English verb conjugation
COULD SPAY

Regular verb: spay - spayed - spayed

Affirmation

Simple form	V-ing form
I could spay you could spay he could spay we could spay you could spay they could spay	I could be spaying you could be spaying he could be spaying we could be spaying you could be spaying they could be spaying
Perfect	V-ing perfect
I could have spayed you could have spayed he could have spayed we could have spayed you could have spayed they could have spayed	I could have been spaying you could have been spaying he could have been spaying we could have been spaying you could have been spaying they could have been spaying

Negation

Simple form	V-ing form
I could not spay you could not spay he could not spay we could not spay you could not spay they could not spay	I could not be spaying you could not be spaying he could not be spaying we could not be spaying you could not be spaying they could not be spaying
Perfect	V-ing perfect
I could not have spayed you could not have spayed he could not have spayed we could not have spayed you could not have spayed they could not have spayed	I could not have been spaying you could not have been spaying he could not have been spaying we could not have been spaying you could not have been spaying they could not have been spaying

Interrogative form

Simple form	V-ing form
could I spay? could you spay? could he spay? could we spay? could you spay? could they spay?	could I be spaying? could you be spaying? could he be spaying? could we be spaying? could you be spaying? could they be spaying?
Perfect	V-ing perfect
could I have spayed? could you have spayed? could he have spayed? could we have spayed? could you have spayed? could they have spayed?	could I have been spaying? could you have been spaying? could he have been spaying? could we have been spaying? could you have been spaying? could they have been spaying?

Interro-negative form

Simple form	V-ing form
could I not spay? could you not spay? could he not spay? could we not spay? could you not spay? could they not spay?	could I not be spaying? could you not be spaying? could he not be spaying? could we not be spaying? could you not be spaying? could they not be spaying?
Perfect	V-ing perfect
could I not have spayed? could you not have spayed? could he not have spayed? could we not have spayed? could you not have spayed? could they not have spayed?	could I not have been spaying? could you not have been spaying? could he not have been spaying? could we not have been spaying? could you not have been spaying? could they not have been spaying?