could chin
Regular verb: chin - chined- chined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chin
you could chin
he could chin
we could chin
you could chin
they could chin 	I could be chining
you could be chining
he could be chining
we could be chining
you could be chining
they could be chining	I could have chined
you could have chined
he could have chined
we could have chined
you could have chined
they could have chined	I could have been chining
you could have been chining
he could have been chining
we could have been chining
you could have been chining
they could have been chining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't chin
you couldn't chin
he couldn't chin
we couldn't chin
you couldn't chin
they couldn't chin 	I couldn't be chining
you couldn't be chining
he couldn't be chining
we couldn't be chining
you couldn't be chining
they couldn't be chining	I couldn't have chined
you couldn't have chined
he couldn't have chined
we couldn't have chined
you couldn't have chined
they couldn't have chined	I couldn't have been chining
you couldn't have been chining
he couldn't have been chining
we couldn't have been chining
you couldn't have been chining
they couldn't have been chining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chin?
could you chin?
could he chin?
could we chin?
could you chin?
could they chin? 	could I be chining?
could you be chining?
could he be chining?
could we be chining?
could you be chining?
could they be chining? 	could I have chined?
could you have chined?
could he have chined?
could we have chined?
could you have chined?
could they have chined? 	could I have been chining?
could you have been chining?
could he have been chining?
could we have been chining?
could you have been chining?
could they have been chining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I chin?
couldn't you chin?
couldn't he chin?
couldn't we chin?
couldn't you chin?
couldn't they chin? 	couldn't I be chining?
couldn't you be chining?
couldn't he be chining?
couldn't we be chining?
couldn't you be chining?
couldn't they be chining? 	couldn't I have chined?
couldn't you have chined?
couldn't he have chined?
couldn't we have chined?
couldn't you have chined?
couldn't they have chined? 	couldn't I have been chining?
couldn't you have been chining?
couldn't he have been chining?
couldn't we have been chining?
couldn't you have been chining?
couldn't they have been chining?