are these your books?改为单数形式
are these your books?改为单数形式
these are new books.改为单数形式
these are chinese books 改为单数形式
These are English books.改为单数形式
this your friend?(改为复数形式) 问题二Are these your books?(改为单数形式) '
These are your books.(改为单数)
Are these your cousins改为单数形式
These are my English books.改为单数形式
These books are new 怎么改为单数形式急!
Those are your books.改为单数形式要怎么改?
Are these your brothers 怎么改为单数形式?
These are English books .(改为单数句