must previsit
Verbo regular: previsit - previsited- previsited

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must previsit
you must previsit
he must previsit
we must previsit
you must previsit
they must previsit 	I must be previsiting
you must be previsiting
he must be previsiting
we must be previsiting
you must be previsiting
they must be previsiting	I must have previsited
you must have previsited
he must have previsited
we must have previsited
you must have previsited
they must have previsited	I must have been previsiting
you must have been previsiting
he must have been previsiting
we must have been previsiting
you must have been previsiting
they must have been previsiting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't previsit
you mustn't previsit
he mustn't previsit
we mustn't previsit
you mustn't previsit
they mustn't previsit 	I mustn't be previsiting
you mustn't be previsiting
he mustn't be previsiting
we mustn't be previsiting
you mustn't be previsiting
they mustn't be previsiting	I mustn't have previsited
you mustn't have previsited
he mustn't have previsited
we mustn't have previsited
you mustn't have previsited
they mustn't have previsited	I mustn't have been previsiting
you mustn't have been previsiting
he mustn't have been previsiting
we mustn't have been previsiting
you mustn't have been previsiting
they mustn't have been previsiting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I previsit?
must you previsit?
must he previsit?
must we previsit?
must you previsit?
must they previsit? 	must I be previsiting?
must you be previsiting?
must he be previsiting?
must we be previsiting?
must you be previsiting?
must they be previsiting? 	must I have previsited?
must you have previsited?
must he have previsited?
must we have previsited?
must you have previsited?
must they have previsited? 	must I have been previsiting?
must you have been previsiting?
must he have been previsiting?
must we have been previsiting?
must you have been previsiting?
must they have been previsiting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I previsit?
mustn't you previsit?
mustn't he previsit?
mustn't we previsit?
mustn't you previsit?
mustn't they previsit? 	mustn't I be previsiting?
mustn't you be previsiting?
mustn't he be previsiting?
mustn't we be previsiting?
mustn't you be previsiting?
mustn't they be previsiting? 	mustn't I have previsited?
mustn't you have previsited?
mustn't he have previsited?
mustn't we have previsited?
mustn't you have previsited?
mustn't they have previsited? 	mustn't I have been previsiting?
mustn't you have been previsiting?
mustn't he have been previsiting?
mustn't we have been previsiting?
mustn't you have been previsiting?
mustn't they have been previsiting?