Let’s learn another similar word, which we use for the same function in English as we do in Norwegian:
Norwegian for to be able to is å kunne.
Literally it is to can. You don’t say to can in English but you do in Norwegian. What’s more, this word doesn’t follow the pattern of becoming jeg kunner either, but it follows the same pattern as å ville - vil does. In fact, even more than that, because the Norwegian word for can is just the same as in English: kan.