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