should perdure
Regular verb: perdure - perdured- perdured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd perdure
you'd perdure
he'd perdure
we'd perdure
you'd perdure
they'd perdure 	I'd be perduring
you'd be perduring
he'd be perduring
we'd be perduring
you'd be perduring
they'd be perduring	I should've perdured
you should've perdured
he should've perdured
we should've perdured
you should've perdured
they should've perdured	I should've been perduring
you should've been perduring
he should've been perduring
we should've been perduring
you should've been perduring
they should've been perduring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't perdure
you shouldn't perdure
he shouldn't perdure
we shouldn't perdure
you shouldn't perdure
they shouldn't perdure 	I shouldn't be perduring
you shouldn't be perduring
he shouldn't be perduring
we shouldn't be perduring
you shouldn't be perduring
they shouldn't be perduring	I shouldn't have perdured
you shouldn't have perdured
he shouldn't have perdured
we shouldn't have perdured
you shouldn't have perdured
they shouldn't have perdured	I shouldn't have been perduring
you shouldn't have been perduring
he shouldn't have been perduring
we shouldn't have been perduring
you shouldn't have been perduring
they shouldn't have been perduring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I perdure?
should you perdure?
should he perdure?
should we perdure?
should you perdure?
should they perdure? 	should I be perduring?
should you be perduring?
should he be perduring?
should we be perduring?
should you be perduring?
should they be perduring? 	should I have perdured?
should you have perdured?
should he have perdured?
should we have perdured?
should you have perdured?
should they have perdured? 	should I have been perduring?
should you have been perduring?
should he have been perduring?
should we have been perduring?
should you have been perduring?
should they have been perduring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I perdure?
shouldn't you perdure?
shouldn't he perdure?
shouldn't we perdure?
shouldn't you perdure?
shouldn't they perdure? 	shouldn't I be perduring?
shouldn't you be perduring?
shouldn't he be perduring?
shouldn't we be perduring?
shouldn't you be perduring?
shouldn't they be perduring? 	shouldn't I have perdured?
shouldn't you have perdured?
shouldn't he have perdured?
shouldn't we have perdured?
shouldn't you have perdured?
shouldn't they have perdured? 	shouldn't I have been perduring?
shouldn't you have been perduring?
shouldn't he have been perduring?
shouldn't we have been perduring?
shouldn't you have been perduring?
shouldn't they have been perduring?