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