English verb conjugation
MUST SPAY

Regular verb: spay - spayed - spayed

Affirmation

Simple form	V-ing form
I must spay you must spay she must spay we must spay you must spay they must spay	I must be spaying you must be spaying she 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 she 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 she 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 mustn't spay you mustn't spay she mustn't spay we mustn't spay you mustn't spay they mustn't spay	I mustn't be spaying you mustn't be spaying she mustn't be spaying we mustn't be spaying you mustn't be spaying they mustn't be spaying
Perfect	V-ing perfect
I mustn't have spayed you mustn't have spayed she mustn't have spayed we mustn't have spayed you mustn't have spayed they mustn't have spayed	I mustn't have been spaying you mustn't have been spaying she mustn't have been spaying we mustn't have been spaying you mustn't have been spaying they mustn't have been spaying

Interrogative form

Simple form	V-ing form
must I spay? must you spay? must she spay? must we spay? must you spay? must they spay?	must I be spaying? must you be spaying? must she 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 she 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 she 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
mustn't I spay? mustn't you spay? mustn't she spay? mustn't we spay? mustn't you spay? mustn't they spay?	mustn't I be spaying? mustn't you be spaying? mustn't she be spaying? mustn't we be spaying? mustn't you be spaying? mustn't they be spaying?
Perfect	V-ing perfect
mustn't I have spayed? mustn't you have spayed? mustn't she have spayed? mustn't we have spayed? mustn't you have spayed? mustn't they have spayed?	mustn't I have been spaying? mustn't you have been spaying? mustn't she have been spaying? mustn't we have been spaying? mustn't you have been spaying? mustn't they have been spaying?