can persist
Verbo regular: persist - persisted- persisted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can persist
you can persist
he can persist
we can persist
you can persist
they can persist 	I can be persisting
you can be persisting
he can be persisting
we can be persisting
you can be persisting
they can be persisting	I can have persisted
you can have persisted
he can have persisted
we can have persisted
you can have persisted
they can have persisted	I can have been persisting
you can have been persisting
he can have been persisting
we can have been persisting
you can have been persisting
they can have been persisting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot persist
you cannot persist
he cannot persist
we cannot persist
you cannot persist
they cannot persist 	I cannot be persisting
you cannot be persisting
he cannot be persisting
we cannot be persisting
you cannot be persisting
they cannot be persisting	I cannot have persisted
you cannot have persisted
he cannot have persisted
we cannot have persisted
you cannot have persisted
they cannot have persisted	I cannot have been persisting
you cannot have been persisting
he cannot have been persisting
we cannot have been persisting
you cannot have been persisting
they cannot have been persisting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I persist?
can you persist?
can he persist?
can we persist?
can you persist?
can they persist? 	can I be persisting?
can you be persisting?
can he be persisting?
can we be persisting?
can you be persisting?
can they be persisting? 	can I have persisted?
can you have persisted?
can he have persisted?
can we have persisted?
can you have persisted?
can they have persisted? 	can I have been persisting?
can you have been persisting?
can he have been persisting?
can we have been persisting?
can you have been persisting?
can they have been persisting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not persist?
can you not persist?
can he not persist?
can we not persist?
can you not persist?
can they not persist? 	can I not be persisting?
can you not be persisting?
can he not be persisting?
can we not be persisting?
can you not be persisting?
can they not be persisting? 	can I not have persisted?
can you not have persisted?
can he not have persisted?
can we not have persisted?
can you not have persisted?
can they not have persisted? 	can I not have been persisting?
can you not have been persisting?
can he not have been persisting?
can we not have been persisting?
can you not have been persisting?
can they not have been persisting?