English verb conjugation
COULD NIGH

Regular verb: nigh - nighed - nighed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?