| Simple | Progressive | Perfect | Progressive |
| Present |
| I undercharge |
| you undercharge |
| he/she/it undercharges |
| we undercharge |
| you all undercharge |
| they undercharge |
|
| I am undercharging |
| you are undercharging |
| he/she/it is undercharging |
| we are undercharging |
| you all are undercharging |
| they are undercharging |
|
| I have undercharged |
| you have undercharged |
| he/she/it has undercharged |
| we have undercharged |
| you all have undercharged |
| they have undercharged |
|
| I have been undercharging |
| you have been undercharging |
| he/she/it has been undercharging |
| we have been undercharging |
| you all have been undercharging |
| they have been undercharging |
|
| Past |
| I undercharged |
| you undercharged |
| he/she/it undercharged |
| we undercharged |
| you all undercharged |
| they undercharged |
|
| I was undercharging |
| you were undercharging |
| he/she/it was undercharging |
| we were undercharging |
| you all were undercharging |
| they were undercharging |
|
| I had undercharged |
| you had undercharged |
| he/she/it had undercharged |
| we had undercharged |
| you all had undercharged |
| they had undercharged |
|
| I had been undercharging |
| you had been undercharging |
| he/she/it had been undercharging |
| we had been undercharging |
| you all had been undercharging |
| they had been undercharging |
|
| Future |
| I will undercharge |
| you will undercharge |
| he/she/it will undercharge |
| we will undercharge |
| you all will undercharge |
| they will undercharge |
|
| I will be undercharging |
| you will be undercharging |
| he/she/it will be undercharging |
| we are undercharging |
| you all will be undercharging |
| they will be undercharging |
|
| I will have undercharged |
| you will have undercharged |
| he/she/it will have undercharged |
| we will have undercharged |
| you all will have undercharged |
| they will have undercharged |
|
| I will have been undercharging |
| you will have been undercharging |
| he/she/it will have been undercharging |
| we will have been undercharging |
| you all will have been undercharging |
| they will have been undercharging |
|
