| Simple | Progressive | Perfect | Progressive |
| Present |
| I duplicate |
| you duplicate |
| he/she/it duplicates |
| we duplicate |
| you all duplicate |
| they duplicate |
|
| I am duplicating |
| you are duplicating |
| he/she/it is duplicating |
| we are duplicating |
| you all are duplicating |
| they are duplicating |
|
| I have duplicated |
| you have duplicated |
| he/she/it has duplicated |
| we have duplicated |
| you all have duplicated |
| they have duplicated |
|
| I have been duplicating |
| you have been duplicating |
| he/she/it has been duplicating |
| we have been duplicating |
| you all have been duplicating |
| they have been duplicating |
|
| Past |
| I duplicated |
| you duplicated |
| he/she/it duplicated |
| we duplicated |
| you all duplicated |
| they duplicated |
|
| I was duplicating |
| you were duplicating |
| he/she/it was duplicating |
| we were duplicating |
| you all were duplicating |
| they were duplicating |
|
| I had duplicated |
| you had duplicated |
| he/she/it had duplicated |
| we had duplicated |
| you all had duplicated |
| they had duplicated |
|
| I had been duplicating |
| you had been duplicating |
| he/she/it had been duplicating |
| we had been duplicating |
| you all had been duplicating |
| they had been duplicating |
|
| Future |
| I will duplicate |
| you will duplicate |
| he/she/it will duplicate |
| we will duplicate |
| you all will duplicate |
| they will duplicate |
|
| I will be duplicating |
| you will be duplicating |
| he/she/it will be duplicating |
| we are duplicating |
| you all will be duplicating |
| they will be duplicating |
|
| I will have duplicated |
| you will have duplicated |
| he/she/it will have duplicated |
| we will have duplicated |
| you all will have duplicated |
| they will have duplicated |
|
| I will have been duplicating |
| you will have been duplicating |
| he/she/it will have been duplicating |
| we will have been duplicating |
| you all will have been duplicating |
| they will have been duplicating |
|
