 
  
             | Dictionary form | marui 丸い | ||
|---|---|---|---|
| Stem | maru- 丸- | ||
| Positive | Negative | ||
| is round | isn't round | ||
| Present Indicative | Plain | marui 丸い | marukunai 丸くない | 
| Polite | marui desu 丸いです | maruku arimasen 丸くありません | |
| was round | wasn't round | ||
| Past Indicative | Plain | marukatta 丸かった | marukunakatta 丸くなかった | 
| Polite | marukatta desu 丸かったです | maruku arimasen deshita 丸くありません でした | |
| will probably be round | probably won't be round | ||
| Presumptive | Plain | marui darō 丸い だろう | marukunai darō 丸くない だろう | 
| Polite | marui deshō 丸いでしょう | marukunai deshō 丸くない でしょう | |
| if it were round | if it were not round | ||
| Conditional | Plain | marukereba 丸ければ | marukunakereba 丸くなければ | 
| Polite | |||