must birdie
Regular verb: birdie - birdied- birdied

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