level2 (N4)Transitive vs. Intransitive Verb Pairs in Japanese (有対動詞) + 〜ている
Learn Japanese verb pairs (transitive/intransitive: 有対動詞) and how 〜ている changes meaning: action-in-progress vs. result state. With core pairs (開ける/開く, 閉める/閉まる, つける/つく, 消す/消える…), examples, drills, and common mistakes for N4 beginners.
