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