lets looks at Comer... (To eat) in english.
if i want to say I WOULD EAT i would obviously say (yo comería)
lets see what that looks like with all subjects.
yo comería
tu comerías
el, ella usted comería
etc...
if youll notice a pattern, to speak like (i WOULD eat) you will use the whole verb (comer) and add on (ia, ias, ia, iamos, ian) etc...
and if your really smart youll figure out that these (ia, ias, ias, etc...) are simply the word (would) in english.