must hay
Regular verb: hay - hayed- hayed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must hay
you must hay
he must hay
we must hay
you must hay
they must hay 	I must be haying
you must be haying
he must be haying
we must be haying
you must be haying
they must be haying	I must have hayed
you must have hayed
he must have hayed
we must have hayed
you must have hayed
they must have hayed	I must have been haying
you must have been haying
he must have been haying
we must have been haying
you must have been haying
they must have been haying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't hay
you mustn't hay
he mustn't hay
we mustn't hay
you mustn't hay
they mustn't hay 	I mustn't be haying
you mustn't be haying
he mustn't be haying
we mustn't be haying
you mustn't be haying
they mustn't be haying	I mustn't have hayed
you mustn't have hayed
he mustn't have hayed
we mustn't have hayed
you mustn't have hayed
they mustn't have hayed	I mustn't have been haying
you mustn't have been haying
he mustn't have been haying
we mustn't have been haying
you mustn't have been haying
they mustn't have been haying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I hay?
must you hay?
must he hay?
must we hay?
must you hay?
must they hay? 	must I be haying?
must you be haying?
must he be haying?
must we be haying?
must you be haying?
must they be haying? 	must I have hayed?
must you have hayed?
must he have hayed?
must we have hayed?
must you have hayed?
must they have hayed? 	must I have been haying?
must you have been haying?
must he have been haying?
must we have been haying?
must you have been haying?
must they have been haying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I hay?
mustn't you hay?
mustn't he hay?
mustn't we hay?
mustn't you hay?
mustn't they hay? 	mustn't I be haying?
mustn't you be haying?
mustn't he be haying?
mustn't we be haying?
mustn't you be haying?
mustn't they be haying? 	mustn't I have hayed?
mustn't you have hayed?
mustn't he have hayed?
mustn't we have hayed?
mustn't you have hayed?
mustn't they have hayed? 	mustn't I have been haying?
mustn't you have been haying?
mustn't he have been haying?
mustn't we have been haying?
mustn't you have been haying?
mustn't they have been haying?