改为单数形式句子these are his pens
Are these his pens改为陈述句
These are his brothers 改为单数句
These are his watch.改为单数句
Are these his pencil cases?改为单数形式 ( )( ) his pencil case?
these are new books.改为单数形式
these are chinese books 改为单数形式
are these apples?改为单数形式
Are these sheep怎么改为单数形式
Are these your cousins改为单数形式
These are English books.改为单数形式
are these your books?改为单数形式
these are apples 改为单数形式