Are they your friends?怎么变单数
They are our friends变单数句
英语把Are your friends tourists too?Yes,they are.怎样变单数
are they your gongd friends 改为单数或复数形式.怎么改?
These are my friends .变单数
They are his friends改为单数形式
They are my friends.改为单数句
they are my friends改单数句
they are good friends 改单数句
Are those your friends?(改为单数句)
they are an English book变单数
Are you tourists?变单数怎么变.
they are your sons改为单数形式