There are two ways to form yes/no questions in Mandarin, and both of them are pretty different from how things work in English.
The first way is to add the question particle 吗. This effectively turns a sentence into a question as follows:
|I like that restaurant. Do they like that restaurant?
The second way is to essentially ask verb-not-verb
|Is this a restaurant?
Remember, we negate 有 with 没 like so:
|Do you have my book?