I'd be centrifuging you'd be centrifuging he'd be centrifuging we'd be centrifuging you'd be centrifuging they'd be centrifuging
Perfect
I should've centrifuged you should've centrifuged he should've centrifuged we should've centrifuged you should've centrifuged they should've centrifuged
V-ing perfect
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
I shouldn't centrifuge you shouldn't centrifuge he shouldn't centrifuge we shouldn't centrifuge you shouldn't centrifuge they shouldn't centrifuge
V-ing form
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
Perfect
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
V-ing perfect
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
should I centrifuge? should you centrifuge? should he centrifuge? should we centrifuge? should you centrifuge? should they centrifuge?
V-ing form
should I be centrifuging? should you be centrifuging? should he be centrifuging? should we be centrifuging? should you be centrifuging? should they be centrifuging?
Perfect
should I have centrifuged? should you have centrifuged? should he have centrifuged? should we have centrifuged? should you have centrifuged? should they have centrifuged?
V-ing perfect
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
shouldn't I centrifuge? shouldn't you centrifuge? shouldn't he centrifuge? shouldn't we centrifuge? shouldn't you centrifuge? shouldn't they centrifuge?
V-ing form
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?
Perfect
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?
V-ing perfect
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?