To ask a classmate to borrow a book in Engpsh, you can say:
"Hey, do you happen to have a copy of [book title] that I could borrow? I need it for my assignment."
Alternatively, you could say:
"Hi, I'm looking for a copy of [book title] and I was wondering if you have one I could borrow. I'm working on a project and I really need it."
Either way, it's a good idea to be popte and specific when asking to borrow a book. Be sure to also offer to return the book when you're done with it.