English verb conjugation
MUST SPAY

Regular verb: spay - spayed - spayed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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