| Simple | Progressive | Perfect | Progressive |
| Present |
| I billow |
| you billow |
| he/she/it billows |
| we billow |
| you all billow |
| they billow |
|
| I am billowing |
| you are billowing |
| he/she/it is billowing |
| we are billowing |
| you all are billowing |
| they are billowing |
|
| I have billowed |
| you have billowed |
| he/she/it has billowed |
| we have billowed |
| you all have billowed |
| they have billowed |
|
| I have been billowing |
| you have been billowing |
| he/she/it has been billowing |
| we have been billowing |
| you all have been billowing |
| they have been billowing |
|
| Past |
| I billowed |
| you billowed |
| he/she/it billowed |
| we billowed |
| you all billowed |
| they billowed |
|
| I was billowing |
| you were billowing |
| he/she/it was billowing |
| we were billowing |
| you all were billowing |
| they were billowing |
|
| I had billowed |
| you had billowed |
| he/she/it had billowed |
| we had billowed |
| you all had billowed |
| they had billowed |
|
| I had been billowing |
| you had been billowing |
| he/she/it had been billowing |
| we had been billowing |
| you all had been billowing |
| they had been billowing |
|
| Future |
| I will billow |
| you will billow |
| he/she/it will billow |
| we will billow |
| you all will billow |
| they will billow |
|
| I will be billowing |
| you will be billowing |
| he/she/it will be billowing |
| we are billowing |
| you all will be billowing |
| they will be billowing |
|
| I will have billowed |
| you will have billowed |
| he/she/it will have billowed |
| we will have billowed |
| you all will have billowed |
| they will have billowed |
|
| I will have been billowing |
| you will have been billowing |
| he/she/it will have been billowing |
| we will have been billowing |
| you all will have been billowing |
| they will have been billowing |
|
