流す (nagasu) conjugation
to drain, to float, to shed (e.g., blood, tears)
流す (ながす, nagasu) is a godan verb. Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば. 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 | 流す nagasu | 流します nagashimasu | The form you look up. Also the casual present and future. |
| Plain negative | 流さない nagasanai | 流しません nagashimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 流した nagashita | 流しました nagashimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 流さなかった nagasanakatta | 流しませんでした nagashimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 流して nagashite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 流している nagashiteiru | 流しています nagashiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 流したい nagashitai | 流したいです nagashitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 流そう nagasou | 流しましょう nagashimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 流せる nagaseru | 流せます nagasemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 流される nagasareru | 流されます nagasaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 流させる nagasaseru | 流させます nagasasemasu | Make or let someone do it. |
| Causative-passive | 流させられる nagasaserareru | 流させられます nagasaseraremasu | Be made to do it — the long one. |
| Imperative | 流せ nagase | 流してください nagashitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 流すな nagasuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 流せば nagaseba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 流したら nagashitara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば.
See the full rules on the verb conjugation guide.