The first Spanish pattern I noticed was between "ser", "estar" and "ir". I only noticed this because those three words were confusing the heck out of me. Fifteen years later, I present to you "The Three Enemigos".
In this video, I'll show you why "ser", "estar" and "ir" are so confusing. You'll hear what Manuel (a native Spanish speaker) had to say about the situation. Then finally, I'll show you the patterns this Gringo found that'll help you keep these three very important verbs straight.