could powder
Regular verb: powder - powdered- powdered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could powder
you could powder
he could powder
we could powder
you could powder
they could powder 	I could be powdering
you could be powdering
he could be powdering
we could be powdering
you could be powdering
they could be powdering	I could have powdered
you could have powdered
he could have powdered
we could have powdered
you could have powdered
they could have powdered	I could have been powdering
you could have been powdering
he could have been powdering
we could have been powdering
you could have been powdering
they could have been powdering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't powder
you couldn't powder
he couldn't powder
we couldn't powder
you couldn't powder
they couldn't powder 	I couldn't be powdering
you couldn't be powdering
he couldn't be powdering
we couldn't be powdering
you couldn't be powdering
they couldn't be powdering	I couldn't have powdered
you couldn't have powdered
he couldn't have powdered
we couldn't have powdered
you couldn't have powdered
they couldn't have powdered	I couldn't have been powdering
you couldn't have been powdering
he couldn't have been powdering
we couldn't have been powdering
you couldn't have been powdering
they couldn't have been powdering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I powder?
could you powder?
could he powder?
could we powder?
could you powder?
could they powder? 	could I be powdering?
could you be powdering?
could he be powdering?
could we be powdering?
could you be powdering?
could they be powdering? 	could I have powdered?
could you have powdered?
could he have powdered?
could we have powdered?
could you have powdered?
could they have powdered? 	could I have been powdering?
could you have been powdering?
could he have been powdering?
could we have been powdering?
could you have been powdering?
could they have been powdering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I powder?
couldn't you powder?
couldn't he powder?
couldn't we powder?
couldn't you powder?
couldn't they powder? 	couldn't I be powdering?
couldn't you be powdering?
couldn't he be powdering?
couldn't we be powdering?
couldn't you be powdering?
couldn't they be powdering? 	couldn't I have powdered?
couldn't you have powdered?
couldn't he have powdered?
couldn't we have powdered?
couldn't you have powdered?
couldn't they have powdered? 	couldn't I have been powdering?
couldn't you have been powdering?
couldn't he have been powdering?
couldn't we have been powdering?
couldn't you have been powdering?
couldn't they have been powdering?