| Simple | Progressive | Perfect | Progressive |
| Present |
| I function |
| you function |
| he/she/it functions |
| we function |
| you all function |
| they function |
|
| I am functioning |
| you are functioning |
| he/she/it is functioning |
| we are functioning |
| you all are functioning |
| they are functioning |
|
| I have functioned |
| you have functioned |
| he/she/it has functioned |
| we have functioned |
| you all have functioned |
| they have functioned |
|
| I have been functioning |
| you have been functioning |
| he/she/it has been functioning |
| we have been functioning |
| you all have been functioning |
| they have been functioning |
|
| Past |
| I functioned |
| you functioned |
| he/she/it functioned |
| we functioned |
| you all functioned |
| they functioned |
|
| I was functioning |
| you were functioning |
| he/she/it was functioning |
| we were functioning |
| you all were functioning |
| they were functioning |
|
| I had functioned |
| you had functioned |
| he/she/it had functioned |
| we had functioned |
| you all had functioned |
| they had functioned |
|
| I had been functioning |
| you had been functioning |
| he/she/it had been functioning |
| we had been functioning |
| you all had been functioning |
| they had been functioning |
|
| Future |
| I will function |
| you will function |
| he/she/it will function |
| we will function |
| you all will function |
| they will function |
|
| I will be functioning |
| you will be functioning |
| he/she/it will be functioning |
| we are functioning |
| you all will be functioning |
| they will be functioning |
|
| I will have functioned |
| you will have functioned |
| he/she/it will have functioned |
| we will have functioned |
| you all will have functioned |
| they will have functioned |
|
| I will have been functioning |
| you will have been functioning |
| he/she/it will have been functioning |
| we will have been functioning |
| you all will have been functioning |
| they will have been functioning |
|
