Look Debas,.. actually there're a lot of tenses in spanish, serveral of they don't use it more,.. therefore I think that it could be very helpful to know the fundamentals, you can guess, all tenses which belong to the indicative tense (modo indicativo) are nearly the followings; present (presente simple, verbos regulares), the past (pretérito perfecto, preterito imperfecto, pretérito perfecto simple), the future (futuro simple, futuro perfecto), and the conditionals (condicional simple, condicional perfecto). Well,... you know, there're more, include in the indicative tense, but I guess that if you wanna keep a converation in spanish, you maybe need to learn that,...Greetings, and sorry for my english,..I hope that it could be understandble...