I may pump you may pump she may pump we may pump you may pump they may pump
V-ing form
I may be pumping you may be pumping she may be pumping we may be pumping you may be pumping they may be pumping
Perfect
I may have pumped you may have pumped she may have pumped we may have pumped you may have pumped they may have pumped
V-ing perfect
I may have been pumping you may have been pumping she may have been pumping we may have been pumping you may have been pumping they may have been pumping
Negation
Simple form
I mayn't pump you mayn't pump she mayn't pump we mayn't pump you mayn't pump they mayn't pump
V-ing form
I mayn't be pumping you mayn't be pumping she mayn't be pumping we mayn't be pumping you mayn't be pumping they mayn't be pumping
Perfect
I mayn't have pumped you mayn't have pumped she mayn't have pumped we mayn't have pumped you mayn't have pumped they mayn't have pumped
V-ing perfect
I mayn't have been pumping you mayn't have been pumping she mayn't have been pumping we mayn't have been pumping you mayn't have been pumping they mayn't have been pumping
Interrogative form
Simple form
may I pump? may you pump? may she pump? may we pump? may you pump? may they pump?
V-ing form
may I be pumping? may you be pumping? may she be pumping? may we be pumping? may you be pumping? may they be pumping?
Perfect
may I have pumped? may you have pumped? may she have pumped? may we have pumped? may you have pumped? may they have pumped?
V-ing perfect
may I have been pumping? may you have been pumping? may she have been pumping? may we have been pumping? may you have been pumping? may they have been pumping?
Interro-negative form
Simple form
mayn't I pump? mayn't you pump? mayn't she pump? mayn't we pump? mayn't you pump? mayn't they pump?
V-ing form
mayn't I be pumping? mayn't you be pumping? mayn't she be pumping? mayn't we be pumping? mayn't you be pumping? mayn't they be pumping?
Perfect
mayn't I have pumped? mayn't you have pumped? mayn't she have pumped? mayn't we have pumped? mayn't you have pumped? mayn't they have pumped?
V-ing perfect
mayn't I have been pumping? mayn't you have been pumping? mayn't she have been pumping? mayn't we have been pumping? mayn't you have been pumping? mayn't they have been pumping?