must hay
Regular verb: hay - hayed- hayed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must hay
you must hay
she must hay
we must hay
you must hay
they must hay 	I must be haying
you must be haying
she must be haying
we must be haying
you must be haying
they must be haying	I must have hayed
you must have hayed
she 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
she 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 must not hay
you must not hay
she must not hay
we must not hay
you must not hay
they must not hay 	I must not be haying
you must not be haying
she must not be haying
we must not be haying
you must not be haying
they must not be haying	I must not have hayed
you must not have hayed
she must not have hayed
we must not have hayed
you must not have hayed
they must not have hayed	I must not have been haying
you must not have been haying
she must not have been haying
we must not have been haying
you must not have been haying
they must not have been haying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I hay?
must you hay?
must she hay?
must we hay?
must you hay?
must they hay? 	must I be haying?
must you be haying?
must she be haying?
must we be haying?
must you be haying?
must they be haying? 	must I have hayed?
must you have hayed?
must she 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 she 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 	
must I not hay?
must you not hay?
must she not hay?
must we not hay?
must you not hay?
must they not hay? 	must I not be haying?
must you not be haying?
must she not be haying?
must we not be haying?
must you not be haying?
must they not be haying? 	must I not have hayed?
must you not have hayed?
must she not have hayed?
must we not have hayed?
must you not have hayed?
must they not have hayed? 	must I not have been haying?
must you not have been haying?
must she not have been haying?
must we not have been haying?
must you not have been haying?
must they not have been haying?