Introduction

Japanese verbs are typically catagorised as one of three groups. Though it seems rather odd, I'll go through them backwards, but you'll see why soon.

Group 3

来る, kuru

する, suru

These are the only irregular verbs in Japanese. 行く is irregular in the past and ~te form and so are some other verbs, but they'll be covered when they need to be. Suru and kuru are the only verbs that are completely irregular in every conjugation.

Group 2

Ichidan-doushi

These verbs are most of the verbs ending in ~いる or ~える. However, some ending in ~いる or ~える are in fact Group 1 Godan-doushi verbs. Group 2 is the easiest group to conjugate as it only has one stem.

Group 1

Godan-doushi

This group is made up of every other verb, including the verbs ending in ~いる or ~える but do not belong to group 2.

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Japanese verbs can only end in:

す

く

ぐ

る

つ

う

ぶ

む.

ぬ only has one verbs belonging to it, 死ぬ (shinu) which means to die.