should rival
Regular verb: rival - rivalled- rivalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd rival
you'd rival
she'd rival
we'd rival
you'd rival
they'd rival 	I'd be rivalling
you'd be rivalling
she'd be rivalling
we'd be rivalling
you'd be rivalling
they'd be rivalling	I should've rivalled
you should've rivalled
she should've rivalled
we should've rivalled
you should've rivalled
they should've rivalled	I should've been rivalling
you should've been rivalling
she should've been rivalling
we should've been rivalling
you should've been rivalling
they should've been rivalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't rival
you shouldn't rival
she shouldn't rival
we shouldn't rival
you shouldn't rival
they shouldn't rival 	I shouldn't be rivalling
you shouldn't be rivalling
she shouldn't be rivalling
we shouldn't be rivalling
you shouldn't be rivalling
they shouldn't be rivalling	I shouldn't have rivalled
you shouldn't have rivalled
she shouldn't have rivalled
we shouldn't have rivalled
you shouldn't have rivalled
they shouldn't have rivalled	I shouldn't have been rivalling
you shouldn't have been rivalling
she shouldn't have been rivalling
we shouldn't have been rivalling
you shouldn't have been rivalling
they shouldn't have been rivalling	

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

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