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