must persist
Verbo regular: persist - persisted- persisted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must persist
you must persist
he must persist
we must persist
you must persist
they must persist 	I must be persisting
you must be persisting
he must be persisting
we must be persisting
you must be persisting
they must be persisting	I must have persisted
you must have persisted
he must have persisted
we must have persisted
you must have persisted
they must have persisted	I must have been persisting
you must have been persisting
he must have been persisting
we must have been persisting
you must have been persisting
they must have been persisting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't persist
you mustn't persist
he mustn't persist
we mustn't persist
you mustn't persist
they mustn't persist 	I mustn't be persisting
you mustn't be persisting
he mustn't be persisting
we mustn't be persisting
you mustn't be persisting
they mustn't be persisting	I mustn't have persisted
you mustn't have persisted
he mustn't have persisted
we mustn't have persisted
you mustn't have persisted
they mustn't have persisted	I mustn't have been persisting
you mustn't have been persisting
he mustn't have been persisting
we mustn't have been persisting
you mustn't have been persisting
they mustn't have been persisting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I persist?
must you persist?
must he persist?
must we persist?
must you persist?
must they persist? 	must I be persisting?
must you be persisting?
must he be persisting?
must we be persisting?
must you be persisting?
must they be persisting? 	must I have persisted?
must you have persisted?
must he have persisted?
must we have persisted?
must you have persisted?
must they have persisted? 	must I have been persisting?
must you have been persisting?
must he have been persisting?
must we have been persisting?
must you have been persisting?
must they have been persisting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I persist?
mustn't you persist?
mustn't he persist?
mustn't we persist?
mustn't you persist?
mustn't they persist? 	mustn't I be persisting?
mustn't you be persisting?
mustn't he be persisting?
mustn't we be persisting?
mustn't you be persisting?
mustn't they be persisting? 	mustn't I have persisted?
mustn't you have persisted?
mustn't he have persisted?
mustn't we have persisted?
mustn't you have persisted?
mustn't they have persisted? 	mustn't I have been persisting?
mustn't you have been persisting?
mustn't he have been persisting?
mustn't we have been persisting?
mustn't you have been persisting?
mustn't they have been persisting?