should fulfill
Regular verb: fulfill - fulfilled- fulfilled

Affirmation 	
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I'd fulfill
you'd fulfill
he'd fulfill
we'd fulfill
you'd fulfill
they'd fulfill 	I'd be fulfilling
you'd be fulfilling
he'd be fulfilling
we'd be fulfilling
you'd be fulfilling
they'd be fulfilling	I should've fulfilled
you should've fulfilled
he should've fulfilled
we should've fulfilled
you should've fulfilled
they should've fulfilled	I should've been fulfilling
you should've been fulfilling
he should've been fulfilling
we should've been fulfilling
you should've been fulfilling
they should've been fulfilling	

Negation 	
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I shouldn't fulfill
you shouldn't fulfill
he shouldn't fulfill
we shouldn't fulfill
you shouldn't fulfill
they shouldn't fulfill 	I shouldn't be fulfilling
you shouldn't be fulfilling
he shouldn't be fulfilling
we shouldn't be fulfilling
you shouldn't be fulfilling
they shouldn't be fulfilling	I shouldn't have fulfilled
you shouldn't have fulfilled
he shouldn't have fulfilled
we shouldn't have fulfilled
you shouldn't have fulfilled
they shouldn't have fulfilled	I shouldn't have been fulfilling
you shouldn't have been fulfilling
he shouldn't have been fulfilling
we shouldn't have been fulfilling
you shouldn't have been fulfilling
they shouldn't have been fulfilling	

Interrogative form 	
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should I fulfill?
should you fulfill?
should he fulfill?
should we fulfill?
should you fulfill?
should they fulfill? 	should I be fulfilling?
should you be fulfilling?
should he be fulfilling?
should we be fulfilling?
should you be fulfilling?
should they be fulfilling? 	should I have fulfilled?
should you have fulfilled?
should he have fulfilled?
should we have fulfilled?
should you have fulfilled?
should they have fulfilled? 	should I have been fulfilling?
should you have been fulfilling?
should he have been fulfilling?
should we have been fulfilling?
should you have been fulfilling?
should they have been fulfilling? 	

Interro-negative form 	
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shouldn't I fulfill?
shouldn't you fulfill?
shouldn't he fulfill?
shouldn't we fulfill?
shouldn't you fulfill?
shouldn't they fulfill? 	shouldn't I be fulfilling?
shouldn't you be fulfilling?
shouldn't he be fulfilling?
shouldn't we be fulfilling?
shouldn't you be fulfilling?
shouldn't they be fulfilling? 	shouldn't I have fulfilled?
shouldn't you have fulfilled?
shouldn't he have fulfilled?
shouldn't we have fulfilled?
shouldn't you have fulfilled?
shouldn't they have fulfilled? 	shouldn't I have been fulfilling?
shouldn't you have been fulfilling?
shouldn't he have been fulfilling?
shouldn't we have been fulfilling?
shouldn't you have been fulfilling?
shouldn't they have been fulfilling?