Question

Who does this book belong to? Start with do you know the

Answer 1

Answer:

The sentence, "Who does this book belong to?" is correct, as long as you are asking a question.

If you want to refer to the owner of the book within a longer sentence, though, then you can use the second option. For example, you could correctly write, "I need to know who this book belongs to."

(It's generally more proper not to end a sentence with a preposition like "to," but everybody does it, especially in speech. So you don't need to worry too much about that. If you are worried or are just curious, though, then technically the more grammatically correct version of that example is, "I need to know to whom this book belongs." But that sounds ridiculous, so no one says it that way, anyway.)

Answer 2

Answer:

to_______does this book belong?