I may barn you may barn he may barn we may barn you may barn they may barn
V-ing form
I may be barning you may be barning he may be barning we may be barning you may be barning they may be barning
Perfect
I may have barned you may have barned he may have barned we may have barned you may have barned they may have barned
V-ing perfect
I may have been barning you may have been barning he may have been barning we may have been barning you may have been barning they may have been barning
Negation
Simple form
I may not barn you may not barn he may not barn we may not barn you may not barn they may not barn
V-ing form
I may not be barning you may not be barning he may not be barning we may not be barning you may not be barning they may not be barning
Perfect
I may not have barned you may not have barned he may not have barned we may not have barned you may not have barned they may not have barned
V-ing perfect
I may not have been barning you may not have been barning he may not have been barning we may not have been barning you may not have been barning they may not have been barning
Interrogative form
Simple form
may I barn? may you barn? may he barn? may we barn? may you barn? may they barn?
V-ing form
may I be barning? may you be barning? may he be barning? may we be barning? may you be barning? may they be barning?
Perfect
may I have barned? may you have barned? may he have barned? may we have barned? may you have barned? may they have barned?
V-ing perfect
may I have been barning? may you have been barning? may he have been barning? may we have been barning? may you have been barning? may they have been barning?
Interro-negative form
Simple form
may I not barn? may you not barn? may he not barn? may we not barn? may you not barn? may they not barn?
V-ing form
may I not be barning? may you not be barning? may he not be barning? may we not be barning? may you not be barning? may they not be barning?
Perfect
may I not have barned? may you not have barned? may he not have barned? may we not have barned? may you not have barned? may they not have barned?
V-ing perfect
may I not have been barning? may you not have been barning? may he not have been barning? may we not have been barning? may you not have been barning? may they not have been barning?