could backcomb
Regular verb: backcomb - backcombed- backcombed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could backcomb
you could backcomb
he could backcomb
we could backcomb
you could backcomb
they could backcomb 	I could be backcombing
you could be backcombing
he could be backcombing
we could be backcombing
you could be backcombing
they could be backcombing	I could have backcombed
you could have backcombed
he could have backcombed
we could have backcombed
you could have backcombed
they could have backcombed	I could have been backcombing
you could have been backcombing
he could have been backcombing
we could have been backcombing
you could have been backcombing
they could have been backcombing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't backcomb
you couldn't backcomb
he couldn't backcomb
we couldn't backcomb
you couldn't backcomb
they couldn't backcomb 	I couldn't be backcombing
you couldn't be backcombing
he couldn't be backcombing
we couldn't be backcombing
you couldn't be backcombing
they couldn't be backcombing	I couldn't have backcombed
you couldn't have backcombed
he couldn't have backcombed
we couldn't have backcombed
you couldn't have backcombed
they couldn't have backcombed	I couldn't have been backcombing
you couldn't have been backcombing
he couldn't have been backcombing
we couldn't have been backcombing
you couldn't have been backcombing
they couldn't have been backcombing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I backcomb?
could you backcomb?
could he backcomb?
could we backcomb?
could you backcomb?
could they backcomb? 	could I be backcombing?
could you be backcombing?
could he be backcombing?
could we be backcombing?
could you be backcombing?
could they be backcombing? 	could I have backcombed?
could you have backcombed?
could he have backcombed?
could we have backcombed?
could you have backcombed?
could they have backcombed? 	could I have been backcombing?
could you have been backcombing?
could he have been backcombing?
could we have been backcombing?
could you have been backcombing?
could they have been backcombing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I backcomb?
couldn't you backcomb?
couldn't he backcomb?
couldn't we backcomb?
couldn't you backcomb?
couldn't they backcomb? 	couldn't I be backcombing?
couldn't you be backcombing?
couldn't he be backcombing?
couldn't we be backcombing?
couldn't you be backcombing?
couldn't they be backcombing? 	couldn't I have backcombed?
couldn't you have backcombed?
couldn't he have backcombed?
couldn't we have backcombed?
couldn't you have backcombed?
couldn't they have backcombed? 	couldn't I have been backcombing?
couldn't you have been backcombing?
couldn't he have been backcombing?
couldn't we have been backcombing?
couldn't you have been backcombing?
couldn't they have been backcombing?