I may smile you may smile he may smile we may smile you may smile they may smile
V-ing form
I may be smiling you may be smiling he may be smiling we may be smiling you may be smiling they may be smiling
Perfect
I may have smiled you may have smiled he may have smiled we may have smiled you may have smiled they may have smiled
V-ing perfect
I may have been smiling you may have been smiling he may have been smiling we may have been smiling you may have been smiling they may have been smiling
Negation
Simple form
I may not smile you may not smile he may not smile we may not smile you may not smile they may not smile
V-ing form
I may not be smiling you may not be smiling he may not be smiling we may not be smiling you may not be smiling they may not be smiling
Perfect
I may not have smiled you may not have smiled he may not have smiled we may not have smiled you may not have smiled they may not have smiled
V-ing perfect
I may not have been smiling you may not have been smiling he may not have been smiling we may not have been smiling you may not have been smiling they may not have been smiling
Interrogative form
Simple form
may I smile? may you smile? may he smile? may we smile? may you smile? may they smile?
V-ing form
may I be smiling? may you be smiling? may he be smiling? may we be smiling? may you be smiling? may they be smiling?
Perfect
may I have smiled? may you have smiled? may he have smiled? may we have smiled? may you have smiled? may they have smiled?
V-ing perfect
may I have been smiling? may you have been smiling? may he have been smiling? may we have been smiling? may you have been smiling? may they have been smiling?
Interro-negative form
Simple form
may I not smile? may you not smile? may he not smile? may we not smile? may you not smile? may they not smile?
V-ing form
may I not be smiling? may you not be smiling? may he not be smiling? may we not be smiling? may you not be smiling? may they not be smiling?
Perfect
may I not have smiled? may you not have smiled? may he not have smiled? may we not have smiled? may you not have smiled? may they not have smiled?
V-ing perfect
may I not have been smiling? may you not have been smiling? may he not have been smiling? may we not have been smiling? may you not have been smiling? may they not have been smiling?