| Simple | Progressive | Perfect | Progressive |
| Present |
| I stumble |
| you stumble |
| he/she/it stumbles |
| we stumble |
| you all stumble |
| they stumble |
|
| I am stumbling |
| you are stumbling |
| he/she/it is stumbling |
| we are stumbling |
| you all are stumbling |
| they are stumbling |
|
| I have stumbled |
| you have stumbled |
| he/she/it has stumbled |
| we have stumbled |
| you all have stumbled |
| they have stumbled |
|
| I have been stumbling |
| you have been stumbling |
| he/she/it has been stumbling |
| we have been stumbling |
| you all have been stumbling |
| they have been stumbling |
|
| Past |
| I stumbled |
| you stumbled |
| he/she/it stumbled |
| we stumbled |
| you all stumbled |
| they stumbled |
|
| I was stumbling |
| you were stumbling |
| he/she/it was stumbling |
| we were stumbling |
| you all were stumbling |
| they were stumbling |
|
| I had stumbled |
| you had stumbled |
| he/she/it had stumbled |
| we had stumbled |
| you all had stumbled |
| they had stumbled |
|
| I had been stumbling |
| you had been stumbling |
| he/she/it had been stumbling |
| we had been stumbling |
| you all had been stumbling |
| they had been stumbling |
|
| Future |
| I will stumble |
| you will stumble |
| he/she/it will stumble |
| we will stumble |
| you all will stumble |
| they will stumble |
|
| I will be stumbling |
| you will be stumbling |
| he/she/it will be stumbling |
| we are stumbling |
| you all will be stumbling |
| they will be stumbling |
|
| I will have stumbled |
| you will have stumbled |
| he/she/it will have stumbled |
| we will have stumbled |
| you all will have stumbled |
| they will have stumbled |
|
| I will have been stumbling |
| you will have been stumbling |
| he/she/it will have been stumbling |
| we will have been stumbling |
| you all will have been stumbling |
| they will have been stumbling |
|
