 
  
             | Dictionary form | usui 薄い | ||
|---|---|---|---|
| Stem | usu- 薄- | ||
| Positive | Negative | ||
| is thin | isn't thin | ||
| Present Indicative | Plain | usui 薄い | usukunai 薄くない | 
| Polite | usui desu 薄いです | usuku arimasen 薄くありません | |
| was thin | wasn't thin | ||
| Past Indicative | Plain | usukatta 薄かった | usukunakatta 薄くなかった | 
| Polite | usukatta desu 薄かったです | usuku arimasen deshita 薄くありません でした | |
| will probably be thin | probably won't be thin | ||
| Presumptive | Plain | usui darō 薄い だろう | usukunai darō 薄くない だろう | 
| Polite | usui deshō 薄いでしょう | usukunai deshō 薄くない でしょう | |
| if it were thin | if it were not thin | ||
| Conditional | Plain | usukereba 薄ければ | usukunakereba 薄くなければ | 
| Polite | |||