should calculate
Regular verb: calculate - calculated- calculated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd calculate
you'd calculate
he'd calculate
we'd calculate
you'd calculate
they'd calculate 	I'd be calculating
you'd be calculating
he'd be calculating
we'd be calculating
you'd be calculating
they'd be calculating	I should've calculated
you should've calculated
he should've calculated
we should've calculated
you should've calculated
they should've calculated	I should've been calculating
you should've been calculating
he should've been calculating
we should've been calculating
you should've been calculating
they should've been calculating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't calculate
you shouldn't calculate
he shouldn't calculate
we shouldn't calculate
you shouldn't calculate
they shouldn't calculate 	I shouldn't be calculating
you shouldn't be calculating
he shouldn't be calculating
we shouldn't be calculating
you shouldn't be calculating
they shouldn't be calculating	I shouldn't have calculated
you shouldn't have calculated
he shouldn't have calculated
we shouldn't have calculated
you shouldn't have calculated
they shouldn't have calculated	I shouldn't have been calculating
you shouldn't have been calculating
he shouldn't have been calculating
we shouldn't have been calculating
you shouldn't have been calculating
they shouldn't have been calculating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I calculate?
should you calculate?
should he calculate?
should we calculate?
should you calculate?
should they calculate? 	should I be calculating?
should you be calculating?
should he be calculating?
should we be calculating?
should you be calculating?
should they be calculating? 	should I have calculated?
should you have calculated?
should he have calculated?
should we have calculated?
should you have calculated?
should they have calculated? 	should I have been calculating?
should you have been calculating?
should he have been calculating?
should we have been calculating?
should you have been calculating?
should they have been calculating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I calculate?
shouldn't you calculate?
shouldn't he calculate?
shouldn't we calculate?
shouldn't you calculate?
shouldn't they calculate? 	shouldn't I be calculating?
shouldn't you be calculating?
shouldn't he be calculating?
shouldn't we be calculating?
shouldn't you be calculating?
shouldn't they be calculating? 	shouldn't I have calculated?
shouldn't you have calculated?
shouldn't he have calculated?
shouldn't we have calculated?
shouldn't you have calculated?
shouldn't they have calculated? 	shouldn't I have been calculating?
shouldn't you have been calculating?
shouldn't he have been calculating?
shouldn't we have been calculating?
shouldn't you have been calculating?
shouldn't they have been calculating?