must moo
Verbo regular: moo - mooed- mooed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must moo
you must moo
he must moo
we must moo
you must moo
they must moo 	I must be mooing
you must be mooing
he must be mooing
we must be mooing
you must be mooing
they must be mooing	I must have mooed
you must have mooed
he must have mooed
we must have mooed
you must have mooed
they must have mooed	I must have been mooing
you must have been mooing
he must have been mooing
we must have been mooing
you must have been mooing
they must have been mooing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not moo
you must not moo
he must not moo
we must not moo
you must not moo
they must not moo 	I must not be mooing
you must not be mooing
he must not be mooing
we must not be mooing
you must not be mooing
they must not be mooing	I must not have mooed
you must not have mooed
he must not have mooed
we must not have mooed
you must not have mooed
they must not have mooed	I must not have been mooing
you must not have been mooing
he must not have been mooing
we must not have been mooing
you must not have been mooing
they must not have been mooing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I moo?
must you moo?
must he moo?
must we moo?
must you moo?
must they moo? 	must I be mooing?
must you be mooing?
must he be mooing?
must we be mooing?
must you be mooing?
must they be mooing? 	must I have mooed?
must you have mooed?
must he have mooed?
must we have mooed?
must you have mooed?
must they have mooed? 	must I have been mooing?
must you have been mooing?
must he have been mooing?
must we have been mooing?
must you have been mooing?
must they have been mooing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not moo?
must you not moo?
must he not moo?
must we not moo?
must you not moo?
must they not moo? 	must I not be mooing?
must you not be mooing?
must he not be mooing?
must we not be mooing?
must you not be mooing?
must they not be mooing? 	must I not have mooed?
must you not have mooed?
must he not have mooed?
must we not have mooed?
must you not have mooed?
must they not have mooed? 	must I not have been mooing?
must you not have been mooing?
must he not have been mooing?
must we not have been mooing?
must you not have been mooing?
must they not have been mooing?