| Simple | Progressive | Perfect | Progressive |
| Present |
| I darken |
| you darken |
| he/she/it darkens |
| we darken |
| you all darken |
| they darken |
|
| I am darkening |
| you are darkening |
| he/she/it is darkening |
| we are darkening |
| you all are darkening |
| they are darkening |
|
| I have darkened |
| you have darkened |
| he/she/it has darkened |
| we have darkened |
| you all have darkened |
| they have darkened |
|
| I have been darkening |
| you have been darkening |
| he/she/it has been darkening |
| we have been darkening |
| you all have been darkening |
| they have been darkening |
|
| Past |
| I darkened |
| you darkened |
| he/she/it darkened |
| we darkened |
| you all darkened |
| they darkened |
|
| I was darkening |
| you were darkening |
| he/she/it was darkening |
| we were darkening |
| you all were darkening |
| they were darkening |
|
| I had darkened |
| you had darkened |
| he/she/it had darkened |
| we had darkened |
| you all had darkened |
| they had darkened |
|
| I had been darkening |
| you had been darkening |
| he/she/it had been darkening |
| we had been darkening |
| you all had been darkening |
| they had been darkening |
|
| Future |
| I will darken |
| you will darken |
| he/she/it will darken |
| we will darken |
| you all will darken |
| they will darken |
|
| I will be darkening |
| you will be darkening |
| he/she/it will be darkening |
| we are darkening |
| you all will be darkening |
| they will be darkening |
|
| I will have darkened |
| you will have darkened |
| he/she/it will have darkened |
| we will have darkened |
| you all will have darkened |
| they will have darkened |
|
| I will have been darkening |
| you will have been darkening |
| he/she/it will have been darkening |
| we will have been darkening |
| you all will have been darkening |
| they will have been darkening |
|
