may rival
Regular verb: rival - rivalled- rivalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may rival
you may rival
she may rival
we may rival
you may rival
they may rival 	I may be rivalling
you may be rivalling
she may be rivalling
we may be rivalling
you may be rivalling
they may be rivalling	I may have rivalled
you may have rivalled
she may have rivalled
we may have rivalled
you may have rivalled
they may have rivalled	I may have been rivalling
you may have been rivalling
she may have been rivalling
we may have been rivalling
you may have been rivalling
they may have been rivalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not rival
you may not rival
she may not rival
we may not rival
you may not rival
they may not rival 	I may not be rivalling
you may not be rivalling
she may not be rivalling
we may not be rivalling
you may not be rivalling
they may not be rivalling	I may not have rivalled
you may not have rivalled
she may not have rivalled
we may not have rivalled
you may not have rivalled
they may not have rivalled	I may not have been rivalling
you may not have been rivalling
she may not have been rivalling
we may not have been rivalling
you may not have been rivalling
they may not have been rivalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I rival?
may you rival?
may she rival?
may we rival?
may you rival?
may they rival? 	may I be rivalling?
may you be rivalling?
may she be rivalling?
may we be rivalling?
may you be rivalling?
may they be rivalling? 	may I have rivalled?
may you have rivalled?
may she have rivalled?
may we have rivalled?
may you have rivalled?
may they have rivalled? 	may I have been rivalling?
may you have been rivalling?
may she have been rivalling?
may we have been rivalling?
may you have been rivalling?
may they have been rivalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not rival?
may you not rival?
may she not rival?
may we not rival?
may you not rival?
may they not rival? 	may I not be rivalling?
may you not be rivalling?
may she not be rivalling?
may we not be rivalling?
may you not be rivalling?
may they not be rivalling? 	may I not have rivalled?
may you not have rivalled?
may she not have rivalled?
may we not have rivalled?
may you not have rivalled?
may they not have rivalled? 	may I not have been rivalling?
may you not have been rivalling?
may she not have been rivalling?
may we not have been rivalling?
may you not have been rivalling?
may they not have been rivalling?