しか〔～しか〕?これしかない

Then you check the second last hiragana: か ka ( 叱る when written out in full hiragana is しかる ) Result: ka does not end with a trailing “e” or “i” sound, therefore 叱る shikaru is Group 1. It’s pretty simple, you just have to remember …

Originally posted here: 
Beginner's Japanese – Chapter I – Verbs - Ramblings of DarkMirage

Tags: check-the-second, does-not, full-hiragana, last-hiragana, past-tense, result, shikaru-becomes, shikaru-means, the-second, しかる