could double-knit
Regular verb: double-knit - double-knited- double-knited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could double-knit
you could double-knit
he could double-knit
we could double-knit
you could double-knit
they could double-knit 	I could be double-kniting
you could be double-kniting
he could be double-kniting
we could be double-kniting
you could be double-kniting
they could be double-kniting	I could have double-knited
you could have double-knited
he could have double-knited
we could have double-knited
you could have double-knited
they could have double-knited	I could have been double-kniting
you could have been double-kniting
he could have been double-kniting
we could have been double-kniting
you could have been double-kniting
they could have been double-kniting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not double-knit
you could not double-knit
he could not double-knit
we could not double-knit
you could not double-knit
they could not double-knit 	I could not be double-kniting
you could not be double-kniting
he could not be double-kniting
we could not be double-kniting
you could not be double-kniting
they could not be double-kniting	I could not have double-knited
you could not have double-knited
he could not have double-knited
we could not have double-knited
you could not have double-knited
they could not have double-knited	I could not have been double-kniting
you could not have been double-kniting
he could not have been double-kniting
we could not have been double-kniting
you could not have been double-kniting
they could not have been double-kniting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I double-knit?
could you double-knit?
could he double-knit?
could we double-knit?
could you double-knit?
could they double-knit? 	could I be double-kniting?
could you be double-kniting?
could he be double-kniting?
could we be double-kniting?
could you be double-kniting?
could they be double-kniting? 	could I have double-knited?
could you have double-knited?
could he have double-knited?
could we have double-knited?
could you have double-knited?
could they have double-knited? 	could I have been double-kniting?
could you have been double-kniting?
could he have been double-kniting?
could we have been double-kniting?
could you have been double-kniting?
could they have been double-kniting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not double-knit?
could you not double-knit?
could he not double-knit?
could we not double-knit?
could you not double-knit?
could they not double-knit? 	could I not be double-kniting?
could you not be double-kniting?
could he not be double-kniting?
could we not be double-kniting?
could you not be double-kniting?
could they not be double-kniting? 	could I not have double-knited?
could you not have double-knited?
could he not have double-knited?
could we not have double-knited?
could you not have double-knited?
could they not have double-knited? 	could I not have been double-kniting?
could you not have been double-kniting?
could he not have been double-kniting?
could we not have been double-kniting?
could you not have been double-kniting?
could they not have been double-kniting?