could vet
Regular verb: vet - vetted- vetted

Affirmation 	
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I could vet
you could vet
she could vet
we could vet
you could vet
they could vet 	I could be vetting
you could be vetting
she could be vetting
we could be vetting
you could be vetting
they could be vetting	I could have vetted
you could have vetted
she 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
she could have been vetting
we could have been vetting
you could have been vetting
they could have been vetting	

Negation 	
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I couldn't vet
you couldn't vet
she couldn't vet
we couldn't vet
you couldn't vet
they couldn't vet 	I couldn't be vetting
you couldn't be vetting
she couldn't be vetting
we couldn't be vetting
you couldn't be vetting
they couldn't be vetting	I couldn't have vetted
you couldn't have vetted
she couldn't have vetted
we couldn't have vetted
you couldn't have vetted
they couldn't have vetted	I couldn't have been vetting
you couldn't have been vetting
she couldn't have been vetting
we couldn't have been vetting
you couldn't have been vetting
they couldn't have been vetting	

Interrogative form 	
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could I vet?
could you vet?
could she vet?
could we vet?
could you vet?
could they vet? 	could I be vetting?
could you be vetting?
could she be vetting?
could we be vetting?
could you be vetting?
could they be vetting? 	could I have vetted?
could you have vetted?
could she 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 she 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 	Perfect 	V-ing perfect 	
couldn't I vet?
couldn't you vet?
couldn't she vet?
couldn't we vet?
couldn't you vet?
couldn't they vet? 	couldn't I be vetting?
couldn't you be vetting?
couldn't she be vetting?
couldn't we be vetting?
couldn't you be vetting?
couldn't they be vetting? 	couldn't I have vetted?
couldn't you have vetted?
couldn't she have vetted?
couldn't we have vetted?
couldn't you have vetted?
couldn't they have vetted? 	couldn't I have been vetting?
couldn't you have been vetting?
couldn't she have been vetting?
couldn't we have been vetting?
couldn't you have been vetting?
couldn't they have been vetting?