Be动词Be动词包括：am（过去式 ）, is （过去式 ）, are（过去式 ） 口诀：I 用 ，you 用 , 复数都用 ， 用在其他。用恰当的Be动词填空：1. I not good at computer.2. The girl Johns sister.3. This dog fat.4. your brother in the classroom?5. Mike and Liu Tao at school.6. That my red T-shirt.7. This not Linglings pencil.8. Mrs Lin a dancer ten years ago?9. Now Chen Hai an English teacher. 10. Sam, please pass me the
