English verb conjugation
COULD VET

Regular verb: vet - vetted - vetted

Affirmation

Simple form	V-ing form
I could vet you could vet he could vet we could vet you could vet they could vet	I could be vetting you could be vetting he could be vetting we could be vetting you could be vetting they could be vetting
Perfect	V-ing perfect
I could have vetted you could have vetted he could have vetted we could have vetted you could have vetted they could have vetted	I could have been vetting you could have been vetting he could have been vetting we could have been vetting you could have been vetting they could have been vetting

Negation

Simple form	V-ing form
I could not vet you could not vet he could not vet we could not vet you could not vet they could not vet	I could not be vetting you could not be vetting he could not be vetting we could not be vetting you could not be vetting they could not be vetting
Perfect	V-ing perfect
I could not have vetted you could not have vetted he could not have vetted we could not have vetted you could not have vetted they could not have vetted	I could not have been vetting you could not have been vetting he could not have been vetting we could not have been vetting you could not have been vetting they could not have been vetting

Interrogative form

Simple form	V-ing form
could I vet? could you vet? could he vet? could we vet? could you vet? could they vet?	could I be vetting? could you be vetting? could he be vetting? could we be vetting? could you be vetting? could they be vetting?
Perfect	V-ing perfect
could I have vetted? could you have vetted? could he have vetted? could we have vetted? could you have vetted? could they have vetted?	could I have been vetting? could you have been vetting? could he have been vetting? could we have been vetting? could you have been vetting? could they have been vetting?

Interro-negative form

Simple form	V-ing form
could I not vet? could you not vet? could he not vet? could we not vet? could you not vet? could they not vet?	could I not be vetting? could you not be vetting? could he not be vetting? could we not be vetting? could you not be vetting? could they not be vetting?
Perfect	V-ing perfect
could I not have vetted? could you not have vetted? could he not have vetted? could we not have vetted? could you not have vetted? could they not have vetted?	could I not have been vetting? could you not have been vetting? could he not have been vetting? could we not have been vetting? could you not have been vetting? could they not have been vetting?