I may bs you may bs he may bs we may bs you may bs they may bs
V-ing form
I may be bsing you may be bsing he may be bsing we may be bsing you may be bsing they may be bsing
Perfect
I may have bsed you may have bsed he may have bsed we may have bsed you may have bsed they may have bsed
V-ing perfect
I may have been bsing you may have been bsing he may have been bsing we may have been bsing you may have been bsing they may have been bsing
Negation
Simple form
I mayn't bs you mayn't bs he mayn't bs we mayn't bs you mayn't bs they mayn't bs
V-ing form
I mayn't be bsing you mayn't be bsing he mayn't be bsing we mayn't be bsing you mayn't be bsing they mayn't be bsing
Perfect
I mayn't have bsed you mayn't have bsed he mayn't have bsed we mayn't have bsed you mayn't have bsed they mayn't have bsed
V-ing perfect
I mayn't have been bsing you mayn't have been bsing he mayn't have been bsing we mayn't have been bsing you mayn't have been bsing they mayn't have been bsing
Interrogative form
Simple form
may I bs? may you bs? may he bs? may we bs? may you bs? may they bs?
V-ing form
may I be bsing? may you be bsing? may he be bsing? may we be bsing? may you be bsing? may they be bsing?
Perfect
may I have bsed? may you have bsed? may he have bsed? may we have bsed? may you have bsed? may they have bsed?
V-ing perfect
may I have been bsing? may you have been bsing? may he have been bsing? may we have been bsing? may you have been bsing? may they have been bsing?
Interro-negative form
Simple form
mayn't I bs? mayn't you bs? mayn't he bs? mayn't we bs? mayn't you bs? mayn't they bs?
V-ing form
mayn't I be bsing? mayn't you be bsing? mayn't he be bsing? mayn't we be bsing? mayn't you be bsing? mayn't they be bsing?
Perfect
mayn't I have bsed? mayn't you have bsed? mayn't he have bsed? mayn't we have bsed? mayn't you have bsed? mayn't they have bsed?
V-ing perfect
mayn't I have been bsing? mayn't you have been bsing? mayn't he have been bsing? mayn't we have been bsing? mayn't you have been bsing? mayn't they have been bsing?