| Simple | Progressive | Perfect | Progressive |
| Present |
| I maintain |
| you maintain |
| he/she/it maintains |
| we maintain |
| you all maintain |
| they maintain |
|
| I am maintaining |
| you are maintaining |
| he/she/it is maintaining |
| we are maintaining |
| you all are maintaining |
| they are maintaining |
|
| I have maintained |
| you have maintained |
| he/she/it has maintained |
| we have maintained |
| you all have maintained |
| they have maintained |
|
| I have been maintaining |
| you have been maintaining |
| he/she/it has been maintaining |
| we have been maintaining |
| you all have been maintaining |
| they have been maintaining |
|
| Past |
| I maintained |
| you maintained |
| he/she/it maintained |
| we maintained |
| you all maintained |
| they maintained |
|
| I was maintaining |
| you were maintaining |
| he/she/it was maintaining |
| we were maintaining |
| you all were maintaining |
| they were maintaining |
|
| I had maintained |
| you had maintained |
| he/she/it had maintained |
| we had maintained |
| you all had maintained |
| they had maintained |
|
| I had been maintaining |
| you had been maintaining |
| he/she/it had been maintaining |
| we had been maintaining |
| you all had been maintaining |
| they had been maintaining |
|
| Future |
| I will maintain |
| you will maintain |
| he/she/it will maintain |
| we will maintain |
| you all will maintain |
| they will maintain |
|
| I will be maintaining |
| you will be maintaining |
| he/she/it will be maintaining |
| we are maintaining |
| you all will be maintaining |
| they will be maintaining |
|
| I will have maintained |
| you will have maintained |
| he/she/it will have maintained |
| we will have maintained |
| you all will have maintained |
| they will have maintained |
|
| I will have been maintaining |
| you will have been maintaining |
| he/she/it will have been maintaining |
| we will have been maintaining |
| you all will have been maintaining |
| they will have been maintaining |
|
