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Verb inflections
| Form | Affirmative | Negative |
|---|---|---|
| Present | 疑問に思う | 疑問に思わない |
| Polite | 疑問に思います | 疑問に思いません |
| Past | 疑問に思った | 疑問に思わなかった |
| Polite + Past | 疑問に思いました | 疑問に思いませんでした |
| Te-form | 疑問に思って | 疑問に思わなくて |
| Potential | 疑問に思える | 疑問に思えない |
| Passive | 疑問に思われる | 疑問に思われない |
| Causative | 疑問に思わせる | 疑問に思わせない |
| Causative + Passive | 疑問に思わされる | 疑問に思わされない |
| Imperative | 疑問に思え | 疑問に思うな |
Example
誰もが彼の成功を疑問に思った。
Everyone doubted his success.
Usage Notes
Used when something seems suspicious or hard to believe. It expresses a sense of skepticism.
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