Free Forever
Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.
| Form | Inflected form |
|---|---|
| Base | 투덜대다 |
| Present | 투덜댄다 |
| Polite | 투덜대요 |
| Formal | 투덜댑니다 |
| Past | 투덜댔다 |
| Past + Polite | 투덜댔어요 |
| Guess + Polite | 투덜대겠어요 |
| Connective | 투덜대고 |
| Conditional | 투덜대면 |
| Volitional | 투덜대자 |
| Imperative | 투덜대라 |
| Imperative + Polite | 투덜대세요 |
| Attributive | 투덜대는 / 투덜댄 / 투덜댈 |
Sottaku
Sottaku is an app for learning Chinese, Japanese, Korean, English, Spanish, French, German, and Italian 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 all 8 supported languages.