could natter
Regular verb: natter - nattered- nattered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could natter
you could natter
he could natter
we could natter
you could natter
they could natter 	I could be nattering
you could be nattering
he could be nattering
we could be nattering
you could be nattering
they could be nattering	I could have nattered
you could have nattered
he could have nattered
we could have nattered
you could have nattered
they could have nattered	I could have been nattering
you could have been nattering
he could have been nattering
we could have been nattering
you could have been nattering
they could have been nattering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not natter
you could not natter
he could not natter
we could not natter
you could not natter
they could not natter 	I could not be nattering
you could not be nattering
he could not be nattering
we could not be nattering
you could not be nattering
they could not be nattering	I could not have nattered
you could not have nattered
he could not have nattered
we could not have nattered
you could not have nattered
they could not have nattered	I could not have been nattering
you could not have been nattering
he could not have been nattering
we could not have been nattering
you could not have been nattering
they could not have been nattering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I natter?
could you natter?
could he natter?
could we natter?
could you natter?
could they natter? 	could I be nattering?
could you be nattering?
could he be nattering?
could we be nattering?
could you be nattering?
could they be nattering? 	could I have nattered?
could you have nattered?
could he have nattered?
could we have nattered?
could you have nattered?
could they have nattered? 	could I have been nattering?
could you have been nattering?
could he have been nattering?
could we have been nattering?
could you have been nattering?
could they have been nattering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not natter?
could you not natter?
could he not natter?
could we not natter?
could you not natter?
could they not natter? 	could I not be nattering?
could you not be nattering?
could he not be nattering?
could we not be nattering?
could you not be nattering?
could they not be nattering? 	could I not have nattered?
could you not have nattered?
could he not have nattered?
could we not have nattered?
could you not have nattered?
could they not have nattered? 	could I not have been nattering?
could you not have been nattering?
could he not have been nattering?
could we not have been nattering?
could you not have been nattering?
could they not have been nattering?