practice-japanese.com/grammar/jlpt-n4-grammar/
Complete reference for JLPT N4 grammar patterns with explanations and example sentences covering verb forms, particles, conditionals, and functional expressions.
GrammarJLPT and other testsJLPT N4Sentence patternsVerb conjugationParticlesPassive and causativeJLPTIntermediateConditionalsListening practiceJLPT N5JLPT N3