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