I may erect you may erect he may erect we may erect you may erect they may erect
V-ing form
I may be erecting you may be erecting he may be erecting we may be erecting you may be erecting they may be erecting
Perfect
I may have erected you may have erected he 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 he 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 he 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 he 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 he 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 he 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 he erect? may we erect? may you erect? may they erect?
V-ing form
may I be erecting? may you be erecting? may he be erecting? may we be erecting? may you be erecting? may they be erecting?
Perfect
may I have erected? may you have erected? may he 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 he 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 he 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 he 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 he 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 he have been erecting? mayn't we have been erecting? mayn't you have been erecting? mayn't they have been erecting?