Grammar by JLPT level
Grammar grouped by what it gets confused with, not by the alphabet. 問題7 never asks what a pattern means on its own — it asks which of four near-identical ones fits, so the ones you mix up belong on the same page.
N5 Grammar
BeginnerUnderstands some basic Japanese.
N4 Grammar
ElementaryUnderstands basic Japanese.
N3 Grammar
IntermediateUnderstands everyday Japanese to a certain degree.
N2 Grammar
Pre-advancedUnderstands everyday Japanese plus a wider range of topics.
N1 Grammar
AdvancedUnderstands Japanese in a broad range of circumstances.
Not sure which level you are? The level guide sets out what each exam covers, how long it runs and what it takes to pass.