| I | undercharge | 
|---|---|
| you | undercharge | 
| he/she/it | undercharges | 
| we | undercharge | 
| you | undercharge | 
| they | undercharge | 
| I | undercharged | 
|---|---|
| you | undercharged | 
| he/she/it | undercharged | 
| we | undercharged | 
| you | undercharged | 
| they | undercharged | 
| I | have | undercharged | 
|---|---|---|
| you | have | undercharged | 
| he/she/it | has | undercharged | 
| we | have | undercharged | 
| you | have | undercharged | 
| they | have | undercharged | 
| I | had | undercharged | 
|---|---|---|
| you | had | undercharged | 
| he/she/it | had | undercharged | 
| we | had | undercharged | 
| you | had | undercharged | 
| they | had | undercharged | 
