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. _ (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： 肯定回答： 2. This is my mother. 否： 疑： 否定回答 3. It is a good book. 否： 疑： 肯定回答 4. Lily and lucy are friends. 否： 疑： 否定回答 5. He is my brother. 否： 疑： 肯定回答 6. His name is jerry. 否： 疑： 否定回答 7 . She is very good. 否： 疑： 否定回答