| Simple | Progressive | Perfect | Progressive |
| Present |
| I flabbergast |
| you flabbergast |
| he/she/it flabbergasts |
| we flabbergast |
| you all flabbergast |
| they flabbergast |
|
| I am flabbergasting |
| you are flabbergasting |
| he/she/it is flabbergasting |
| we are flabbergasting |
| you all are flabbergasting |
| they are flabbergasting |
|
| I have flabbergasted |
| you have flabbergasted |
| he/she/it has flabbergasted |
| we have flabbergasted |
| you all have flabbergasted |
| they have flabbergasted |
|
| I have been flabbergasting |
| you have been flabbergasting |
| he/she/it has been flabbergasting |
| we have been flabbergasting |
| you all have been flabbergasting |
| they have been flabbergasting |
|
| Past |
| I flabbergasted |
| you flabbergasted |
| he/she/it flabbergasted |
| we flabbergasted |
| you all flabbergasted |
| they flabbergasted |
|
| I was flabbergasting |
| you were flabbergasting |
| he/she/it was flabbergasting |
| we were flabbergasting |
| you all were flabbergasting |
| they were flabbergasting |
|
| I had flabbergasted |
| you had flabbergasted |
| he/she/it had flabbergasted |
| we had flabbergasted |
| you all had flabbergasted |
| they had flabbergasted |
|
| I had been flabbergasting |
| you had been flabbergasting |
| he/she/it had been flabbergasting |
| we had been flabbergasting |
| you all had been flabbergasting |
| they had been flabbergasting |
|
| Future |
| I will flabbergast |
| you will flabbergast |
| he/she/it will flabbergast |
| we will flabbergast |
| you all will flabbergast |
| they will flabbergast |
|
| I will be flabbergasting |
| you will be flabbergasting |
| he/she/it will be flabbergasting |
| we are flabbergasting |
| you all will be flabbergasting |
| they will be flabbergasting |
|
| I will have flabbergasted |
| you will have flabbergasted |
| he/she/it will have flabbergasted |
| we will have flabbergasted |
| you all will have flabbergasted |
| they will have flabbergasted |
|
| I will have been flabbergasting |
| you will have been flabbergasting |
| he/she/it will have been flabbergasting |
| we will have been flabbergasting |
| you all will have been flabbergasting |
| they will have been flabbergasting |
|
