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 couldn't double-knit
you couldn't double-knit
he couldn't double-knit
we couldn't double-knit
you couldn't double-knit
they couldn't double-knit 	I couldn't be double-kniting
you couldn't be double-kniting
he couldn't be double-kniting
we couldn't be double-kniting
you couldn't be double-kniting
they couldn't be double-kniting	I couldn't have double-knited
you couldn't have double-knited
he couldn't have double-knited
we couldn't have double-knited
you couldn't have double-knited
they couldn't have double-knited	I couldn't have been double-kniting
you couldn't have been double-kniting
he couldn't have been double-kniting
we couldn't have been double-kniting
you couldn't have been double-kniting
they couldn't 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 	
couldn't I double-knit?
couldn't you double-knit?
couldn't he double-knit?
couldn't we double-knit?
couldn't you double-knit?
couldn't they double-knit? 	couldn't I be double-kniting?
couldn't you be double-kniting?
couldn't he be double-kniting?
couldn't we be double-kniting?
couldn't you be double-kniting?
couldn't they be double-kniting? 	couldn't I have double-knited?
couldn't you have double-knited?
couldn't he have double-knited?
couldn't we have double-knited?
couldn't you have double-knited?
couldn't they have double-knited? 	couldn't I have been double-kniting?
couldn't you have been double-kniting?
couldn't he have been double-kniting?
couldn't we have been double-kniting?
couldn't you have been double-kniting?
couldn't they have been double-kniting?