: Lesson 30’s ~てある is the static precursor to passive sentences in Lesson 41 (e.g., ドアが開けてある vs ドアが開けられた).

through several online repositories. These documents typically include vocabulary lists, sentence pattern translations, and detailed grammar notes for each lesson. Direct PDF Links & Resources Internet Archive : You can view or download the full Minna no Nihongo II Translation and Grammar Notes

But one of the most common search queries among self-learners is a frustrating one: "Where can I find a reliable PDF grammar link for Lessons 26–50?"