| I | whiten | 
|---|---|
| you | whiten | 
| he/she/it | whitens | 
| we | whiten | 
| you | whiten | 
| they | whiten | 
| I | whitened | 
|---|---|
| you | whitened | 
| he/she/it | whitened | 
| we | whitened | 
| you | whitened | 
| they | whitened | 
| I | have | whitened | 
|---|---|---|
| you | have | whitened | 
| he/she/it | has | whitened | 
| we | have | whitened | 
| you | have | whitened | 
| they | have | whitened | 
| I | had | whitened | 
|---|---|---|
| you | had | whitened | 
| he/she/it | had | whitened | 
| we | had | whitened | 
| you | had | whitened | 
| they | had | whitened | 
