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 couldn't rive you couldn't rive he couldn't rive we couldn't rive you couldn't rive they couldn't rive	I couldn't be riving you couldn't be riving he couldn't be riving we couldn't be riving you couldn't be riving they couldn't be riving
Perfect	V-ing perfect
I couldn't have rived, riven you couldn't have rived, riven he couldn't have rived, riven we couldn't have rived, riven you couldn't have rived, riven they couldn't have rived, riven	I couldn't have been riving you couldn't have been riving he couldn't have been riving we couldn't have been riving you couldn't have been riving they couldn't 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
couldn't I rive? couldn't you rive? couldn't he rive? couldn't we rive? couldn't you rive? couldn't they rive?	couldn't I be riving? couldn't you be riving? couldn't he be riving? couldn't we be riving? couldn't you be riving? couldn't they be riving?
Perfect	V-ing perfect
couldn't I have rived, riven? couldn't you have rived, riven? couldn't he have rived, riven? couldn't we have rived, riven? couldn't you have rived, riven? couldn't they have rived, riven?	couldn't I have been riving? couldn't you have been riving? couldn't he have been riving? couldn't we have been riving? couldn't you have been riving? couldn't they have been riving?