must frock
Verbo regular: frock - frocked- frocked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must frock
you must frock
he must frock
we must frock
you must frock
they must frock 	I must be frocking
you must be frocking
he must be frocking
we must be frocking
you must be frocking
they must be frocking	I must have frocked
you must have frocked
he must have frocked
we must have frocked
you must have frocked
they must have frocked	I must have been frocking
you must have been frocking
he must have been frocking
we must have been frocking
you must have been frocking
they must have been frocking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't frock
you mustn't frock
he mustn't frock
we mustn't frock
you mustn't frock
they mustn't frock 	I mustn't be frocking
you mustn't be frocking
he mustn't be frocking
we mustn't be frocking
you mustn't be frocking
they mustn't be frocking	I mustn't have frocked
you mustn't have frocked
he mustn't have frocked
we mustn't have frocked
you mustn't have frocked
they mustn't have frocked	I mustn't have been frocking
you mustn't have been frocking
he mustn't have been frocking
we mustn't have been frocking
you mustn't have been frocking
they mustn't have been frocking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I frock?
must you frock?
must he frock?
must we frock?
must you frock?
must they frock? 	must I be frocking?
must you be frocking?
must he be frocking?
must we be frocking?
must you be frocking?
must they be frocking? 	must I have frocked?
must you have frocked?
must he have frocked?
must we have frocked?
must you have frocked?
must they have frocked? 	must I have been frocking?
must you have been frocking?
must he have been frocking?
must we have been frocking?
must you have been frocking?
must they have been frocking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I frock?
mustn't you frock?
mustn't he frock?
mustn't we frock?
mustn't you frock?
mustn't they frock? 	mustn't I be frocking?
mustn't you be frocking?
mustn't he be frocking?
mustn't we be frocking?
mustn't you be frocking?
mustn't they be frocking? 	mustn't I have frocked?
mustn't you have frocked?
mustn't he have frocked?
mustn't we have frocked?
mustn't you have frocked?
mustn't they have frocked? 	mustn't I have been frocking?
mustn't you have been frocking?
mustn't he have been frocking?
mustn't we have been frocking?
mustn't you have been frocking?
mustn't they have been frocking?