Answer:
About 500
Explanation:
Here are a list of some of the irregular verbs I know: ir, ser, estar, querer, dormir, preferir, contar, tener, volver, hacer, morir, jugar, buscar, conocer, saber, elegir, conducir, traducir, medir, medir, gobernar, tenir, poder, ponder, traer, venir, vencer, zambullir, mentir, reir, sonreir, decir, clarificar, consentir, dar, cualificar, crecer, costar, confiar, confluir, coger, calentar, valer, tocar...
There is a lot more!!