Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may dam up you may dam up he may dam up we may dam up you may dam up they may dam up
V-ing form
I may be dam uping you may be dam uping he may be dam uping we may be dam uping you may be dam uping they may be dam uping
Perfect
I may have dam uped you may have dam uped he may have dam uped we may have dam uped you may have dam uped they may have dam uped
V-ing perfect
I may have been dam uping you may have been dam uping he may have been dam uping we may have been dam uping you may have been dam uping they may have been dam uping
Negation
Simple form
I mayn't dam up you mayn't dam up he mayn't dam up we mayn't dam up you mayn't dam up they mayn't dam up
V-ing form
I mayn't be dam uping you mayn't be dam uping he mayn't be dam uping we mayn't be dam uping you mayn't be dam uping they mayn't be dam uping
Perfect
I mayn't have dam uped you mayn't have dam uped he mayn't have dam uped we mayn't have dam uped you mayn't have dam uped they mayn't have dam uped
V-ing perfect
I mayn't have been dam uping you mayn't have been dam uping he mayn't have been dam uping we mayn't have been dam uping you mayn't have been dam uping they mayn't have been dam uping
Interrogative form
Simple form
may I dam up? may you dam up? may he dam up? may we dam up? may you dam up? may they dam up?
V-ing form
may I be dam uping? may you be dam uping? may he be dam uping? may we be dam uping? may you be dam uping? may they be dam uping?
Perfect
may I have dam uped? may you have dam uped? may he have dam uped? may we have dam uped? may you have dam uped? may they have dam uped?
V-ing perfect
may I have been dam uping? may you have been dam uping? may he have been dam uping? may we have been dam uping? may you have been dam uping? may they have been dam uping?
Interro-negative form
Simple form
mayn't I dam up? mayn't you dam up? mayn't he dam up? mayn't we dam up? mayn't you dam up? mayn't they dam up?
V-ing form
mayn't I be dam uping? mayn't you be dam uping? mayn't he be dam uping? mayn't we be dam uping? mayn't you be dam uping? mayn't they be dam uping?
Perfect
mayn't I have dam uped? mayn't you have dam uped? mayn't he have dam uped? mayn't we have dam uped? mayn't you have dam uped? mayn't they have dam uped?
V-ing perfect
mayn't I have been dam uping? mayn't you have been dam uping? mayn't he have been dam uping? mayn't we have been dam uping? mayn't you have been dam uping? mayn't they have been dam uping?