| Simple | Progressive | Perfect | Progressive |
| Present |
| I grumble |
| you grumble |
| he/she/it grumbles |
| we grumble |
| you all grumble |
| they grumble |
|
| I am grumbling |
| you are grumbling |
| he/she/it is grumbling |
| we are grumbling |
| you all are grumbling |
| they are grumbling |
|
| I have grumbled |
| you have grumbled |
| he/she/it has grumbled |
| we have grumbled |
| you all have grumbled |
| they have grumbled |
|
| I have been grumbling |
| you have been grumbling |
| he/she/it has been grumbling |
| we have been grumbling |
| you all have been grumbling |
| they have been grumbling |
|
| Past |
| I grumbled |
| you grumbled |
| he/she/it grumbled |
| we grumbled |
| you all grumbled |
| they grumbled |
|
| I was grumbling |
| you were grumbling |
| he/she/it was grumbling |
| we were grumbling |
| you all were grumbling |
| they were grumbling |
|
| I had grumbled |
| you had grumbled |
| he/she/it had grumbled |
| we had grumbled |
| you all had grumbled |
| they had grumbled |
|
| I had been grumbling |
| you had been grumbling |
| he/she/it had been grumbling |
| we had been grumbling |
| you all had been grumbling |
| they had been grumbling |
|
| Future |
| I will grumble |
| you will grumble |
| he/she/it will grumble |
| we will grumble |
| you all will grumble |
| they will grumble |
|
| I will be grumbling |
| you will be grumbling |
| he/she/it will be grumbling |
| we are grumbling |
| you all will be grumbling |
| they will be grumbling |
|
| I will have grumbled |
| you will have grumbled |
| he/she/it will have grumbled |
| we will have grumbled |
| you all will have grumbled |
| they will have grumbled |
|
| I will have been grumbling |
| you will have been grumbling |
| he/she/it will have been grumbling |
| we will have been grumbling |
| you all will have been grumbling |
| they will have been grumbling |
|
