This is a black coat.改为复数句
This is a black coat.改为复数句
把This is a yellow coat改为复数形式
this is a man with black hair (改为复数句)------- ------two------
Is this a bus (改为复数句
this is a pencil改为复数句
This is a shirt .改为复数句
this is a pen.改为复数句
this is a letter改为复数句
this is a tree 改为复数句
This is a pear.改为复数句
This is a dog :改为复数句
this is a watch(改为复数句)