English verb conjugation
MUST BIRDIE

Regular verb: birdie - birdied - birdied

Affirmation

Simple form	V-ing form
I must birdie you must birdie she must birdie we must birdie you must birdie they must birdie	I must be birdying you must be birdying she must be birdying we must be birdying you must be birdying they must be birdying
Perfect	V-ing perfect
I must have birdied you must have birdied she must have birdied we must have birdied you must have birdied they must have birdied	I must have been birdying you must have been birdying she must have been birdying we must have been birdying you must have been birdying they must have been birdying

Negation

Simple form	V-ing form
I mustn't birdie you mustn't birdie she mustn't birdie we mustn't birdie you mustn't birdie they mustn't birdie	I mustn't be birdying you mustn't be birdying she mustn't be birdying we mustn't be birdying you mustn't be birdying they mustn't be birdying
Perfect	V-ing perfect
I mustn't have birdied you mustn't have birdied she mustn't have birdied we mustn't have birdied you mustn't have birdied they mustn't have birdied	I mustn't have been birdying you mustn't have been birdying she mustn't have been birdying we mustn't have been birdying you mustn't have been birdying they mustn't have been birdying

Interrogative form

Simple form	V-ing form
must I birdie? must you birdie? must she birdie? must we birdie? must you birdie? must they birdie?	must I be birdying? must you be birdying? must she be birdying? must we be birdying? must you be birdying? must they be birdying?
Perfect	V-ing perfect
must I have birdied? must you have birdied? must she have birdied? must we have birdied? must you have birdied? must they have birdied?	must I have been birdying? must you have been birdying? must she have been birdying? must we have been birdying? must you have been birdying? must they have been birdying?

Interro-negative form

Simple form	V-ing form
mustn't I birdie? mustn't you birdie? mustn't she birdie? mustn't we birdie? mustn't you birdie? mustn't they birdie?	mustn't I be birdying? mustn't you be birdying? mustn't she be birdying? mustn't we be birdying? mustn't you be birdying? mustn't they be birdying?
Perfect	V-ing perfect
mustn't I have birdied? mustn't you have birdied? mustn't she have birdied? mustn't we have birdied? mustn't you have birdied? mustn't they have birdied?	mustn't I have been birdying? mustn't you have been birdying? mustn't she have been birdying? mustn't we have been birdying? mustn't you have been birdying? mustn't they have been birdying?