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