決める (kimeru) conjugation
to decide (v.t.)
決める (きめる, kimeru) is an ichidan verb. Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes. Every form below is tappable — hear it, then say it back.
Conjugation table
| Form | Plain (casual) | Polite (~ます) | When you use it |
|---|---|---|---|
| Dictionary / plain | 決める kimeru | 決めます kimemasu | The form you look up. Also the casual present and future. |
| Plain negative | 決めない kimenai | 決めません kimemasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 決めた kimeta | 決めました kimemashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 決めなかった kimenakatta | 決めませんでした kimemasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 決めて kimete | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 決めている kimeteiru | 決めています kimeteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 決めたい kimetai | 決めたいです kimetaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 決めよう kimeyou | 決めましょう kimemashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 決められる kimerareru | 決められます kimeraremasu | “can ~”. What you could do; the object often takes が. |
| Passive | 決められる kimerareru | 決められます kimeraremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 決めさせる kimesaseru | 決めさせます kimesasemasu | Make or let someone do it. |
| Causative-passive | 決めさせられる kimesaserareru | 決めさせられます kimesaseraremasu | Be made to do it — the long one. |
| Imperative | 決めろ kimero | 決めてください kimetekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 決めるな kimeruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 決めれば kimereba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 決めたら kimetara | — | “if / when ~”. The everyday conditional. |
🔊 Tap any Japanese word to hear it spoken.
Why it conjugates this way
Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes.
See the full rules on the verb conjugation guide.