| Simple | Progressive | Perfect | Progressive |
| Present |
| I combust |
| you combust |
| he/she/it combusts |
| we combust |
| you all combust |
| they combust |
|
| I am combusting |
| you are combusting |
| he/she/it is combusting |
| we are combusting |
| you all are combusting |
| they are combusting |
|
| I have combusted |
| you have combusted |
| he/she/it has combusted |
| we have combusted |
| you all have combusted |
| they have combusted |
|
| I have been combusting |
| you have been combusting |
| he/she/it has been combusting |
| we have been combusting |
| you all have been combusting |
| they have been combusting |
|
| Past |
| I combusted |
| you combusted |
| he/she/it combusted |
| we combusted |
| you all combusted |
| they combusted |
|
| I was combusting |
| you were combusting |
| he/she/it was combusting |
| we were combusting |
| you all were combusting |
| they were combusting |
|
| I had combusted |
| you had combusted |
| he/she/it had combusted |
| we had combusted |
| you all had combusted |
| they had combusted |
|
| I had been combusting |
| you had been combusting |
| he/she/it had been combusting |
| we had been combusting |
| you all had been combusting |
| they had been combusting |
|
| Future |
| I will combust |
| you will combust |
| he/she/it will combust |
| we will combust |
| you all will combust |
| they will combust |
|
| I will be combusting |
| you will be combusting |
| he/she/it will be combusting |
| we are combusting |
| you all will be combusting |
| they will be combusting |
|
| I will have combusted |
| you will have combusted |
| he/she/it will have combusted |
| we will have combusted |
| you all will have combusted |
| they will have combusted |
|
| I will have been combusting |
| you will have been combusting |
| he/she/it will have been combusting |
| we will have been combusting |
| you all will have been combusting |
| they will have been combusting |
|
