could nill
Regular verb: nill - nilled- nilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nill
you could nill
she could nill
we could nill
you could nill
they could nill 	I could be nilling
you could be nilling
she could be nilling
we could be nilling
you could be nilling
they could be nilling	I could have nilled
you could have nilled
she could have nilled
we could have nilled
you could have nilled
they could have nilled	I could have been nilling
you could have been nilling
she could have been nilling
we could have been nilling
you could have been nilling
they could have been nilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not nill
you could not nill
she could not nill
we could not nill
you could not nill
they could not nill 	I could not be nilling
you could not be nilling
she could not be nilling
we could not be nilling
you could not be nilling
they could not be nilling	I could not have nilled
you could not have nilled
she could not have nilled
we could not have nilled
you could not have nilled
they could not have nilled	I could not have been nilling
you could not have been nilling
she could not have been nilling
we could not have been nilling
you could not have been nilling
they could not have been nilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nill?
could you nill?
could she nill?
could we nill?
could you nill?
could they nill? 	could I be nilling?
could you be nilling?
could she be nilling?
could we be nilling?
could you be nilling?
could they be nilling? 	could I have nilled?
could you have nilled?
could she have nilled?
could we have nilled?
could you have nilled?
could they have nilled? 	could I have been nilling?
could you have been nilling?
could she have been nilling?
could we have been nilling?
could you have been nilling?
could they have been nilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not nill?
could you not nill?
could she not nill?
could we not nill?
could you not nill?
could they not nill? 	could I not be nilling?
could you not be nilling?
could she not be nilling?
could we not be nilling?
could you not be nilling?
could they not be nilling? 	could I not have nilled?
could you not have nilled?
could she not have nilled?
could we not have nilled?
could you not have nilled?
could they not have nilled? 	could I not have been nilling?
could you not have been nilling?
could she not have been nilling?
could we not have been nilling?
could you not have been nilling?
could they not have been nilling?