should require
Regular verb: require - required- required

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd require
you'd require
she'd require
we'd require
you'd require
they'd require 	I'd be requiring
you'd be requiring
she'd be requiring
we'd be requiring
you'd be requiring
they'd be requiring	I should've required
you should've required
she should've required
we should've required
you should've required
they should've required	I should've been requiring
you should've been requiring
she should've been requiring
we should've been requiring
you should've been requiring
they should've been requiring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't require
you shouldn't require
she shouldn't require
we shouldn't require
you shouldn't require
they shouldn't require 	I shouldn't be requiring
you shouldn't be requiring
she shouldn't be requiring
we shouldn't be requiring
you shouldn't be requiring
they shouldn't be requiring	I shouldn't have required
you shouldn't have required
she shouldn't have required
we shouldn't have required
you shouldn't have required
they shouldn't have required	I shouldn't have been requiring
you shouldn't have been requiring
she shouldn't have been requiring
we shouldn't have been requiring
you shouldn't have been requiring
they shouldn't have been requiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I require?
should you require?
should she require?
should we require?
should you require?
should they require? 	should I be requiring?
should you be requiring?
should she be requiring?
should we be requiring?
should you be requiring?
should they be requiring? 	should I have required?
should you have required?
should she have required?
should we have required?
should you have required?
should they have required? 	should I have been requiring?
should you have been requiring?
should she have been requiring?
should we have been requiring?
should you have been requiring?
should they have been requiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I require?
shouldn't you require?
shouldn't she require?
shouldn't we require?
shouldn't you require?
shouldn't they require? 	shouldn't I be requiring?
shouldn't you be requiring?
shouldn't she be requiring?
shouldn't we be requiring?
shouldn't you be requiring?
shouldn't they be requiring? 	shouldn't I have required?
shouldn't you have required?
shouldn't she have required?
shouldn't we have required?
shouldn't you have required?
shouldn't they have required? 	shouldn't I have been requiring?
shouldn't you have been requiring?
shouldn't she have been requiring?
shouldn't we have been requiring?
shouldn't you have been requiring?
shouldn't they have been requiring?