"To season the food, silly!"
"πρόσθεσες" is from "Προσθέτω", is an irregular past ?
No, that's regulal, I think.
why "τ" from "Προσθέτω" becomes "σ" in past ?
what troll meant was that, since consonants change according to rule in the past, it's regular. τ becomes σ as a rule. These aorist consonant changes are given in "tips & hints" for "past 1"
Thanks for your answer. But "τ" becomes "σ" is not given in tips for past 1.