Calling all spanish speakers! easy ten points!?

I don't think there is enough space to answer all that in a yahoo question lol. You should google it or something, too many irregulars and special rules for certain verbs to list here. For example not all regular preterite conjugations are completely regular, have to watch out for verbs ending in -car, -gar, and -zar as some forms change the stem a little to maintain the correct sound.