| Simple | Progressive | Perfect | Progressive |
| Present |
| I trepan |
| you trepan |
| he/she/it trepans |
| we trepan |
| you all trepan |
| they trepan |
|
| I am trepanning |
| you are trepanning |
| he/she/it is trepanning |
| we are trepanning |
| you all are trepanning |
| they are trepanning |
|
| I have trepanned |
| you have trepanned |
| he/she/it has trepanned |
| we have trepanned |
| you all have trepanned |
| they have trepanned |
|
| I have been trepanning |
| you have been trepanning |
| he/she/it has been trepanning |
| we have been trepanning |
| you all have been trepanning |
| they have been trepanning |
|
| Past |
| I trepanned |
| you trepanned |
| he/she/it trepanned |
| we trepanned |
| you all trepanned |
| they trepanned |
|
| I was trepanning |
| you were trepanning |
| he/she/it was trepanning |
| we were trepanning |
| you all were trepanning |
| they were trepanning |
|
| I had trepanned |
| you had trepanned |
| he/she/it had trepanned |
| we had trepanned |
| you all had trepanned |
| they had trepanned |
|
| I had been trepanning |
| you had been trepanning |
| he/she/it had been trepanning |
| we had been trepanning |
| you all had been trepanning |
| they had been trepanning |
|
| Future |
| I will trepan |
| you will trepan |
| he/she/it will trepan |
| we will trepan |
| you all will trepan |
| they will trepan |
|
| I will be trepanning |
| you will be trepanning |
| he/she/it will be trepanning |
| we are trepanning |
| you all will be trepanning |
| they will be trepanning |
|
| I will have trepanned |
| you will have trepanned |
| he/she/it will have trepanned |
| we will have trepanned |
| you all will have trepanned |
| they will have trepanned |
|
| I will have been trepanning |
| you will have been trepanning |
| he/she/it will have been trepanning |
| we will have been trepanning |
| you all will have been trepanning |
| they will have been trepanning |
|
