| Simple | Progressive | Perfect | Progressive |
| Present |
| I modify |
| you modify |
| he/she/it modifies |
| we modify |
| you all modify |
| they modify |
|
| I am modifying |
| you are modifying |
| he/she/it is modifying |
| we are modifying |
| you all are modifying |
| they are modifying |
|
| I have modified |
| you have modified |
| he/she/it has modified |
| we have modified |
| you all have modified |
| they have modified |
|
| I have been modifying |
| you have been modifying |
| he/she/it has been modifying |
| we have been modifying |
| you all have been modifying |
| they have been modifying |
|
| Past |
| I modified |
| you modified |
| he/she/it modified |
| we modified |
| you all modified |
| they modified |
|
| I was modifying |
| you were modifying |
| he/she/it was modifying |
| we were modifying |
| you all were modifying |
| they were modifying |
|
| I had modified |
| you had modified |
| he/she/it had modified |
| we had modified |
| you all had modified |
| they had modified |
|
| I had been modifying |
| you had been modifying |
| he/she/it had been modifying |
| we had been modifying |
| you all had been modifying |
| they had been modifying |
|
| Future |
| I will modify |
| you will modify |
| he/she/it will modify |
| we will modify |
| you all will modify |
| they will modify |
|
| I will be modifying |
| you will be modifying |
| he/she/it will be modifying |
| we are modifying |
| you all will be modifying |
| they will be modifying |
|
| I will have modified |
| you will have modified |
| he/she/it will have modified |
| we will have modified |
| you all will have modified |
| they will have modified |
|
| I will have been modifying |
| you will have been modifying |
| he/she/it will have been modifying |
| we will have been modifying |
| you all will have been modifying |
| they will have been modifying |
|
