疑う（うたがう）Conjugation
JLPT N3 · Godan verb (Group 1) · Meaning: to doubt / suspect
Full conjugation table
| Form | Japanese | Reading |
|---|---|---|
| Dictionary form The base form — casual speech and the stem for many grammar patterns. | 疑う | うたがう |
| masu (polite present) Polite present/future affirmative. | 疑います | うたがいます |
| masen (polite negative) Polite present negative. | 疑いません | うたがいません |
| mashita (polite past) Polite past affirmative. | 疑いました | うたがいました |
| masen deshita (polite past neg.) Polite past negative. | 疑いませんでした | うたがいませんでした |
| te-form The most versatile form — linking, requests, progressive and more. | 疑って | うたがって |
| ta (plain past) Plain past affirmative. | 疑った | うたがった |
| nai (plain negative) Plain present negative. | 疑わない | うたがわない |
| nakatta (plain past neg.) Plain past negative. | 疑わなかった | うたがわなかった |
| Potential Ability or possibility — 'can do'. | 疑える | うたがえる |
| Passive Passive voice — 'to be done to'. | 疑われる | うたがわれる |
| Causative Causative — 'to make/let someone do'. | 疑わせる | うたがわせる |
| Volitional Volitional — 'let's…' or intention. | 疑おう | うたがおう |
| Imperative Imperative — a strong command; used sparingly. | 疑え | うたがえ |
| Prohibitive Prohibitive — 'don't do it!'. | 疑うな | うたがうな |
| Conditional (ba) Hypothetical 'if' — leans written. | 疑えば | うたがえば |
| Conditional (tara) The most versatile everyday 'if / when'. | 疑ったら | うたがったら |
Example sentences
- 彼の話を少し疑ってしまう。 — I can't help but doubt his story a little.
- 自分の目を疑うほど驚いた。 — I was so surprised I could hardly believe my eyes.