愛する (aisuru) conjugation
to love
愛する (あいする, aisuru) is an irregular verb. Only する and 来る are truly irregular, and every learner meets them in week one. 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 | 愛する aisuru | 愛します aishimasu | The form you look up. Also the casual present and future. |
| Plain negative | 愛しない aishinai | 愛しません aishimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 愛した aishita | 愛しました aishimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 愛しなかった aishinakatta | 愛しませんでした aishimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 愛して aishite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 愛している aishiteiru | 愛しています aishiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 愛したい aishitai | 愛したいです aishitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 愛しよう aishiyou | 愛しましょう aishimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 愛できる aidekiru | 愛できます aidekimasu | “can ~”. What you could do; the object often takes が. |
| Passive | 愛される aisareru | 愛されます aisaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 愛させる aisaseru | 愛させます aisasemasu | Make or let someone do it. |
| Causative-passive | 愛させられる aisaserareru | 愛させられます aisaseraremasu | Be made to do it — the long one. |
| Imperative | 愛しろ aishiro | 愛してください aishitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 愛するな aisuruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 愛すれば aisureba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 愛したら aishitara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Only する and 来る are truly irregular, and every learner meets them in week one.
See the full rules on the verb conjugation guide.