They areEnglish boys.改为单数形式
They areEnglish boys.改为单数形式
They are English boys.(改为单数形式)
They're American boys.(改为单数)
they are English books.(改为单数形式)
No, they aren't.改为单数形式
They are his friends改为单数形式
They are Chinese【改为单数形式】
They're good policewomen.(改为单数形式)
are they apples?改为单数形式
They have some erasers改为单数形式.
they are your sons改为单数形式
they are nurses改为单数形式