I may water-ski you may water-ski he may water-ski we may water-ski you may water-ski they may water-ski
V-ing form
I may be water-skiing you may be water-skiing he may be water-skiing we may be water-skiing you may be water-skiing they may be water-skiing
Perfect
I may have water-skied you may have water-skied he may have water-skied we may have water-skied you may have water-skied they may have water-skied
V-ing perfect
I may have been water-skiing you may have been water-skiing he may have been water-skiing we may have been water-skiing you may have been water-skiing they may have been water-skiing
Negation
Simple form
I may not water-ski you may not water-ski he may not water-ski we may not water-ski you may not water-ski they may not water-ski
V-ing form
I may not be water-skiing you may not be water-skiing he may not be water-skiing we may not be water-skiing you may not be water-skiing they may not be water-skiing
Perfect
I may not have water-skied you may not have water-skied he may not have water-skied we may not have water-skied you may not have water-skied they may not have water-skied
V-ing perfect
I may not have been water-skiing you may not have been water-skiing he may not have been water-skiing we may not have been water-skiing you may not have been water-skiing they may not have been water-skiing
Interrogative form
Simple form
may I water-ski? may you water-ski? may he water-ski? may we water-ski? may you water-ski? may they water-ski?
V-ing form
may I be water-skiing? may you be water-skiing? may he be water-skiing? may we be water-skiing? may you be water-skiing? may they be water-skiing?
Perfect
may I have water-skied? may you have water-skied? may he have water-skied? may we have water-skied? may you have water-skied? may they have water-skied?
V-ing perfect
may I have been water-skiing? may you have been water-skiing? may he have been water-skiing? may we have been water-skiing? may you have been water-skiing? may they have been water-skiing?
Interro-negative form
Simple form
may I not water-ski? may you not water-ski? may he not water-ski? may we not water-ski? may you not water-ski? may they not water-ski?
V-ing form
may I not be water-skiing? may you not be water-skiing? may he not be water-skiing? may we not be water-skiing? may you not be water-skiing? may they not be water-skiing?
Perfect
may I not have water-skied? may you not have water-skied? may he not have water-skied? may we not have water-skied? may you not have water-skied? may they not have water-skied?
V-ing perfect
may I not have been water-skiing? may you not have been water-skiing? may he not have been water-skiing? may we not have been water-skiing? may you not have been water-skiing? may they not have been water-skiing?