Free Forever
Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.
| Form | Affirmative | Negative |
|---|---|---|
| Present | 折りたたむ | 折りたたまない |
| Polite | 折りたたみます | 折りたたみません |
| Past | 折りたたんだ | 折りたたまなかった |
| Polite + Past | 折りたたみました | 折りたたみませんでした |
| Te-form | 折りたたんで | 折りたたまなくて |
| Potential | 折りたためる | 折りたためない |
| Passive | 折りたたまれる | 折りたたまれない |
| Causative | 折りたたませる | 折りたたませない |
| Causative + Passive | 折りたたまされる | 折りたたまされない |
| Imperative | 折りたため | 折りたたむな |
Sottaku
Sottaku is an app for learning a growing range of Asian and European languages with a strong focus on SRS. It includes automatic flashcard creation for hundreds of thousands of words, grammar breakdowns in example sentences, language-specific study packs where available, adaptive quizzes, mobile apps, a browser extension, and community features. Give it a try now! All learning content is free with no limits on flashcards or study time.
Sottaku is built to match the habits of successful learners. By using Sottaku, you will naturally learn in the most efficient way possible, as proven by countless success stories in the language learning community.
Free Forever
Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.
Smart SRS System
Our flashcard system uses the FSRS algorithm (also used in Anki) to optimize your review schedule and maximize retention.
Comprehensive Content
From hanzi, kana, hangul, and European vocabulary basics to grammar and reading practice where available, we have lessons for every level. Practice with quizzes tailored to your skill.
Community Chat
Ask level-appropriate questions and get help from the community. Learn together with fellow learners across every supported language.