English verb conjugation
SHOULD CHALLENGE

Regular verb: challenge - challenged - challenged

Affirmation

Simple form	V-ing form
I'd challenge you'd challenge he'd challenge we'd challenge you'd challenge they'd challenge	I'd be challenging you'd be challenging he'd be challenging we'd be challenging you'd be challenging they'd be challenging
Perfect	V-ing perfect
I should've challenged you should've challenged he should've challenged we should've challenged you should've challenged they should've challenged	I should've been challenging you should've been challenging he should've been challenging we should've been challenging you should've been challenging they should've been challenging

Negation

Simple form	V-ing form
I shouldn't challenge you shouldn't challenge he shouldn't challenge we shouldn't challenge you shouldn't challenge they shouldn't challenge	I shouldn't be challenging you shouldn't be challenging he shouldn't be challenging we shouldn't be challenging you shouldn't be challenging they shouldn't be challenging
Perfect	V-ing perfect
I shouldn't have challenged you shouldn't have challenged he shouldn't have challenged we shouldn't have challenged you shouldn't have challenged they shouldn't have challenged	I shouldn't have been challenging you shouldn't have been challenging he shouldn't have been challenging we shouldn't have been challenging you shouldn't have been challenging they shouldn't have been challenging

Interrogative form

Simple form	V-ing form
should I challenge? should you challenge? should he challenge? should we challenge? should you challenge? should they challenge?	should I be challenging? should you be challenging? should he be challenging? should we be challenging? should you be challenging? should they be challenging?
Perfect	V-ing perfect
should I have challenged? should you have challenged? should he have challenged? should we have challenged? should you have challenged? should they have challenged?	should I have been challenging? should you have been challenging? should he have been challenging? should we have been challenging? should you have been challenging? should they have been challenging?

Interro-negative form

Simple form	V-ing form
shouldn't I challenge? shouldn't you challenge? shouldn't he challenge? shouldn't we challenge? shouldn't you challenge? shouldn't they challenge?	shouldn't I be challenging? shouldn't you be challenging? shouldn't he be challenging? shouldn't we be challenging? shouldn't you be challenging? shouldn't they be challenging?
Perfect	V-ing perfect
shouldn't I have challenged? shouldn't you have challenged? shouldn't he have challenged? shouldn't we have challenged? shouldn't you have challenged? shouldn't they have challenged?	shouldn't I have been challenging? shouldn't you have been challenging? shouldn't he have been challenging? shouldn't we have been challenging? shouldn't you have been challenging? shouldn't they have been challenging?