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
she 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
she 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
she 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
she 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
she 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
she 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
she 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
she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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?