English verb conjugation
COULD RIVE

Irregular verb: rive - rived - rived, riven

Affirmation

Simple form	V-ing form
I could rive you could rive he could rive we could rive you could rive they could rive	I could be riving you could be riving he could be riving we could be riving you could be riving they could be riving
Perfect	V-ing perfect
I could have rived, riven you could have rived, riven he could have rived, riven we could have rived, riven you could have rived, riven they could have rived, riven	I could have been riving you could have been riving he could have been riving we could have been riving you could have been riving they could have been riving

Negation

Simple form	V-ing form
I could not rive you could not rive he could not rive we could not rive you could not rive they could not rive	I could not be riving you could not be riving he could not be riving we could not be riving you could not be riving they could not be riving
Perfect	V-ing perfect
I could not have rived, riven you could not have rived, riven he could not have rived, riven we could not have rived, riven you could not have rived, riven they could not have rived, riven	I could not have been riving you could not have been riving he could not have been riving we could not have been riving you could not have been riving they could not have been riving

Interrogative form

Simple form	V-ing form
could I rive? could you rive? could he rive? could we rive? could you rive? could they rive?	could I be riving? could you be riving? could he be riving? could we be riving? could you be riving? could they be riving?
Perfect	V-ing perfect
could I have rived, riven? could you have rived, riven? could he have rived, riven? could we have rived, riven? could you have rived, riven? could they have rived, riven?	could I have been riving? could you have been riving? could he have been riving? could we have been riving? could you have been riving? could they have been riving?

Interro-negative form

Simple form	V-ing form
could I not rive? could you not rive? could he not rive? could we not rive? could you not rive? could they not rive?	could I not be riving? could you not be riving? could he not be riving? could we not be riving? could you not be riving? could they not be riving?
Perfect	V-ing perfect
could I not have rived, riven? could you not have rived, riven? could he not have rived, riven? could we not have rived, riven? could you not have rived, riven? could they not have rived, riven?	could I not have been riving? could you not have been riving? could he not have been riving? could we not have been riving? could you not have been riving? could they not have been riving?