Is this your book ? 变为复数句
Is this your book ? 变为复数句
This book is very interesting(变为复数句)
Is this your book?单复数句互变
this is a bus.【变为复数句】
What is this?变为复数句___________________________.
This is my sister(变为复数句)
where is your friend 变为复数句
Is this a book?的复数句
Is it your book?复数句
here is your book.的复数句
Is it teacher's book?变为复数句
is this your book?的同义句