Have a look here. There is some discussion of the historical reasons that some verbs are irregular, and also some discussion of how some verbs have similar patterns of irregularity.
No, not that but I never knew that language is changing. I thought English was a set language with a set of rules for grammar and all I had to do was to learn and memorize it all!
I don't mind if you correct and teach me as much as possible.
Yes, so when I say I've broken my ankle that means I broke my ankle and it's still broken, right? Where if I said I broke my ankle that would mean something that happened in the past.