could double-talk
Regular verb: double-talk - double-talked- double-talked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could double-talk
you could double-talk
he could double-talk
we could double-talk
you could double-talk
they could double-talk 	I could be double-talking
you could be double-talking
he could be double-talking
we could be double-talking
you could be double-talking
they could be double-talking	I could have double-talked
you could have double-talked
he could have double-talked
we could have double-talked
you could have double-talked
they could have double-talked	I could have been double-talking
you could have been double-talking
he could have been double-talking
we could have been double-talking
you could have been double-talking
they could have been double-talking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not double-talk
you could not double-talk
he could not double-talk
we could not double-talk
you could not double-talk
they could not double-talk 	I could not be double-talking
you could not be double-talking
he could not be double-talking
we could not be double-talking
you could not be double-talking
they could not be double-talking	I could not have double-talked
you could not have double-talked
he could not have double-talked
we could not have double-talked
you could not have double-talked
they could not have double-talked	I could not have been double-talking
you could not have been double-talking
he could not have been double-talking
we could not have been double-talking
you could not have been double-talking
they could not have been double-talking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I double-talk?
could you double-talk?
could he double-talk?
could we double-talk?
could you double-talk?
could they double-talk? 	could I be double-talking?
could you be double-talking?
could he be double-talking?
could we be double-talking?
could you be double-talking?
could they be double-talking? 	could I have double-talked?
could you have double-talked?
could he have double-talked?
could we have double-talked?
could you have double-talked?
could they have double-talked? 	could I have been double-talking?
could you have been double-talking?
could he have been double-talking?
could we have been double-talking?
could you have been double-talking?
could they have been double-talking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not double-talk?
could you not double-talk?
could he not double-talk?
could we not double-talk?
could you not double-talk?
could they not double-talk? 	could I not be double-talking?
could you not be double-talking?
could he not be double-talking?
could we not be double-talking?
could you not be double-talking?
could they not be double-talking? 	could I not have double-talked?
could you not have double-talked?
could he not have double-talked?
could we not have double-talked?
could you not have double-talked?
could they not have double-talked? 	could I not have been double-talking?
could you not have been double-talking?
could he not have been double-talking?
could we not have been double-talking?
could you not have been double-talking?
could they not have been double-talking?