may roller-skate
Regular verb: roller-skate - roller-skated- roller-skated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may roller-skate
you may roller-skate
she may roller-skate
we may roller-skate
you may roller-skate
they may roller-skate 	I may be roller-skating
you may be roller-skating
she may be roller-skating
we may be roller-skating
you may be roller-skating
they may be roller-skating	I may have roller-skated
you may have roller-skated
she may have roller-skated
we may have roller-skated
you may have roller-skated
they may have roller-skated	I may have been roller-skating
you may have been roller-skating
she may have been roller-skating
we may have been roller-skating
you may have been roller-skating
they may have been roller-skating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not roller-skate
you may not roller-skate
she may not roller-skate
we may not roller-skate
you may not roller-skate
they may not roller-skate 	I may not be roller-skating
you may not be roller-skating
she may not be roller-skating
we may not be roller-skating
you may not be roller-skating
they may not be roller-skating	I may not have roller-skated
you may not have roller-skated
she may not have roller-skated
we may not have roller-skated
you may not have roller-skated
they may not have roller-skated	I may not have been roller-skating
you may not have been roller-skating
she may not have been roller-skating
we may not have been roller-skating
you may not have been roller-skating
they may not have been roller-skating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I roller-skate?
may you roller-skate?
may she roller-skate?
may we roller-skate?
may you roller-skate?
may they roller-skate? 	may I be roller-skating?
may you be roller-skating?
may she be roller-skating?
may we be roller-skating?
may you be roller-skating?
may they be roller-skating? 	may I have roller-skated?
may you have roller-skated?
may she have roller-skated?
may we have roller-skated?
may you have roller-skated?
may they have roller-skated? 	may I have been roller-skating?
may you have been roller-skating?
may she have been roller-skating?
may we have been roller-skating?
may you have been roller-skating?
may they have been roller-skating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not roller-skate?
may you not roller-skate?
may she not roller-skate?
may we not roller-skate?
may you not roller-skate?
may they not roller-skate? 	may I not be roller-skating?
may you not be roller-skating?
may she not be roller-skating?
may we not be roller-skating?
may you not be roller-skating?
may they not be roller-skating? 	may I not have roller-skated?
may you not have roller-skated?
may she not have roller-skated?
may we not have roller-skated?
may you not have roller-skated?
may they not have roller-skated? 	may I not have been roller-skating?
may you not have been roller-skating?
may she not have been roller-skating?
may we not have been roller-skating?
may you not have been roller-skating?
may they not have been roller-skating?