3、系动词Be(am, is, are)的用法.doc

系动词Be(am, is, are)的用法一、am,is are 都属于be动词，be是他们的原型be动词的一般现在时有三种形式，即：am, is, are1、基本形式：am、are、is(1)、am第一人称I+am (注意：“I”无论何时都要大写，不管位于句首还是句中)例：I am a beautiful girl. I am twenty.I am 还可缩写成I'm 如： I'm David. 我是大卫但是am与not不能缩写2)、are第二人称you+are; 一人称复数we+are； 三人称复数they+are 其他复数名词+are (注意：第二人称单复数同形，都为you) 例：You are my good friend. We are in the same class.They are on the road. The books are on the desk. are与主语还可缩写如： We are= We're， They are =They're, You are = You're。

而are与 not可缩写成aren't3)、is第三人称he(男) +is ; she(女)+is; it(不是人)+is;其他单数名词+is例：He\She is a good student. It is a white cat. A dog is on that street.is也可与主语缩写,如: He is = He's, My mother is = My mother's等但是This is不可缩写而is与not可缩写成 isn't如:This isn't a book. 这不是一本书二、请记住以下口诀：我用am，你用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 疑问否定任你变，句首Am,Is,Are大写莫迟疑，,句末问号莫忘加三、注：复数主语全用are指示代词作主语,This、that用is，These、those要用are回答一般疑问句,Yes,或No简回will/can/could/would/should/shall 等助动词后面加be其他时候, 第一人称I后面用am 第二人称, 复数, 用are 单数用is... 四、由连系动词am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。

变否定句时直接在am，is，are后面加not即可例如： 肯定句:He is a student. 一般疑问句: Is he a student?否定句: He is not a student.画线提问: 对he提问: Who is a student? 对 a student 提问: What is he?另：特殊疑问句中：where\how\who\what\why+be动词+人称代词或名词？例：What is your name? My name is GaoBuHan.Where are you? I’m in the classroom.五、Be动词在一般过去时中的变化：be动词的一般现在时有两种种形式，即：was，were1．am 和is在一般过去时中变为waswas not = wasn’t）2．are在一般过去时中变为werewere 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调到句首一、练习:用恰当的be动词填空。

1)I _____ a student. 2) You ____ a teacher. 3)____she from Jinan? No, she ____. 4) _____you friends? No, we ____.5) He _____ in Class 4, Grade 1. 6) It_____ a car.7) They ____ cars. 8) ____ your mother in China?9) _____your friends in New York? 10) What ____her name?11) These _____ buses. 12) Those _____oranges.13) Where _____ her mother? 14) How old _____your teacher?15) What class _____ you in? 16)This ____ my brother.17)That ____ a pencil. 18)Mike and I____ students.19)____ there an apple on the table? Yes, there ____. 20)There____many books in the study. 21)There____some ice cream in the fridge. 22)There____a pear and some cakes on the table. 23)The children___ playing in the bedroom. 24)The rabbits___ eating grass. 25)What___ your favorite subject? 26)The girl___ drawing. 27) "I"___ a letter（字母.） 28.The socks ______ on the desk. 二、用is, are填空 1. There ______ a spoon on the plate. 2. There ______ some milk on the table. There ______ coffee, too. 3. There ______ some clouds in the sky. There ______ some boats on the river. 4. There ______ some knives in the box.  5. There ______ a newspaper in the living room. 6. ______ there any books in the room? Yes, there ______ .  ______ there any magazines on the television? No, there ______ . 7. There ______ a policeman in the kitchen.   8. There ______ 60 minutes in an hour. 9. There ______ a pencil, a ruler and 2 books on the desk.  10. There ______ 2 glasses and a cup on the table.三、将下列句子改为否定句和一般疑问句，并做肯定或否定回答。

1. It was exciting. 否定句：________________________________________________ 一般疑问句：____________________________________________ 肯、否定回答：__________________________________________2. All the students were very excited. 否定句：________________________________________________ 一般疑问句：____________________________________________ 肯、否定回答：__________________________________________3. They are in his pocket. 否定句：________________________________________________ 一般疑问句：____________________________________________ 肯、否定回答：__________________________________________4. There was a car in front of the house just now. 否定句：________________________________________________ 一般疑问句：____________________________________________ 肯、否定回答：__________________________________________5、There are some peaches on the tree. 否定句：________________________________________________ 一般疑问句：____________________________________________ 肯、否定回答：__________________________________________6 .The boy is drawing in the art room.否定句：________________________________________________ 一般疑问句：________________________________。