could vamp
Regular verb: vamp - vamped- vamped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could vamp
you could vamp
he could vamp
we could vamp
you could vamp
they could vamp 	I could be vamping
you could be vamping
he could be vamping
we could be vamping
you could be vamping
they could be vamping	I could have vamped
you could have vamped
he could have vamped
we could have vamped
you could have vamped
they could have vamped	I could have been vamping
you could have been vamping
he could have been vamping
we could have been vamping
you could have been vamping
they could have been vamping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't vamp
you couldn't vamp
he couldn't vamp
we couldn't vamp
you couldn't vamp
they couldn't vamp 	I couldn't be vamping
you couldn't be vamping
he couldn't be vamping
we couldn't be vamping
you couldn't be vamping
they couldn't be vamping	I couldn't have vamped
you couldn't have vamped
he couldn't have vamped
we couldn't have vamped
you couldn't have vamped
they couldn't have vamped	I couldn't have been vamping
you couldn't have been vamping
he couldn't have been vamping
we couldn't have been vamping
you couldn't have been vamping
they couldn't have been vamping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I vamp?
could you vamp?
could he vamp?
could we vamp?
could you vamp?
could they vamp? 	could I be vamping?
could you be vamping?
could he be vamping?
could we be vamping?
could you be vamping?
could they be vamping? 	could I have vamped?
could you have vamped?
could he have vamped?
could we have vamped?
could you have vamped?
could they have vamped? 	could I have been vamping?
could you have been vamping?
could he have been vamping?
could we have been vamping?
could you have been vamping?
could they have been vamping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I vamp?
couldn't you vamp?
couldn't he vamp?
couldn't we vamp?
couldn't you vamp?
couldn't they vamp? 	couldn't I be vamping?
couldn't you be vamping?
couldn't he be vamping?
couldn't we be vamping?
couldn't you be vamping?
couldn't they be vamping? 	couldn't I have vamped?
couldn't you have vamped?
couldn't he have vamped?
couldn't we have vamped?
couldn't you have vamped?
couldn't they have vamped? 	couldn't I have been vamping?
couldn't you have been vamping?
couldn't he have been vamping?
couldn't we have been vamping?
couldn't you have been vamping?
couldn't they have been vamping?