 
  
             | Dictionary form | isogashii 忙しい | ||
|---|---|---|---|
| Stem | isogashi- 忙し- | ||
| Positive | Negative | ||
| is busy | isn't busy | ||
| Present Indicative | Plain | isogashii 忙しい | isogashikunai 忙しくない | 
| Polite | isogashii desu 忙しいです | isogashiku arimasen 忙しくありません | |
| was busy | wasn't busy | ||
| Past Indicative | Plain | isogashikatta 忙しかった | isogashikunakatta 忙しくなかった | 
| Polite | isogashikatta desu 忙しかったです | isogashiku arimasen deshita 忙しくありません でした | |
| will probably be busy | probably won't be busy | ||
| Presumptive | Plain | isogashii darō 忙しい だろう | isogashikunai darō 忙しくない だろう | 
| Polite | isogashii deshō 忙しいでしょう | isogashikunai deshō 忙しくない でしょう | |
| if it were busy | if it were not busy | ||
| Conditional | Plain | isogashikereba 忙しければ | isogashikunakereba 忙しくなければ | 
| Polite | |||