Regular verb: challenge - challenged - challenged
Simple form | V-ing form |
I must challenge you must challenge she must challenge we must challenge you must challenge they must challenge | I must be challenging you must be challenging she must be challenging we must be challenging you must be challenging they must be challenging |
Perfect | V-ing perfect |
I must have challenged you must have challenged she must have challenged we must have challenged you must have challenged they must have challenged | I must have been challenging you must have been challenging she must have been challenging we must have been challenging you must have been challenging they must have been challenging |
Simple form | V-ing form |
I must not challenge you must not challenge she must not challenge we must not challenge you must not challenge they must not challenge | I must not be challenging you must not be challenging she must not be challenging we must not be challenging you must not be challenging they must not be challenging |
Perfect | V-ing perfect |
I must not have challenged you must not have challenged she must not have challenged we must not have challenged you must not have challenged they must not have challenged | I must not have been challenging you must not have been challenging she must not have been challenging we must not have been challenging you must not have been challenging they must not have been challenging |
Simple form | V-ing form |
must I challenge? must you challenge? must she challenge? must we challenge? must you challenge? must they challenge? | must I be challenging? must you be challenging? must she be challenging? must we be challenging? must you be challenging? must they be challenging? |
Perfect | V-ing perfect |
must I have challenged? must you have challenged? must she have challenged? must we have challenged? must you have challenged? must they have challenged? | must I have been challenging? must you have been challenging? must she have been challenging? must we have been challenging? must you have been challenging? must they have been challenging? |
Simple form | V-ing form |
must I not challenge? must you not challenge? must she not challenge? must we not challenge? must you not challenge? must they not challenge? | must I not be challenging? must you not be challenging? must she not be challenging? must we not be challenging? must you not be challenging? must they not be challenging? |
Perfect | V-ing perfect |
must I not have challenged? must you not have challenged? must she not have challenged? must we not have challenged? must you not have challenged? must they not have challenged? | must I not have been challenging? must you not have been challenging? must she not have been challenging? must we not have been challenging? must you not have been challenging? must they not have been challenging? |