This book is interesting.
Is this book interesting?
This book is interesting,isn`t it?
Is this book interesting or boring?
What kind of book is this?
My sister goes to school.
Does my sister go to school?
Does my sister or brother go to school?
My sister goes to school,doesn`t she?
Who goes to school?
My friend finished school two years ago.
Did my friend finish school two years ago?
My friend finished school two years ago,didn`t he?
Who finished school two years ago?
Did my friend finish school three or two years ago?