| singular | plural |
| Infinitive | | |
| maintain | |
| present simple | | |
| 1 | I maintain | we maintain |
| 2 | you maintain | you maintain |
| 3 | he/she/it maintains | they maintain |
| past simple | | |
| 1 | I maintained | we maintained |
| 2 | you maintained | you maintained |
| 3 | he/she/it maintained | they maintained |
| future simple | | |
| 1 | I will/shall maintain | we will/shall maintain |
| 2 | you will/shall maintain | you will/shall maintain |
| 3 | he/she/it will/shall maintain | they will/shall maintain |
| conditional simple | | |
| 1 | I would maintain | we would maintain |
| 2 | you would maintain | you would maintain |
| 3 | he/she/it would maintain | they would maintain |
| present continuous | | |
| 1 | I am maintaining | we are maintaining |
| 2 | you are maintaining | you are maintaining |
| 3 | he/she/it is maintaining | they are maintaining |
| past continuous | | |
| 1 | I was maintaining | we were maintaining |
| 2 | you were maintaining | you were maintaining |
| 3 | he/she/it was maintaining | they were maintaining |
| future continuous | | |
| 1 | I will be maintaining | we will be maintaining |
| 2 | you will be maintaining | you will be maintaining |
| 3 | he/she/it will be maintaining | they will be maintaining |
| conditional continuous | | |
| 1 | I would be maintaining | we would be maintaining |
| 2 | you would be maintaining | you would be maintaining |
| 3 | he/she/it would be maintaining | they would be maintaining |
| present perfect | | |
| 1 | I have maintained | we have maintained |
| 2 | you have maintained | you have maintained |
| 3 | he/she/it has maintained | they have maintained |
| past perfect | | |
| 1 | I had maintained | we had maintained |
| 2 | you had maintained | you had maintained |
| 3 | he/she/it had maintained | they had maintained |
| future perfect | | |
| 1 | I will have maintained | we will have maintained |
| 2 | you will have maintained | you will have maintained |
| 3 | he/she/it will have maintained | they will have maintained |
| conditional perfect | | |
| 1 | I would have maintained | we would have maintained |
| 2 | you would have maintained | you would have maintained |
| 3 | he/she/it would have maintained | they would have maintained |
