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