English verb conjugation
COULD RIVAL

Regular verb: rival - rivalled - rivalled

Affirmation

Simple form	V-ing form
I could rival you could rival he could rival we could rival you could rival they could rival	I could be rivalling you could be rivalling he could be rivalling we could be rivalling you could be rivalling they could be rivalling
Perfect	V-ing perfect
I could have rivalled you could have rivalled he could have rivalled we could have rivalled you could have rivalled they could have rivalled	I could have been rivalling you could have been rivalling he could have been rivalling we could have been rivalling you could have been rivalling they could have been rivalling

Negation

Simple form	V-ing form
I could not rival you could not rival he could not rival we could not rival you could not rival they could not rival	I could not be rivalling you could not be rivalling he could not be rivalling we could not be rivalling you could not be rivalling they could not be rivalling
Perfect	V-ing perfect
I could not have rivalled you could not have rivalled he could not have rivalled we could not have rivalled you could not have rivalled they could not have rivalled	I could not have been rivalling you could not have been rivalling he could not have been rivalling we could not have been rivalling you could not have been rivalling they could not have been rivalling

Interrogative form

Simple form	V-ing form
could I rival? could you rival? could he rival? could we rival? could you rival? could they rival?	could I be rivalling? could you be rivalling? could he be rivalling? could we be rivalling? could you be rivalling? could they be rivalling?
Perfect	V-ing perfect
could I have rivalled? could you have rivalled? could he have rivalled? could we have rivalled? could you have rivalled? could they have rivalled?	could I have been rivalling? could you have been rivalling? could he have been rivalling? could we have been rivalling? could you have been rivalling? could they have been rivalling?

Interro-negative form

Simple form	V-ing form
could I not rival? could you not rival? could he not rival? could we not rival? could you not rival? could they not rival?	could I not be rivalling? could you not be rivalling? could he not be rivalling? could we not be rivalling? could you not be rivalling? could they not be rivalling?
Perfect	V-ing perfect
could I not have rivalled? could you not have rivalled? could he not have rivalled? could we not have rivalled? could you not have rivalled? could they not have rivalled?	could I not have been rivalling? could you not have been rivalling? could he not have been rivalling? could we not have been rivalling? could you not have been rivalling? could they not have been rivalling?