be动词用法练习题（1）1.选择正确的be动词填空。（1）I _ a student. （2）We _ friends.（3）He _ a good boy. （4）She _ is my sister.（5）They _ playing football. （6）You _ my friend.2.现在进行时练习：1）I _ a boy. _ you a boy? No, I _ not. 2）The girl_ Jacks sister. 3）_ your brother in the classroom? 4）Who _ I? 5）The jeans _ on the desk.6）My sisters name _Nancy. 7）There _ a girl in
