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.
el, ella usted comería
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.