could chain
Regular verb: chain - chained- chained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chain
you could chain
he could chain
we could chain
you could chain
they could chain 	I could be chaining
you could be chaining
he could be chaining
we could be chaining
you could be chaining
they could be chaining	I could have chained
you could have chained
he could have chained
we could have chained
you could have chained
they could have chained	I could have been chaining
you could have been chaining
he could have been chaining
we could have been chaining
you could have been chaining
they could have been chaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't chain
you couldn't chain
he couldn't chain
we couldn't chain
you couldn't chain
they couldn't chain 	I couldn't be chaining
you couldn't be chaining
he couldn't be chaining
we couldn't be chaining
you couldn't be chaining
they couldn't be chaining	I couldn't have chained
you couldn't have chained
he couldn't have chained
we couldn't have chained
you couldn't have chained
they couldn't have chained	I couldn't have been chaining
you couldn't have been chaining
he couldn't have been chaining
we couldn't have been chaining
you couldn't have been chaining
they couldn't have been chaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chain?
could you chain?
could he chain?
could we chain?
could you chain?
could they chain? 	could I be chaining?
could you be chaining?
could he be chaining?
could we be chaining?
could you be chaining?
could they be chaining? 	could I have chained?
could you have chained?
could he have chained?
could we have chained?
could you have chained?
could they have chained? 	could I have been chaining?
could you have been chaining?
could he have been chaining?
could we have been chaining?
could you have been chaining?
could they have been chaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I chain?
couldn't you chain?
couldn't he chain?
couldn't we chain?
couldn't you chain?
couldn't they chain? 	couldn't I be chaining?
couldn't you be chaining?
couldn't he be chaining?
couldn't we be chaining?
couldn't you be chaining?
couldn't they be chaining? 	couldn't I have chained?
couldn't you have chained?
couldn't he have chained?
couldn't we have chained?
couldn't you have chained?
couldn't they have chained? 	couldn't I have been chaining?
couldn't you have been chaining?
couldn't he have been chaining?
couldn't we have been chaining?
couldn't you have been chaining?
couldn't they have been chaining?