Why is Lee's cat catching the mice?和Why isn't Lee's cat catching the mice?有啥区别?
问题描述：
Why is Lee's cat catching the mice?和Why isn't Lee's cat catching the mice?有啥区别?
怎么理解这两句,我只学过is lee's这种情况,即没加否定的
答
为什么李的猫在捉老鼠
为什么李的猫没有在捉老鼠