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。
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与主语还可缩写。如: We are= We're。
而are与 not可缩写成aren't。如:They aren't students. 他们不是学生。
单数名词用is,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:Is not it a book(疑问否定句)
巩固练习
1、Helen____ a student
2、This _____my book.
3、My father______a cook.
4、Jack’s friend____in the study.
5、Your mother_____swimming.
6、Your sister______in the study.
7、Those jackets_______my sister’s.
8、That______her dog.
9、The cat_______on the desk.
10、The books_______under the table.
11、His sisters______running.
12、This train____for 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 nurseYes, I am.
21、There a lot of sweets in the box.
22、There some milk in the glass.
23、There some people under the the big
24、There a picture and a map on the w
25、There a box of rubbers near the books.
26、There lots of flowers in our garden last year.
27、There a tin of chicken behind the fridge yesterday.
28、There four cups of coffee on the table.
29. I ______ a 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
jeans ______ on the desk.
______ a scarf for you.
43. Here ______ some sweaters for you.
44. The black gloves ______for Su Yang.