英语中的Be动词分为 am\is\are
I am ....
I am a teacher .
I am a student .
I am ten years old .
You are .....
You are a girl .
You are girls.
She\he\it is ....
She is a girl
She is beautiful
he is a boy .
he is my son .
It is a dog 
They \ we are .. ...
主语（单数）+is
主语（复数）are
用Be动词的适当形式填空
1.Amy ______her sister .
2.His name ______Tom
3.Her brother’s name ______John .
4.This ______my mother.
5.That ______ my father.
6.I ______thirty years old .
7.She ______beautiful.
8.My mother______ a doctor.
9.Lucky ______ an  English  teacher .
10.Lucky and Tom ______ my friends.
11.I ______from JiLin City
12.You ______my  English  teacher .
13.They ____clever .
14.We _____friends .
15.Lily ______cute.
16.It ______Tom’s pet .
17.He _____tall .
18.Joy ,Lily and Tom ______active.
19.Yao yao____good at roller skating.
20.They____ good at basketball.
21.He _____ good at science
22.Li ly ______  cute and friendly .
23.His father _____ an English teacher.
24.These cats _____crying .
1. I _____not good at computer.
2.The girl ____ Tom’s sister
3.______your brother in the classroom?
4.Mike and Tom _____at school
5.That _____ my red T-shirt.
6.This _____my LingLing’s pen.
7.___ Mr Lin a dancer now?
8.---Sam, please pass me the hat.
--- Here you ______
9.Tom
三年级语法练习
一：用 Be动词的适当形式填空
1.I ________  a boy 
2.He _______ my father. 
3.She _______ a teacher .
4.It _____ a dog .
5.You ______ a student
6.You _______ students .
7.I ______10 years old
8.We _______friends
9.They______my friends
10.My father ________ teacher .
11.My mother _____a teacher
12.He _____tall
13The girl ____ my sister
14.The girls _______my sisters
15.Lucky and Tom _______my friends
16.Lucky ____my friend.
17.I ______from Ji lin City .
18.This ______my mother.
19.That ______ my father.
20.These _____ my dogs
21Those_____my cats .
22.My name ______ 李亦轩
23 The dog _____black .
24 He ____ in the art room.
25This____ my father .
27That _____my mother .
28 Your sisters ______tall.
29.The books _____on the desk .
30.Mike and Kitty _____at the zoo.
31 Amy _____ my sister .
三年级
将下列句子变为疑问句和否定句（疑问句需做肯定回答和否定回答）
(is not = isn’t , are not = aren’t )
I am a stduent                             
疑问句：                                  否定句
You are a stuednt . 
疑问句：                                  anglababy否定句
You are students
疑问句：                                  否定句
She is a girl  .   
疑问句：                                  否定句
He is a boy.
疑问句：                                  否定句
It is a dog .
疑问句：                                  否定句