must growl
Verbo regular: growl - growled- growled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must growl
you must growl
he must growl
we must growl
you must growl
they must growl 	I must be growling
you must be growling
he must be growling
we must be growling
you must be growling
they must be growling	I must have growled
you must have growled
he must have growled
we must have growled
you must have growled
they must have growled	I must have been growling
you must have been growling
he must have been growling
we must have been growling
you must have been growling
they must have been growling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't growl
you mustn't growl
he mustn't growl
we mustn't growl
you mustn't growl
they mustn't growl 	I mustn't be growling
you mustn't be growling
he mustn't be growling
we mustn't be growling
you mustn't be growling
they mustn't be growling	I mustn't have growled
you mustn't have growled
he mustn't have growled
we mustn't have growled
you mustn't have growled
they mustn't have growled	I mustn't have been growling
you mustn't have been growling
he mustn't have been growling
we mustn't have been growling
you mustn't have been growling
they mustn't have been growling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I growl?
must you growl?
must he growl?
must we growl?
must you growl?
must they growl? 	must I be growling?
must you be growling?
must he be growling?
must we be growling?
must you be growling?
must they be growling? 	must I have growled?
must you have growled?
must he have growled?
must we have growled?
must you have growled?
must they have growled? 	must I have been growling?
must you have been growling?
must he have been growling?
must we have been growling?
must you have been growling?
must they have been growling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I growl?
mustn't you growl?
mustn't he growl?
mustn't we growl?
mustn't you growl?
mustn't they growl? 	mustn't I be growling?
mustn't you be growling?
mustn't he be growling?
mustn't we be growling?
mustn't you be growling?
mustn't they be growling? 	mustn't I have growled?
mustn't you have growled?
mustn't he have growled?
mustn't we have growled?
mustn't you have growled?
mustn't they have growled? 	mustn't I have been growling?
mustn't you have been growling?
mustn't he have been growling?
mustn't we have been growling?
mustn't you have been growling?
mustn't they have been growling?