That’s a great question! The most common verbs are all irregular: be, get, have, eat, drink, come, go, etc. The modal verbs are irregular (and defective, i.e., they lack certain forms). On the other hand, there are dozens of irregular verbs that are uncommon these days, for example, "to forsake." I’d recommend that you use the irregular verb list included in whatever textbook you’re working on. If you don’t have a textbook, find a short list (say 30 to 50 verbs) to begin with, and then work your way up to longer lists of 70 or 80 verbs. There are probably well over a hundred in all, but the less common ones definitely won’t be worth the trouble until you’ve reached an advanced level of English.

English is the same as Spanish on this point. The verbs that are used the most frequently will be the ones that are the most irregular.

Excellent, thank you for your help. I'm going to include some exercise to practice Irregular verbs. :) (y)

Irregular verbs are very common in English. You must learn them at the same time as you learn other verbs, unfortunately. Some of the most important verbs are irregular, for example: to be, to have, to go.