English verb conjugation
SHOULD RIVAL

Regular verb: rival - rivalled - rivalled

Affirmation

Simple form	V-ing form
I'd rival you'd rival he'd rival we'd rival you'd rival they'd rival	I'd be rivalling you'd be rivalling he'd be rivalling we'd be rivalling you'd be rivalling they'd be rivalling
Perfect	V-ing perfect
I should've rivalled you should've rivalled he 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 he 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
I shouldn't rival you shouldn't rival he 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 he shouldn't be rivalling we shouldn't be rivalling you shouldn't be rivalling they shouldn't be rivalling
Perfect	V-ing perfect
I shouldn't have rivalled you shouldn't have rivalled he 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 he 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
should I rival? should you rival? should he rival? should we rival? should you rival? should they rival?	should I be rivalling? should you be rivalling? should he be rivalling? should we be rivalling? should you be rivalling? should they be rivalling?
Perfect	V-ing perfect
should I have rivalled? should you have rivalled? should he 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 he 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
shouldn't I rival? shouldn't you rival? shouldn't he 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 he be rivalling? shouldn't we be rivalling? shouldn't you be rivalling? shouldn't they be rivalling?
Perfect	V-ing perfect
shouldn't I have rivalled? shouldn't you have rivalled? shouldn't he 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 he have been rivalling? shouldn't we have been rivalling? shouldn't you have been rivalling? shouldn't they have been rivalling?