| Simple | Progressive | Perfect | Progressive |
| Present |
| I fathom |
| you fathom |
| he/she/it fathoms |
| we fathom |
| you all fathom |
| they fathom |
|
| I am fathoming |
| you are fathoming |
| he/she/it is fathoming |
| we are fathoming |
| you all are fathoming |
| they are fathoming |
|
| I have fathomed |
| you have fathomed |
| he/she/it has fathomed |
| we have fathomed |
| you all have fathomed |
| they have fathomed |
|
| I have been fathoming |
| you have been fathoming |
| he/she/it has been fathoming |
| we have been fathoming |
| you all have been fathoming |
| they have been fathoming |
|
| Past |
| I fathomed |
| you fathomed |
| he/she/it fathomed |
| we fathomed |
| you all fathomed |
| they fathomed |
|
| I was fathoming |
| you were fathoming |
| he/she/it was fathoming |
| we were fathoming |
| you all were fathoming |
| they were fathoming |
|
| I had fathomed |
| you had fathomed |
| he/she/it had fathomed |
| we had fathomed |
| you all had fathomed |
| they had fathomed |
|
| I had been fathoming |
| you had been fathoming |
| he/she/it had been fathoming |
| we had been fathoming |
| you all had been fathoming |
| they had been fathoming |
|
| Future |
| I will fathom |
| you will fathom |
| he/she/it will fathom |
| we will fathom |
| you all will fathom |
| they will fathom |
|
| I will be fathoming |
| you will be fathoming |
| he/she/it will be fathoming |
| we are fathoming |
| you all will be fathoming |
| they will be fathoming |
|
| I will have fathomed |
| you will have fathomed |
| he/she/it will have fathomed |
| we will have fathomed |
| you all will have fathomed |
| they will have fathomed |
|
| I will have been fathoming |
| you will have been fathoming |
| he/she/it will have been fathoming |
| we will have been fathoming |
| you all will have been fathoming |
| they will have been fathoming |
|
