can rival
Verbo regular: rival - rivalled- rivalled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can rival
you can rival
he can rival
we can rival
you can rival
they can rival 	I can be rivalling
you can be rivalling
he can be rivalling
we can be rivalling
you can be rivalling
they can be rivalling	I can have rivalled
you can have rivalled
he can have rivalled
we can have rivalled
you can have rivalled
they can have rivalled	I can have been rivalling
you can have been rivalling
he can have been rivalling
we can have been rivalling
you can have been rivalling
they can have been rivalling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot rival
you cannot rival
he cannot rival
we cannot rival
you cannot rival
they cannot rival 	I cannot be rivalling
you cannot be rivalling
he cannot be rivalling
we cannot be rivalling
you cannot be rivalling
they cannot be rivalling	I cannot have rivalled
you cannot have rivalled
he cannot have rivalled
we cannot have rivalled
you cannot have rivalled
they cannot have rivalled	I cannot have been rivalling
you cannot have been rivalling
he cannot have been rivalling
we cannot have been rivalling
you cannot have been rivalling
they cannot have been rivalling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I rival?
can you rival?
can he rival?
can we rival?
can you rival?
can they rival? 	can I be rivalling?
can you be rivalling?
can he be rivalling?
can we be rivalling?
can you be rivalling?
can they be rivalling? 	can I have rivalled?
can you have rivalled?
can he have rivalled?
can we have rivalled?
can you have rivalled?
can they have rivalled? 	can I have been rivalling?
can you have been rivalling?
can he have been rivalling?
can we have been rivalling?
can you have been rivalling?
can they have been rivalling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not rival?
can you not rival?
can he not rival?
can we not rival?
can you not rival?
can they not rival? 	can I not be rivalling?
can you not be rivalling?
can he not be rivalling?
can we not be rivalling?
can you not be rivalling?
can they not be rivalling? 	can I not have rivalled?
can you not have rivalled?
can he not have rivalled?
can we not have rivalled?
can you not have rivalled?
can they not have rivalled? 	can I not have been rivalling?
can you not have been rivalling?
can he not have been rivalling?
can we not have been rivalling?
can you not have been rivalling?
can they not have been rivalling?