Verb Conjugations

In Japanese, verbs fall in one of two categories: Ichidan verbs and Godan verbs, also known as and verbs.
While beginners usually learn verbs in the form of and , thinking of them as Ichidan and Godan brings some advantages. Most people see the "る-verbs" as the easy ones, and "う-verbs" as the difficult ones, but once you think in the "stem-logic" - at least for me - everything falls into place.

A "stem" is a way to change the end of your verb, so that the sound ends with the sound of the stem. As a Godan example, 飲む (nomu) in the い-stem becomes 飲み (nomi). And because Hiragana doesn't have the letter "m", we shift the む to the "i" version in the "m" row: み.
For Ichidan verbs, this is even easier. In most cases, you just drop the る, and add the conjugation.
For both verb types, the う-stem is the exception, where the verb remains unchanged.

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Verbs by CEFR-J and JLPT Level

File JLPT CEFR-J
~ます (Polite Form) N5 A1.1
~ない (Negative Form) N5 A1.2
~もの (Nominalizer) N5 A1.2
~たい (Desire) N5 A2.1
~こと (Thing Nominalizer) N4 A2.2
~すぎる (Too Much) N4 A2.2
~そう (Looks Like) N4 A2.2
~たことがある (Have ever) N4 A2.2
~に (Purpose) N5 A2.2
~られる (Potential Form) N4 A2.2
~かた (Way of) N4 B1.1
~たら (Conditional Form) N4 B1.1
~られる (Passive Form) N4 B1.1
~前に (Before) N4 B1.1
~ば (Conditional Form) N3 B1.2