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。1. 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