could rethread
Regular verb: rethread - rethreaded- rethreaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rethread
you could rethread
he could rethread
we could rethread
you could rethread
they could rethread 	I could be rethreading
you could be rethreading
he could be rethreading
we could be rethreading
you could be rethreading
they could be rethreading	I could have rethreaded
you could have rethreaded
he could have rethreaded
we could have rethreaded
you could have rethreaded
they could have rethreaded	I could have been rethreading
you could have been rethreading
he could have been rethreading
we could have been rethreading
you could have been rethreading
they could have been rethreading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rethread
you couldn't rethread
he couldn't rethread
we couldn't rethread
you couldn't rethread
they couldn't rethread 	I couldn't be rethreading
you couldn't be rethreading
he couldn't be rethreading
we couldn't be rethreading
you couldn't be rethreading
they couldn't be rethreading	I couldn't have rethreaded
you couldn't have rethreaded
he couldn't have rethreaded
we couldn't have rethreaded
you couldn't have rethreaded
they couldn't have rethreaded	I couldn't have been rethreading
you couldn't have been rethreading
he couldn't have been rethreading
we couldn't have been rethreading
you couldn't have been rethreading
they couldn't have been rethreading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rethread?
could you rethread?
could he rethread?
could we rethread?
could you rethread?
could they rethread? 	could I be rethreading?
could you be rethreading?
could he be rethreading?
could we be rethreading?
could you be rethreading?
could they be rethreading? 	could I have rethreaded?
could you have rethreaded?
could he have rethreaded?
could we have rethreaded?
could you have rethreaded?
could they have rethreaded? 	could I have been rethreading?
could you have been rethreading?
could he have been rethreading?
could we have been rethreading?
could you have been rethreading?
could they have been rethreading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rethread?
couldn't you rethread?
couldn't he rethread?
couldn't we rethread?
couldn't you rethread?
couldn't they rethread? 	couldn't I be rethreading?
couldn't you be rethreading?
couldn't he be rethreading?
couldn't we be rethreading?
couldn't you be rethreading?
couldn't they be rethreading? 	couldn't I have rethreaded?
couldn't you have rethreaded?
couldn't he have rethreaded?
couldn't we have rethreaded?
couldn't you have rethreaded?
couldn't they have rethreaded? 	couldn't I have been rethreading?
couldn't you have been rethreading?
couldn't he have been rethreading?
couldn't we have been rethreading?
couldn't you have been rethreading?
couldn't they have been rethreading?