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 may not scratch you may not scratch he may not scratch we may not scratch you may not scratch they may not scratch
V-ing form
I may not be scratching you may not be scratching he may not be scratching we may not be scratching you may not be scratching they may not be scratching
Perfect
I may not have scratched you may not have scratched he may not have scratched we may not have scratched you may not have scratched they may not have scratched
V-ing perfect
I may not have been scratching you may not have been scratching he may not have been scratching we may not have been scratching you may not have been scratching they may not 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
may I not scratch? may you not scratch? may he not scratch? may we not scratch? may you not scratch? may they not scratch?
V-ing form
may I not be scratching? may you not be scratching? may he not be scratching? may we not be scratching? may you not be scratching? may they not be scratching?
Perfect
may I not have scratched? may you not have scratched? may he not have scratched? may we not have scratched? may you not have scratched? may they not have scratched?
V-ing perfect
may I not have been scratching? may you not have been scratching? may he not have been scratching? may we not have been scratching? may you not have been scratching? may they not have been scratching?