小学be动词讲义(教师整理精华版)

1、Be动词专题讲义一概念Be动词有三个：am，is，are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。二用法剖析1. 如果主语是第一人称I（我）时，be动词用am。 I am 还可缩写成I'm。如： I'm David. 我是大卫。2.如果主语是第三人称代词、单数名词或不可数名词时，be动词用is。如: He is a student. 他是一名学生。My mother is a teacher. 我的妈妈是一名老师。is也可及主语缩写。如: He is = He's, My mother is = My mother's等。

2、但是This is不可缩写。而is及not可缩写成 isn't。如:This isn't a book. 这不是一本书。3. 如果主语是第二人称you ，be动词必须用are。 如果主语是名词复数 （两个以上的人或物）时，be动词必须用are。如： Tom and Lily are good friends. 汤姆和莉莉是好朋友。 They are at school. 他们在学校。are及主语还可缩写。如： We are= We're。而are及 not可缩写成aren't。如：They aren't students. 他们不是学生。单数名词用is，

3、复数名词全用are。如：The book is over there.(一本书）The books are over there.（多本书）疑问句变化口诀:变疑问，be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，句首大写莫迟疑。变疑问，往前提，句末问号莫丢弃。(陈述句中谓语为is,are,am时，变疑问句只将其提前）如：It is a book.变为：Is it a book?变否定，更容易， be后not莫忘记。如：It is a book.变为: It is not a book.(否定句）疑问否定任你变，句首大写莫迟疑。如：It is a book.变为：I

4、s not it a book?(疑问否定句）巩固练习第 4 页1、Helen_ a student 2、This _my book.3、My father_a cook.4、Jacks friend_in the study.5、Your mother_swimming.6、Your sister_in the study. 7、Those jackets_my sisters.8、That_her dog. 9、The cat_on the desk. 10、The books_under the table.11、His sisters_running. 12、This train_fo

5、r Shanghai.13、The dress_too big.14、This book_for you.15、The waitress_my mother. 16、Those grapes_green.17、The children_singing.18、Helen and I_in the classroom. 19、I _a doctor.20、_you a nurse?Yes, I am.21、Therea lot of sweets in the box.22、Theresome milk in the glass.23、There some people under the the

6、 big tree.224、Therea picture and a map on the w25、There a box of rubbers near the books.26、There lots of flowers in our garden last year.27、Therea tin of chicken behind the fridge yesterday.28、There four cups of coffee on the table.29. I _ a boy._you a boy? No, I _ not. 30. The girl_ Jack's sister. 31. The dog _ tall and fat. 32 The man with big eyes _ a teacher. 33 _ your brother in the classroom? 34. Where _ your mother? She _ at home. 35. How_ your father? 36 Mike and Liu Tao _ at school. 37. Whose dress _ this? 38. Whose socks _they? 39. That _ my red skirt. 40. Who _ I? 41.The jeans