1肯定句改否定句的方法1. be动词后not如：is not=isn t, are not=aren t,am not=am not（没有缩写形式）2. 在情态动词can，should， will等后加not如：cannot, should not,will not；3. 无be动词无情态动词，在实意动词前加助动词否定形式don t/doesn t/didn t注意：助动词后，动词要用原形4. some 改成any如：Are there any books in your bag?肯定句改成否定句如：I am a girl. I am not a girl.You are a student.You are not a student.You arent a student.This is Toms bag. This is not Toms bag. This isnt Toms bag.2肯定句改一般疑问句的方法1. 把be动词放在句首，剩下的照抄2. 把情态动词can，shall， w
