must pervade
Regular verb: pervade - pervaded- pervaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pervade
you must pervade
she must pervade
we must pervade
you must pervade
they must pervade 	I must be pervading
you must be pervading
she must be pervading
we must be pervading
you must be pervading
they must be pervading	I must have pervaded
you must have pervaded
she 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
she must have been pervading
we must have been pervading
you must have been pervading
they must have been pervading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pervade
you mustn't pervade
she mustn't pervade
we mustn't pervade
you mustn't pervade
they mustn't pervade 	I mustn't be pervading
you mustn't be pervading
she mustn't be pervading
we mustn't be pervading
you mustn't be pervading
they mustn't be pervading	I mustn't have pervaded
you mustn't have pervaded
she mustn't have pervaded
we mustn't have pervaded
you mustn't have pervaded
they mustn't have pervaded	I mustn't have been pervading
you mustn't have been pervading
she mustn't have been pervading
we mustn't have been pervading
you mustn't have been pervading
they mustn't have been pervading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pervade?
must you pervade?
must she pervade?
must we pervade?
must you pervade?
must they pervade? 	must I be pervading?
must you be pervading?
must she be pervading?
must we be pervading?
must you be pervading?
must they be pervading? 	must I have pervaded?
must you have pervaded?
must she 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 she have been pervading?
must we have been pervading?
must you have been pervading?
must they have been pervading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pervade?
mustn't you pervade?
mustn't she pervade?
mustn't we pervade?
mustn't you pervade?
mustn't they pervade? 	mustn't I be pervading?
mustn't you be pervading?
mustn't she be pervading?
mustn't we be pervading?
mustn't you be pervading?
mustn't they be pervading? 	mustn't I have pervaded?
mustn't you have pervaded?
mustn't she have pervaded?
mustn't we have pervaded?
mustn't you have pervaded?
mustn't they have pervaded? 	mustn't I have been pervading?
mustn't you have been pervading?
mustn't she have been pervading?
mustn't we have been pervading?
mustn't you have been pervading?
mustn't they have been pervading?