I may ultracentrifuge you may ultracentrifuge he may ultracentrifuge we may ultracentrifuge you may ultracentrifuge they may ultracentrifuge
V-ing form
I may be ultracentrifuging you may be ultracentrifuging he may be ultracentrifuging we may be ultracentrifuging you may be ultracentrifuging they may be ultracentrifuging
Perfect
I may have ultracentrifuged you may have ultracentrifuged he may have ultracentrifuged we may have ultracentrifuged you may have ultracentrifuged they may have ultracentrifuged
V-ing perfect
I may have been ultracentrifuging you may have been ultracentrifuging he may have been ultracentrifuging we may have been ultracentrifuging you may have been ultracentrifuging they may have been ultracentrifuging
Negation
Simple form
I mayn't ultracentrifuge you mayn't ultracentrifuge he mayn't ultracentrifuge we mayn't ultracentrifuge you mayn't ultracentrifuge they mayn't ultracentrifuge
V-ing form
I mayn't be ultracentrifuging you mayn't be ultracentrifuging he mayn't be ultracentrifuging we mayn't be ultracentrifuging you mayn't be ultracentrifuging they mayn't be ultracentrifuging
Perfect
I mayn't have ultracentrifuged you mayn't have ultracentrifuged he mayn't have ultracentrifuged we mayn't have ultracentrifuged you mayn't have ultracentrifuged they mayn't have ultracentrifuged
V-ing perfect
I mayn't have been ultracentrifuging you mayn't have been ultracentrifuging he mayn't have been ultracentrifuging we mayn't have been ultracentrifuging you mayn't have been ultracentrifuging they mayn't have been ultracentrifuging
Interrogative form
Simple form
may I ultracentrifuge? may you ultracentrifuge? may he ultracentrifuge? may we ultracentrifuge? may you ultracentrifuge? may they ultracentrifuge?
V-ing form
may I be ultracentrifuging? may you be ultracentrifuging? may he be ultracentrifuging? may we be ultracentrifuging? may you be ultracentrifuging? may they be ultracentrifuging?
Perfect
may I have ultracentrifuged? may you have ultracentrifuged? may he have ultracentrifuged? may we have ultracentrifuged? may you have ultracentrifuged? may they have ultracentrifuged?
V-ing perfect
may I have been ultracentrifuging? may you have been ultracentrifuging? may he have been ultracentrifuging? may we have been ultracentrifuging? may you have been ultracentrifuging? may they have been ultracentrifuging?
Interro-negative form
Simple form
mayn't I ultracentrifuge? mayn't you ultracentrifuge? mayn't he ultracentrifuge? mayn't we ultracentrifuge? mayn't you ultracentrifuge? mayn't they ultracentrifuge?
V-ing form
mayn't I be ultracentrifuging? mayn't you be ultracentrifuging? mayn't he be ultracentrifuging? mayn't we be ultracentrifuging? mayn't you be ultracentrifuging? mayn't they be ultracentrifuging?
Perfect
mayn't I have ultracentrifuged? mayn't you have ultracentrifuged? mayn't he have ultracentrifuged? mayn't we have ultracentrifuged? mayn't you have ultracentrifuged? mayn't they have ultracentrifuged?
V-ing perfect
mayn't I have been ultracentrifuging? mayn't you have been ultracentrifuging? mayn't he have been ultracentrifuging? mayn't we have been ultracentrifuging? mayn't you have been ultracentrifuging? mayn't they have been ultracentrifuging?