寝かせる (nekaseru) conjugation
to put to bed, to lay down, to ferment
寝かせる (ねかせる, nekaseru) 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 | 寝かせる nekaseru | 寝かせます nekasemasu | The form you look up. Also the casual present and future. |
| Plain negative | 寝かせない nekasenai | 寝かせません nekasemasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 寝かせた nekaseta | 寝かせました nekasemashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 寝かせなかった nekasenakatta | 寝かせませんでした nekasemasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 寝かせて nekasete | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 寝かせている nekaseteiru | 寝かせています nekaseteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 寝かせたい nekasetai | 寝かせたいです nekasetaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 寝かせよう nekaseyou | 寝かせましょう nekasemashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 寝かせられる nekaserareru | 寝かせられます nekaseraremasu | “can ~”. What you could do; the object often takes が. |
| Passive | 寝かせられる nekaserareru | 寝かせられます nekaseraremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 寝かせさせる nekasesaseru | 寝かせさせます nekasesasemasu | Make or let someone do it. |
| Causative-passive | 寝かせさせられる nekasesaserareru | 寝かせさせられます nekasesaseraremasu | Be made to do it — the long one. |
| Imperative | 寝かせろ nekasero | 寝かせてください nekasetekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 寝かせるな nekaseruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 寝かせれば nekasereba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 寝かせたら nekasetara | — | “if / when ~”. The everyday conditional. |
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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.
