could fast-forward
Regular verb: fast-forward - fast-forwarded- fast-forwarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fast-forward
you could fast-forward
he could fast-forward
we could fast-forward
you could fast-forward
they could fast-forward 	I could be fast-forwarding
you could be fast-forwarding
he could be fast-forwarding
we could be fast-forwarding
you could be fast-forwarding
they could be fast-forwarding	I could have fast-forwarded
you could have fast-forwarded
he could have fast-forwarded
we could have fast-forwarded
you could have fast-forwarded
they could have fast-forwarded	I could have been fast-forwarding
you could have been fast-forwarding
he could have been fast-forwarding
we could have been fast-forwarding
you could have been fast-forwarding
they could have been fast-forwarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fast-forward
you couldn't fast-forward
he couldn't fast-forward
we couldn't fast-forward
you couldn't fast-forward
they couldn't fast-forward 	I couldn't be fast-forwarding
you couldn't be fast-forwarding
he couldn't be fast-forwarding
we couldn't be fast-forwarding
you couldn't be fast-forwarding
they couldn't be fast-forwarding	I couldn't have fast-forwarded
you couldn't have fast-forwarded
he couldn't have fast-forwarded
we couldn't have fast-forwarded
you couldn't have fast-forwarded
they couldn't have fast-forwarded	I couldn't have been fast-forwarding
you couldn't have been fast-forwarding
he couldn't have been fast-forwarding
we couldn't have been fast-forwarding
you couldn't have been fast-forwarding
they couldn't have been fast-forwarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fast-forward?
could you fast-forward?
could he fast-forward?
could we fast-forward?
could you fast-forward?
could they fast-forward? 	could I be fast-forwarding?
could you be fast-forwarding?
could he be fast-forwarding?
could we be fast-forwarding?
could you be fast-forwarding?
could they be fast-forwarding? 	could I have fast-forwarded?
could you have fast-forwarded?
could he have fast-forwarded?
could we have fast-forwarded?
could you have fast-forwarded?
could they have fast-forwarded? 	could I have been fast-forwarding?
could you have been fast-forwarding?
could he have been fast-forwarding?
could we have been fast-forwarding?
could you have been fast-forwarding?
could they have been fast-forwarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fast-forward?
couldn't you fast-forward?
couldn't he fast-forward?
couldn't we fast-forward?
couldn't you fast-forward?
couldn't they fast-forward? 	couldn't I be fast-forwarding?
couldn't you be fast-forwarding?
couldn't he be fast-forwarding?
couldn't we be fast-forwarding?
couldn't you be fast-forwarding?
couldn't they be fast-forwarding? 	couldn't I have fast-forwarded?
couldn't you have fast-forwarded?
couldn't he have fast-forwarded?
couldn't we have fast-forwarded?
couldn't you have fast-forwarded?
couldn't they have fast-forwarded? 	couldn't I have been fast-forwarding?
couldn't you have been fast-forwarding?
couldn't he have been fast-forwarding?
couldn't we have been fast-forwarding?
couldn't you have been fast-forwarding?
couldn't they have been fast-forwarding?