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