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 couldn't spay you couldn't spay he couldn't spay we couldn't spay you couldn't spay they couldn't spay	I couldn't be spaying you couldn't be spaying he couldn't be spaying we couldn't be spaying you couldn't be spaying they couldn't be spaying
Perfect	V-ing perfect
I couldn't have spayed you couldn't have spayed he couldn't have spayed we couldn't have spayed you couldn't have spayed they couldn't have spayed	I couldn't have been spaying you couldn't have been spaying he couldn't have been spaying we couldn't have been spaying you couldn't have been spaying they couldn't 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
couldn't I spay? couldn't you spay? couldn't he spay? couldn't we spay? couldn't you spay? couldn't they spay?	couldn't I be spaying? couldn't you be spaying? couldn't he be spaying? couldn't we be spaying? couldn't you be spaying? couldn't they be spaying?
Perfect	V-ing perfect
couldn't I have spayed? couldn't you have spayed? couldn't he have spayed? couldn't we have spayed? couldn't you have spayed? couldn't they have spayed?	couldn't I have been spaying? couldn't you have been spaying? couldn't he have been spaying? couldn't we have been spaying? couldn't you have been spaying? couldn't they have been spaying?