Is it possible for the hymen to be partially broken?

The hymen in most young girls is no more than a very thin membrane of skin that partly covers the vagina entrance so can be broken in many different ways without  any sexual contact, the most common are gymnastics where the legs and pelvis get stretched, riding a bicycle, horse riding or simply just using tampons and a lot of the time it happens without them even realising. A very very small minority of females do have an extra thick hymen that has to be surgically removed before they can put anything in there vagina!

Hope that answers your question.