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1、be 动词用法歌：我用 am,你用 are，is 连接他，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，句首大写莫 迟疑。一. 用括号中适当的词填空。1. I _(am, are, is) from Australia.2. She _ (am, are, is) a student.3. Jane and Tom _(am, is, are) my friends.4. My father and mother _ (am, is, are) very busy every day. 5.
2、_ (Are, Is,) you a teacher?6. _ (am, is,are ) the box on the bed?7. Where _ (be) the girl.8. He _ (be) a boy.9. My mother _(be) is a teacher.10. _ (be) tom your brother?11. How old _(be) you?12. Who _(be) the boy?13. They _ (be) all students.14. We _ (be) good friends.15. _ (be) this your ruler?16. Lily and Lucy _ (be) girls.17. Your teacher_ (be) Emma.二： 把下列句子变成否定句和疑问句并作出肯定和否定回答。1. I am a teacher.否：疑：2. This is my mother.否：疑：3. It is a good book.否：疑：4. Lily and lucy are friends. 否：疑：5. He is my brother.否：疑：6. His name is jerry.否：疑：7 . She is very good.否：疑：肯定回答：否定回答肯定回答否定回答肯定回答否定回答否定回答