用is，复数用are，如：Here is a book for you. 这有一本书送给你 Here are some peanuts for you. 这有一些花生送给你3）There be 句型：一般表示某地有某物，翻译为“有”，谓语动词根据后面紧挨着的第一个名词的单复数来决定（就近原则），单数用is，复数用are 例句：There is a pencil and some books in my schoolbag. 在我的书包里有一支铅笔和一些书There are some books and a pencil in my schoolbag. 在我的书包里有一些书和一支铅笔注：变句型时，回答主语仍为there 如： There is a knife on the desk.否定句： There is not a knife on the desk.一般疑问句：Is there a knife on the desk?回答：Yes, there is. / No, there isn’t.4、带有be动词的特殊疑问句（对划线部分提问）特殊疑问词+be动词+主语+其他特殊疑问词包括：（1）单独疑问词：what什么，who谁，when什么时候，where在哪里，how怎么样，why为什么（2）组合疑问词：what color什么颜色，how old多大年纪，how many多少，how much多少钱对划线部分提问要根据划线部分的内容来选择特殊疑问词，对事或物提问用what，对人提问用who，对时间提问用when，对地点提问用where，对状态和交通方式等提问用how，对原因提问用why具体句式：特殊疑问词+一般疑问句的句式（划线部分去掉）如：Lucy is watering flowers in the garden.→ What is Lucy watering in the garden?Lucy is watering flowers in the garden.→ Who is watering flowers in the garden?Lucy is watering flowers in the garden.→ Where is Lucy watering flowers?默写be动词的三个形式： 我是： = 他是： = 他们是： = 二、练习am, is, are 选择填空：（不可数名词：tea，water等等，谓语动词要用单数形式is）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.21. My sister's name ______Nancy.22. This ______ not Wang Fang's pencil.23. ______ David and Helen from England?24. There ______ a girl and two cats in the room.25. There ______ some apples on the tree.26. _______ there any kites in the classroom?27. _______ there any apple juice in the bottle?28. There _______ some bread on the plate.29. There _______ a boy, two girls, three men and ten women in the park.30. You, he and I ______ from China.变句型：1. I am good at running.否定句： 一般疑问句： 回答： 2. Bill is writing an e-mail.否定句： 一般疑问句： 回答： 3. My mother is cooking dinner.否定句： 一般疑问句： 回答： 4. There are some chairs in my classroom.否定句： 一般疑问句： 回答： 5. Binbin and Andy are flying a kite.否定句： 一般疑问句： 回答： 6. This is a cute bird.否定句： 一般疑问句： 回答： 7. My grandfather is watching TV.否定句： 。