I could persist you could persist she could persist we could persist you could persist they could persist
Forma con V-ing
I could be persisting you could be persisting she could be persisting we could be persisting you could be persisting they could be persisting
Perfecto
I could have persisted you could have persisted she could have persisted we could have persisted you could have persisted they could have persisted
Perfecto con V-ing
I could have been persisting you could have been persisting she could have been persisting we could have been persisting you could have been persisting they could have been persisting
Negación
Forma simple
I could not persist you could not persist she could not persist we could not persist you could not persist they could not persist
Forma con V-ing
I could not be persisting you could not be persisting she could not be persisting we could not be persisting you could not be persisting they could not be persisting
Perfecto
I could not have persisted you could not have persisted she could not have persisted we could not have persisted you could not have persisted they could not have persisted
Perfecto con V-ing
I could not have been persisting you could not have been persisting she could not have been persisting we could not have been persisting you could not have been persisting they could not have been persisting
Forma interrogativa
Forma simple
could I persist? could you persist? could she persist? could we persist? could you persist? could they persist?
Forma con V-ing
could I be persisting? could you be persisting? could she be persisting? could we be persisting? could you be persisting? could they be persisting?
Perfecto
could I have persisted? could you have persisted? could she have persisted? could we have persisted? could you have persisted? could they have persisted?
Perfecto con V-ing
could I have been persisting? could you have been persisting? could she have been persisting? could we have been persisting? could you have been persisting? could they have been persisting?
Forma interro-negativa
Forma simple
could I not persist? could you not persist? could she not persist? could we not persist? could you not persist? could they not persist?
Forma con V-ing
could I not be persisting? could you not be persisting? could she not be persisting? could we not be persisting? could you not be persisting? could they not be persisting?
Perfecto
could I not have persisted? could you not have persisted? could she not have persisted? could we not have persisted? could you not have persisted? could they not have persisted?
Perfecto con V-ing
could I not have been persisting? could you not have been persisting? could she not have been persisting? could we not have been persisting? could you not have been persisting? could they not have been persisting?