膨らむ (fukuramu) conjugation
to expand, to swell (out), to become inflated
膨らむ (ふくらむ, fukuramu) 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 | 膨らむ fukuramu | 膨らみます fukuramimasu | The form you look up. Also the casual present and future. |
| Plain negative | 膨らまない fukuramanai | 膨らみません fukuramimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 膨らんだ fukuranda | 膨らみました fukuramimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 膨らまなかった fukuramanakatta | 膨らみませんでした fukuramimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 膨らんで fukurande | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 膨らんでいる fukurandeiru | 膨らんでいます fukurandeimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 膨らみたい fukuramitai | 膨らみたいです fukuramitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 膨らもう fukuramou | 膨らみましょう fukuramimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 膨らめる fukurameru | 膨らめます fukuramemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 膨らまれる fukuramareru | 膨らまれます fukuramaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 膨らませる fukuramaseru | 膨らませます fukuramasemasu | Make or let someone do it. |
| Causative-passive | 膨らまされる fukuramasareru | 膨らまされます fukuramasaremasu | Be made to do it — the long one. |
| Imperative | 膨らめ fukurame | 膨らんでください fukurandekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 膨らむな fukuramuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 膨らめば fukurameba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 膨らんだら fukurandara | — | “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.