may water-ski
Regular verb: water-ski - water-skied- water-skied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may water-ski
you may water-ski
he may water-ski
we may water-ski
you may water-ski
they may water-ski 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't water-ski
you mayn't water-ski
he mayn't water-ski
we mayn't water-ski
you mayn't water-ski
they mayn't water-ski 	I mayn't be water-skiing
you mayn't be water-skiing
he mayn't be water-skiing
we mayn't be water-skiing
you mayn't be water-skiing
they mayn't be water-skiing	I mayn't have water-skied
you mayn't have water-skied
he mayn't have water-skied
we mayn't have water-skied
you mayn't have water-skied
they mayn't have water-skied	I mayn't have been water-skiing
you mayn't have been water-skiing
he mayn't have been water-skiing
we mayn't have been water-skiing
you mayn't have been water-skiing
they mayn't have been water-skiing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I water-ski?
may you water-ski?
may he water-ski?
may we water-ski?
may you water-ski?
may they water-ski? 	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? 	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? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I water-ski?
mayn't you water-ski?
mayn't he water-ski?
mayn't we water-ski?
mayn't you water-ski?
mayn't they water-ski? 	mayn't I be water-skiing?
mayn't you be water-skiing?
mayn't he be water-skiing?
mayn't we be water-skiing?
mayn't you be water-skiing?
mayn't they be water-skiing? 	mayn't I have water-skied?
mayn't you have water-skied?
mayn't he have water-skied?
mayn't we have water-skied?
mayn't you have water-skied?
mayn't they have water-skied? 	mayn't I have been water-skiing?
mayn't you have been water-skiing?
mayn't he have been water-skiing?
mayn't we have been water-skiing?
mayn't you have been water-skiing?
mayn't they have been water-skiing?