| CHALLENGE - PRESENT SIMPLE | |
| ★ i | challenge |
| ★ you | challenge |
| ★ he/she/it | challenges |
| ★ we | challenge |
| ★ you | challenge |
| ★ they | challenge |
| CHALLENGE - PRESENT CONTINUOUS | |
| ★ i am | challenging |
| ★ you are | challenging |
| ★ he/she/it is | challenging |
| ★ we are | challenging |
| ★you are | challenging |
| ★ they are | challenging |
| CHALLENGE - PRESENT PERFECT | |
| ★ i have | challenged |
| ★ you have | challenged |
| ★ he/she/it has | challenged |
| ★ we have | challenged |
| ★ you have | challenged |
| ★ they have | challenged |