could powwow
Regular verb: powwow - powwowed- powwowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could powwow
you could powwow
he could powwow
we could powwow
you could powwow
they could powwow 	I could be powwowing
you could be powwowing
he could be powwowing
we could be powwowing
you could be powwowing
they could be powwowing	I could have powwowed
you could have powwowed
he could have powwowed
we could have powwowed
you could have powwowed
they could have powwowed	I could have been powwowing
you could have been powwowing
he could have been powwowing
we could have been powwowing
you could have been powwowing
they could have been powwowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't powwow
you couldn't powwow
he couldn't powwow
we couldn't powwow
you couldn't powwow
they couldn't powwow 	I couldn't be powwowing
you couldn't be powwowing
he couldn't be powwowing
we couldn't be powwowing
you couldn't be powwowing
they couldn't be powwowing	I couldn't have powwowed
you couldn't have powwowed
he couldn't have powwowed
we couldn't have powwowed
you couldn't have powwowed
they couldn't have powwowed	I couldn't have been powwowing
you couldn't have been powwowing
he couldn't have been powwowing
we couldn't have been powwowing
you couldn't have been powwowing
they couldn't have been powwowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I powwow?
could you powwow?
could he powwow?
could we powwow?
could you powwow?
could they powwow? 	could I be powwowing?
could you be powwowing?
could he be powwowing?
could we be powwowing?
could you be powwowing?
could they be powwowing? 	could I have powwowed?
could you have powwowed?
could he have powwowed?
could we have powwowed?
could you have powwowed?
could they have powwowed? 	could I have been powwowing?
could you have been powwowing?
could he have been powwowing?
could we have been powwowing?
could you have been powwowing?
could they have been powwowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I powwow?
couldn't you powwow?
couldn't he powwow?
couldn't we powwow?
couldn't you powwow?
couldn't they powwow? 	couldn't I be powwowing?
couldn't you be powwowing?
couldn't he be powwowing?
couldn't we be powwowing?
couldn't you be powwowing?
couldn't they be powwowing? 	couldn't I have powwowed?
couldn't you have powwowed?
couldn't he have powwowed?
couldn't we have powwowed?
couldn't you have powwowed?
couldn't they have powwowed? 	couldn't I have been powwowing?
couldn't you have been powwowing?
couldn't he have been powwowing?
couldn't we have been powwowing?
couldn't you have been powwowing?
couldn't they have been powwowing?