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