this is a cat变复数是these is.还是they is.
this is a cat变复数是these is.还是they is.
Is it a cat?要求变复数
This is a cat.(改为复数形式)
this is a new car.变复数
this is a piano怎么变复数
This is a knife.怎样变复数.
This is a marker.(变复数)
This is a tomato变复数形式是?
This is a black cat.(改成复数形式)
this is a beautiful cat 改成复数形式
为什么this is a XXX改复数,有时改成these are 有时又改成they are?
she is a teacher.变复数 it is a pen.变复数 this is my