I can ultracentrifuge you can ultracentrifuge he can ultracentrifuge we can ultracentrifuge you can ultracentrifuge they can ultracentrifuge
V-ing form
I can be ultracentrifuging you can be ultracentrifuging he can be ultracentrifuging we can be ultracentrifuging you can be ultracentrifuging they can be ultracentrifuging
Perfect
I can have ultracentrifuged you can have ultracentrifuged he can have ultracentrifuged we can have ultracentrifuged you can have ultracentrifuged they can have ultracentrifuged
V-ing perfect
I can have been ultracentrifuging you can have been ultracentrifuging he can have been ultracentrifuging we can have been ultracentrifuging you can have been ultracentrifuging they can have been ultracentrifuging
Negation
Simple form
I cannot ultracentrifuge you cannot ultracentrifuge he cannot ultracentrifuge we cannot ultracentrifuge you cannot ultracentrifuge they cannot ultracentrifuge
V-ing form
I cannot be ultracentrifuging you cannot be ultracentrifuging he cannot be ultracentrifuging we cannot be ultracentrifuging you cannot be ultracentrifuging they cannot be ultracentrifuging
Perfect
I cannot have ultracentrifuged you cannot have ultracentrifuged he cannot have ultracentrifuged we cannot have ultracentrifuged you cannot have ultracentrifuged they cannot have ultracentrifuged
V-ing perfect
I cannot have been ultracentrifuging you cannot have been ultracentrifuging he cannot have been ultracentrifuging we cannot have been ultracentrifuging you cannot have been ultracentrifuging they cannot have been ultracentrifuging
Interrogative form
Simple form
can I ultracentrifuge? can you ultracentrifuge? can he ultracentrifuge? can we ultracentrifuge? can you ultracentrifuge? can they ultracentrifuge?
V-ing form
can I be ultracentrifuging? can you be ultracentrifuging? can he be ultracentrifuging? can we be ultracentrifuging? can you be ultracentrifuging? can they be ultracentrifuging?
Perfect
can I have ultracentrifuged? can you have ultracentrifuged? can he have ultracentrifuged? can we have ultracentrifuged? can you have ultracentrifuged? can they have ultracentrifuged?
V-ing perfect
can I have been ultracentrifuging? can you have been ultracentrifuging? can he have been ultracentrifuging? can we have been ultracentrifuging? can you have been ultracentrifuging? can they have been ultracentrifuging?
Interro-negative form
Simple form
can I not ultracentrifuge? can you not ultracentrifuge? can he not ultracentrifuge? can we not ultracentrifuge? can you not ultracentrifuge? can they not ultracentrifuge?
V-ing form
can I not be ultracentrifuging? can you not be ultracentrifuging? can he not be ultracentrifuging? can we not be ultracentrifuging? can you not be ultracentrifuging? can they not be ultracentrifuging?
Perfect
can I not have ultracentrifuged? can you not have ultracentrifuged? can he not have ultracentrifuged? can we not have ultracentrifuged? can you not have ultracentrifuged? can they not have ultracentrifuged?
V-ing perfect
can I not have been ultracentrifuging? can you not have been ultracentrifuging? can he not have been ultracentrifuging? can we not have been ultracentrifuging? can you not have been ultracentrifuging? can they not have been ultracentrifuging?