must pervade
Verbo regular: pervade - pervaded- pervaded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must pervade
you must pervade
he must pervade
we must pervade
you must pervade
they must pervade 	I must be pervading
you must be pervading
he must be pervading
we must be pervading
you must be pervading
they must be pervading	I must have pervaded
you must have pervaded
he must have pervaded
we must have pervaded
you must have pervaded
they must have pervaded	I must have been pervading
you must have been pervading
he must have been pervading
we must have been pervading
you must have been pervading
they must have been pervading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not pervade
you must not pervade
he must not pervade
we must not pervade
you must not pervade
they must not pervade 	I must not be pervading
you must not be pervading
he must not be pervading
we must not be pervading
you must not be pervading
they must not be pervading	I must not have pervaded
you must not have pervaded
he must not have pervaded
we must not have pervaded
you must not have pervaded
they must not have pervaded	I must not have been pervading
you must not have been pervading
he must not have been pervading
we must not have been pervading
you must not have been pervading
they must not have been pervading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I pervade?
must you pervade?
must he pervade?
must we pervade?
must you pervade?
must they pervade? 	must I be pervading?
must you be pervading?
must he be pervading?
must we be pervading?
must you be pervading?
must they be pervading? 	must I have pervaded?
must you have pervaded?
must he have pervaded?
must we have pervaded?
must you have pervaded?
must they have pervaded? 	must I have been pervading?
must you have been pervading?
must he have been pervading?
must we have been pervading?
must you have been pervading?
must they have been pervading? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not pervade?
must you not pervade?
must he not pervade?
must we not pervade?
must you not pervade?
must they not pervade? 	must I not be pervading?
must you not be pervading?
must he not be pervading?
must we not be pervading?
must you not be pervading?
must they not be pervading? 	must I not have pervaded?
must you not have pervaded?
must he not have pervaded?
must we not have pervaded?
must you not have pervaded?
must they not have pervaded? 	must I not have been pervading?
must you not have been pervading?
must he not have been pervading?
must we not have been pervading?
must you not have been pervading?
must they not have been pervading?