may skateboard
Regular verb: skateboard - skateboarded- skateboarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may skateboard
you may skateboard
he may skateboard
we may skateboard
you may skateboard
they may skateboard 	I may be skateboarding
you may be skateboarding
he may be skateboarding
we may be skateboarding
you may be skateboarding
they may be skateboarding	I may have skateboarded
you may have skateboarded
he may have skateboarded
we may have skateboarded
you may have skateboarded
they may have skateboarded	I may have been skateboarding
you may have been skateboarding
he may have been skateboarding
we may have been skateboarding
you may have been skateboarding
they may have been skateboarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't skateboard
you mayn't skateboard
he mayn't skateboard
we mayn't skateboard
you mayn't skateboard
they mayn't skateboard 	I mayn't be skateboarding
you mayn't be skateboarding
he mayn't be skateboarding
we mayn't be skateboarding
you mayn't be skateboarding
they mayn't be skateboarding	I mayn't have skateboarded
you mayn't have skateboarded
he mayn't have skateboarded
we mayn't have skateboarded
you mayn't have skateboarded
they mayn't have skateboarded	I mayn't have been skateboarding
you mayn't have been skateboarding
he mayn't have been skateboarding
we mayn't have been skateboarding
you mayn't have been skateboarding
they mayn't have been skateboarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I skateboard?
may you skateboard?
may he skateboard?
may we skateboard?
may you skateboard?
may they skateboard? 	may I be skateboarding?
may you be skateboarding?
may he be skateboarding?
may we be skateboarding?
may you be skateboarding?
may they be skateboarding? 	may I have skateboarded?
may you have skateboarded?
may he have skateboarded?
may we have skateboarded?
may you have skateboarded?
may they have skateboarded? 	may I have been skateboarding?
may you have been skateboarding?
may he have been skateboarding?
may we have been skateboarding?
may you have been skateboarding?
may they have been skateboarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I skateboard?
mayn't you skateboard?
mayn't he skateboard?
mayn't we skateboard?
mayn't you skateboard?
mayn't they skateboard? 	mayn't I be skateboarding?
mayn't you be skateboarding?
mayn't he be skateboarding?
mayn't we be skateboarding?
mayn't you be skateboarding?
mayn't they be skateboarding? 	mayn't I have skateboarded?
mayn't you have skateboarded?
mayn't he have skateboarded?
mayn't we have skateboarded?
mayn't you have skateboarded?
mayn't they have skateboarded? 	mayn't I have been skateboarding?
mayn't you have been skateboarding?
mayn't he have been skateboarding?
mayn't we have been skateboarding?
mayn't you have been skateboarding?
mayn't they have been skateboarding?