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