should centrifuge
Regular verb: centrifuge - centrifuged- centrifuged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd centrifuge
you'd centrifuge
he'd centrifuge
we'd centrifuge
you'd centrifuge
they'd centrifuge 	I'd be centrifuging
you'd be centrifuging
he'd be centrifuging
we'd be centrifuging
you'd be centrifuging
they'd be centrifuging	I should've centrifuged
you should've centrifuged
he should've centrifuged
we should've centrifuged
you should've centrifuged
they should've centrifuged	I should've been centrifuging
you should've been centrifuging
he should've been centrifuging
we should've been centrifuging
you should've been centrifuging
they should've been centrifuging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't centrifuge
you shouldn't centrifuge
he shouldn't centrifuge
we shouldn't centrifuge
you shouldn't centrifuge
they shouldn't centrifuge 	I shouldn't be centrifuging
you shouldn't be centrifuging
he shouldn't be centrifuging
we shouldn't be centrifuging
you shouldn't be centrifuging
they shouldn't be centrifuging	I shouldn't have centrifuged
you shouldn't have centrifuged
he shouldn't have centrifuged
we shouldn't have centrifuged
you shouldn't have centrifuged
they shouldn't have centrifuged	I shouldn't have been centrifuging
you shouldn't have been centrifuging
he shouldn't have been centrifuging
we shouldn't have been centrifuging
you shouldn't have been centrifuging
they shouldn't have been centrifuging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I centrifuge?
should you centrifuge?
should he centrifuge?
should we centrifuge?
should you centrifuge?
should they centrifuge? 	should I be centrifuging?
should you be centrifuging?
should he be centrifuging?
should we be centrifuging?
should you be centrifuging?
should they be centrifuging? 	should I have centrifuged?
should you have centrifuged?
should he have centrifuged?
should we have centrifuged?
should you have centrifuged?
should they have centrifuged? 	should I have been centrifuging?
should you have been centrifuging?
should he have been centrifuging?
should we have been centrifuging?
should you have been centrifuging?
should they have been centrifuging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I centrifuge?
shouldn't you centrifuge?
shouldn't he centrifuge?
shouldn't we centrifuge?
shouldn't you centrifuge?
shouldn't they centrifuge? 	shouldn't I be centrifuging?
shouldn't you be centrifuging?
shouldn't he be centrifuging?
shouldn't we be centrifuging?
shouldn't you be centrifuging?
shouldn't they be centrifuging? 	shouldn't I have centrifuged?
shouldn't you have centrifuged?
shouldn't he have centrifuged?
shouldn't we have centrifuged?
shouldn't you have centrifuged?
shouldn't they have centrifuged? 	shouldn't I have been centrifuging?
shouldn't you have been centrifuging?
shouldn't he have been centrifuging?
shouldn't we have been centrifuging?
shouldn't you have been centrifuging?
shouldn't they have been centrifuging?