should subserve
Regular verb: subserve - subserved- subserved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd subserve
you'd subserve
she'd subserve
we'd subserve
you'd subserve
they'd subserve 	I'd be subserving
you'd be subserving
she'd be subserving
we'd be subserving
you'd be subserving
they'd be subserving	I should've subserved
you should've subserved
she should've subserved
we should've subserved
you should've subserved
they should've subserved	I should've been subserving
you should've been subserving
she should've been subserving
we should've been subserving
you should've been subserving
they should've been subserving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't subserve
you shouldn't subserve
she shouldn't subserve
we shouldn't subserve
you shouldn't subserve
they shouldn't subserve 	I shouldn't be subserving
you shouldn't be subserving
she shouldn't be subserving
we shouldn't be subserving
you shouldn't be subserving
they shouldn't be subserving	I shouldn't have subserved
you shouldn't have subserved
she shouldn't have subserved
we shouldn't have subserved
you shouldn't have subserved
they shouldn't have subserved	I shouldn't have been subserving
you shouldn't have been subserving
she shouldn't have been subserving
we shouldn't have been subserving
you shouldn't have been subserving
they shouldn't have been subserving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I subserve?
should you subserve?
should she subserve?
should we subserve?
should you subserve?
should they subserve? 	should I be subserving?
should you be subserving?
should she be subserving?
should we be subserving?
should you be subserving?
should they be subserving? 	should I have subserved?
should you have subserved?
should she have subserved?
should we have subserved?
should you have subserved?
should they have subserved? 	should I have been subserving?
should you have been subserving?
should she have been subserving?
should we have been subserving?
should you have been subserving?
should they have been subserving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I subserve?
shouldn't you subserve?
shouldn't she subserve?
shouldn't we subserve?
shouldn't you subserve?
shouldn't they subserve? 	shouldn't I be subserving?
shouldn't you be subserving?
shouldn't she be subserving?
shouldn't we be subserving?
shouldn't you be subserving?
shouldn't they be subserving? 	shouldn't I have subserved?
shouldn't you have subserved?
shouldn't she have subserved?
shouldn't we have subserved?
shouldn't you have subserved?
shouldn't they have subserved? 	shouldn't I have been subserving?
shouldn't you have been subserving?
shouldn't she have been subserving?
shouldn't we have been subserving?
shouldn't you have been subserving?
shouldn't they have been subserving?