English verb conjugation
COULD NIX

Regular verb: nix - nixed - nixed

Affirmation

Simple form	V-ing form
I could nix you could nix he could nix we could nix you could nix they could nix	I could be nixing you could be nixing he could be nixing we could be nixing you could be nixing they could be nixing
Perfect	V-ing perfect
I could have nixed you could have nixed he could have nixed we could have nixed you could have nixed they could have nixed	I could have been nixing you could have been nixing he could have been nixing we could have been nixing you could have been nixing they could have been nixing

Negation

Simple form	V-ing form
I could not nix you could not nix he could not nix we could not nix you could not nix they could not nix	I could not be nixing you could not be nixing he could not be nixing we could not be nixing you could not be nixing they could not be nixing
Perfect	V-ing perfect
I could not have nixed you could not have nixed he could not have nixed we could not have nixed you could not have nixed they could not have nixed	I could not have been nixing you could not have been nixing he could not have been nixing we could not have been nixing you could not have been nixing they could not have been nixing

Interrogative form

Simple form	V-ing form
could I nix? could you nix? could he nix? could we nix? could you nix? could they nix?	could I be nixing? could you be nixing? could he be nixing? could we be nixing? could you be nixing? could they be nixing?
Perfect	V-ing perfect
could I have nixed? could you have nixed? could he have nixed? could we have nixed? could you have nixed? could they have nixed?	could I have been nixing? could you have been nixing? could he have been nixing? could we have been nixing? could you have been nixing? could they have been nixing?

Interro-negative form

Simple form	V-ing form
could I not nix? could you not nix? could he not nix? could we not nix? could you not nix? could they not nix?	could I not be nixing? could you not be nixing? could he not be nixing? could we not be nixing? could you not be nixing? could they not be nixing?
Perfect	V-ing perfect
could I not have nixed? could you not have nixed? could he not have nixed? could we not have nixed? could you not have nixed? could they not have nixed?	could I not have been nixing? could you not have been nixing? could he not have been nixing? could we not have been nixing? could you not have been nixing? could they not have been nixing?