| Simple | Progressive | Perfect | Progressive |
| Present |
| I mumble |
| you mumble |
| he/she/it mumbles |
| we mumble |
| you all mumble |
| they mumble |
|
| I am mumbling |
| you are mumbling |
| he/she/it is mumbling |
| we are mumbling |
| you all are mumbling |
| they are mumbling |
|
| I have mumbled |
| you have mumbled |
| he/she/it has mumbled |
| we have mumbled |
| you all have mumbled |
| they have mumbled |
|
| I have been mumbling |
| you have been mumbling |
| he/she/it has been mumbling |
| we have been mumbling |
| you all have been mumbling |
| they have been mumbling |
|
| Past |
| I mumbled |
| you mumbled |
| he/she/it mumbled |
| we mumbled |
| you all mumbled |
| they mumbled |
|
| I was mumbling |
| you were mumbling |
| he/she/it was mumbling |
| we were mumbling |
| you all were mumbling |
| they were mumbling |
|
| I had mumbled |
| you had mumbled |
| he/she/it had mumbled |
| we had mumbled |
| you all had mumbled |
| they had mumbled |
|
| I had been mumbling |
| you had been mumbling |
| he/she/it had been mumbling |
| we had been mumbling |
| you all had been mumbling |
| they had been mumbling |
|
| Future |
| I will mumble |
| you will mumble |
| he/she/it will mumble |
| we will mumble |
| you all will mumble |
| they will mumble |
|
| I will be mumbling |
| you will be mumbling |
| he/she/it will be mumbling |
| we are mumbling |
| you all will be mumbling |
| they will be mumbling |
|
| I will have mumbled |
| you will have mumbled |
| he/she/it will have mumbled |
| we will have mumbled |
| you all will have mumbled |
| they will have mumbled |
|
| I will have been mumbling |
| you will have been mumbling |
| he/she/it will have been mumbling |
| we will have been mumbling |
| you all will have been mumbling |
| they will have been mumbling |
|
