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