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 may not fold you may not fold he may not fold we may not fold you may not fold they may not fold
V-ing form
I may not be folding you may not be folding he may not be folding we may not be folding you may not be folding they may not be folding
Perfect
I may not have folded you may not have folded he may not have folded we may not have folded you may not have folded they may not have folded
V-ing perfect
I may not have been folding you may not have been folding he may not have been folding we may not have been folding you may not have been folding they may not 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
may I not fold? may you not fold? may he not fold? may we not fold? may you not fold? may they not fold?
V-ing form
may I not be folding? may you not be folding? may he not be folding? may we not be folding? may you not be folding? may they not be folding?
Perfect
may I not have folded? may you not have folded? may he not have folded? may we not have folded? may you not have folded? may they not have folded?
V-ing perfect
may I not have been folding? may you not have been folding? may he not have been folding? may we not have been folding? may you not have been folding? may they not have been folding?