could nigh
Regular verb: nigh - nighed- nighed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nigh
you could nigh
he could nigh
we could nigh
you could nigh
they could nigh 	I could be nighing
you could be nighing
he could be nighing
we could be nighing
you could be nighing
they could be nighing	I could have nighed
you could have nighed
he could have nighed
we could have nighed
you could have nighed
they could have nighed	I could have been nighing
you could have been nighing
he could have been nighing
we could have been nighing
you could have been nighing
they could have been nighing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not nigh
you could not nigh
he could not nigh
we could not nigh
you could not nigh
they could not nigh 	I could not be nighing
you could not be nighing
he could not be nighing
we could not be nighing
you could not be nighing
they could not be nighing	I could not have nighed
you could not have nighed
he could not have nighed
we could not have nighed
you could not have nighed
they could not have nighed	I could not have been nighing
you could not have been nighing
he could not have been nighing
we could not have been nighing
you could not have been nighing
they could not have been nighing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nigh?
could you nigh?
could he nigh?
could we nigh?
could you nigh?
could they nigh? 	could I be nighing?
could you be nighing?
could he be nighing?
could we be nighing?
could you be nighing?
could they be nighing? 	could I have nighed?
could you have nighed?
could he have nighed?
could we have nighed?
could you have nighed?
could they have nighed? 	could I have been nighing?
could you have been nighing?
could he have been nighing?
could we have been nighing?
could you have been nighing?
could they have been nighing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not nigh?
could you not nigh?
could he not nigh?
could we not nigh?
could you not nigh?
could they not nigh? 	could I not be nighing?
could you not be nighing?
could he not be nighing?
could we not be nighing?
could you not be nighing?
could they not be nighing? 	could I not have nighed?
could you not have nighed?
could he not have nighed?
could we not have nighed?
could you not have nighed?
could they not have nighed? 	could I not have been nighing?
could you not have been nighing?
could he not have been nighing?
could we not have been nighing?
could you not have been nighing?
could they not have been nighing?