I may pump you may pump he may pump we may pump you may pump they may pump
V-ing form
I may be pumping you may be pumping he may be pumping we may be pumping you may be pumping they may be pumping
Perfect
I may have pumped you may have pumped he 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 he may have been pumping we may have been pumping you may have been pumping they may have been pumping
Negation
Simple form
I may not pump you may not pump he may not pump we may not pump you may not pump they may not pump
V-ing form
I may not be pumping you may not be pumping he may not be pumping we may not be pumping you may not be pumping they may not be pumping
Perfect
I may not have pumped you may not have pumped he may not have pumped we may not have pumped you may not have pumped they may not have pumped
V-ing perfect
I may not have been pumping you may not have been pumping he may not have been pumping we may not have been pumping you may not have been pumping they may not have been pumping
Interrogative form
Simple form
may I pump? may you pump? may he pump? may we pump? may you pump? may they pump?
V-ing form
may I be pumping? may you be pumping? may he be pumping? may we be pumping? may you be pumping? may they be pumping?
Perfect
may I have pumped? may you have pumped? may he 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 he have been pumping? may we have been pumping? may you have been pumping? may they have been pumping?
Interro-negative form
Simple form
may I not pump? may you not pump? may he not pump? may we not pump? may you not pump? may they not pump?
V-ing form
may I not be pumping? may you not be pumping? may he not be pumping? may we not be pumping? may you not be pumping? may they not be pumping?
Perfect
may I not have pumped? may you not have pumped? may he not have pumped? may we not have pumped? may you not have pumped? may they not have pumped?
V-ing perfect
may I not have been pumping? may you not have been pumping? may he not have been pumping? may we not have been pumping? may you not have been pumping? may they not have been pumping?