| Simple | Progressive | Perfect | Progressive |
| Present |
| I subchallenge |
| you subchallenge |
| he/she/it subchallenges |
| we subchallenge |
| you all subchallenge |
| they subchallenge |
|
| I am subchallenging |
| you are subchallenging |
| he/she/it is subchallenging |
| we are subchallenging |
| you all are subchallenging |
| they are subchallenging |
|
| I have subchallenged |
| you have subchallenged |
| he/she/it has subchallenged |
| we have subchallenged |
| you all have subchallenged |
| they have subchallenged |
|
| I have been subchallenging |
| you have been subchallenging |
| he/she/it has been subchallenging |
| we have been subchallenging |
| you all have been subchallenging |
| they have been subchallenging |
|
| Past |
| I subchallenged |
| you subchallenged |
| he/she/it subchallenged |
| we subchallenged |
| you all subchallenged |
| they subchallenged |
|
| I was subchallenging |
| you were subchallenging |
| he/she/it was subchallenging |
| we were subchallenging |
| you all were subchallenging |
| they were subchallenging |
|
| I had subchallenged |
| you had subchallenged |
| he/she/it had subchallenged |
| we had subchallenged |
| you all had subchallenged |
| they had subchallenged |
|
| I had been subchallenging |
| you had been subchallenging |
| he/she/it had been subchallenging |
| we had been subchallenging |
| you all had been subchallenging |
| they had been subchallenging |
|
| Future |
| I will subchallenge |
| you will subchallenge |
| he/she/it will subchallenge |
| we will subchallenge |
| you all will subchallenge |
| they will subchallenge |
|
| I will be subchallenging |
| you will be subchallenging |
| he/she/it will be subchallenging |
| we are subchallenging |
| you all will be subchallenging |
| they will be subchallenging |
|
| I will have subchallenged |
| you will have subchallenged |
| he/she/it will have subchallenged |
| we will have subchallenged |
| you all will have subchallenged |
| they will have subchallenged |
|
| I will have been subchallenging |
| you will have been subchallenging |
| he/she/it will have been subchallenging |
| we will have been subchallenging |
| you all will have been subchallenging |
| they will have been subchallenging |
|
