I ought to centrifuge you ought to centrifuge he ought to centrifuge we ought to centrifuge you ought to centrifuge they ought to centrifuge
V-ing form
I ought to be centrifuging you ought to be centrifuging he ought to be centrifuging we ought to be centrifuging you ought to be centrifuging they ought to be centrifuging
Perfect
I ought to have centrifuged you ought to have centrifuged he ought to have centrifuged we ought to have centrifuged you ought to have centrifuged they ought to have centrifuged
V-ing perfect
I ought to have been centrifuging you ought to have been centrifuging he ought to have been centrifuging we ought to have been centrifuging you ought to have been centrifuging they ought to have been centrifuging
Negation
Simple form
I oughtn't to centrifuge you oughtn't to centrifuge he oughtn't to centrifuge we oughtn't to centrifuge you oughtn't to centrifuge they oughtn't to centrifuge
V-ing form
I oughtn't to be centrifuging you oughtn't to be centrifuging he oughtn't to be centrifuging we oughtn't to be centrifuging you oughtn't to be centrifuging they oughtn't to be centrifuging
Perfect
I oughtn't to have centrifuged you oughtn't to have centrifuged he oughtn't to have centrifuged we oughtn't to have centrifuged you oughtn't to have centrifuged they oughtn't to have centrifuged
V-ing perfect
I oughtn't to have been centrifuging you oughtn't to have been centrifuging he oughtn't to have been centrifuging we oughtn't to have been centrifuging you oughtn't to have been centrifuging they oughtn't to have been centrifuging
Interrogative form
Simple form
ought to I centrifuge? ought to you centrifuge? ought to he centrifuge? ought to we centrifuge? ought to you centrifuge? ought to they centrifuge?
V-ing form
ought to I be centrifuging? ought to you be centrifuging? ought to he be centrifuging? ought to we be centrifuging? ought to you be centrifuging? ought to they be centrifuging?
Perfect
ought to I have centrifuged? ought to you have centrifuged? ought to he have centrifuged? ought to we have centrifuged? ought to you have centrifuged? ought to they have centrifuged?
V-ing perfect
ought to I have been centrifuging? ought to you have been centrifuging? ought to he have been centrifuging? ought to we have been centrifuging? ought to you have been centrifuging? ought to they have been centrifuging?
Interro-negative form
Simple form
oughtn't I to centrifuge? oughtn't you to centrifuge? oughtn't he to centrifuge? oughtn't we to centrifuge? oughtn't you to centrifuge? oughtn't they to centrifuge?
V-ing form
oughtn't I to be centrifuging? oughtn't you to be centrifuging? oughtn't he to be centrifuging? oughtn't we to be centrifuging? oughtn't you to be centrifuging? oughtn't they to be centrifuging?
Perfect
oughtn't I to have centrifuged? oughtn't you to have centrifuged? oughtn't he to have centrifuged? oughtn't we to have centrifuged? oughtn't you to have centrifuged? oughtn't they to have centrifuged?
V-ing perfect
oughtn't I to have been centrifuging? oughtn't you to have been centrifuging? oughtn't he to have been centrifuging? oughtn't we to have been centrifuging? oughtn't you to have been centrifuging? oughtn't they to have been centrifuging?