could persevere persevere
Verbo regular: persevere persevere - persevere persevered- persevere persevered

ón, este verbo puede no existir, se da como ejemplo la conjugación.

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could persevere persevere
you could persevere persevere
he could persevere persevere
we could persevere persevere
you could persevere persevere
they could persevere persevere 	I could be persevere persevering
you could be persevere persevering
he could be persevere persevering
we could be persevere persevering
you could be persevere persevering
they could be persevere persevering	I could have persevere persevered
you could have persevere persevered
he could have persevere persevered
we could have persevere persevered
you could have persevere persevered
they could have persevere persevered	I could have been persevere persevering
you could have been persevere persevering
he could have been persevere persevering
we could have been persevere persevering
you could have been persevere persevering
they could have been persevere persevering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't persevere persevere
you couldn't persevere persevere
he couldn't persevere persevere
we couldn't persevere persevere
you couldn't persevere persevere
they couldn't persevere persevere 	I couldn't be persevere persevering
you couldn't be persevere persevering
he couldn't be persevere persevering
we couldn't be persevere persevering
you couldn't be persevere persevering
they couldn't be persevere persevering	I couldn't have persevere persevered
you couldn't have persevere persevered
he couldn't have persevere persevered
we couldn't have persevere persevered
you couldn't have persevere persevered
they couldn't have persevere persevered	I couldn't have been persevere persevering
you couldn't have been persevere persevering
he couldn't have been persevere persevering
we couldn't have been persevere persevering
you couldn't have been persevere persevering
they couldn't have been persevere persevering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I persevere persevere?
could you persevere persevere?
could he persevere persevere?
could we persevere persevere?
could you persevere persevere?
could they persevere persevere? 	could I be persevere persevering?
could you be persevere persevering?
could he be persevere persevering?
could we be persevere persevering?
could you be persevere persevering?
could they be persevere persevering? 	could I have persevere persevered?
could you have persevere persevered?
could he have persevere persevered?
could we have persevere persevered?
could you have persevere persevered?
could they have persevere persevered? 	could I have been persevere persevering?
could you have been persevere persevering?
could he have been persevere persevering?
could we have been persevere persevering?
could you have been persevere persevering?
could they have been persevere persevering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I persevere persevere?
couldn't you persevere persevere?
couldn't he persevere persevere?
couldn't we persevere persevere?
couldn't you persevere persevere?
couldn't they persevere persevere? 	couldn't I be persevere persevering?
couldn't you be persevere persevering?
couldn't he be persevere persevering?
couldn't we be persevere persevering?
couldn't you be persevere persevering?
couldn't they be persevere persevering? 	couldn't I have persevere persevered?
couldn't you have persevere persevered?
couldn't he have persevere persevered?
couldn't we have persevere persevered?
couldn't you have persevere persevered?
couldn't they have persevere persevered? 	couldn't I have been persevere persevering?
couldn't you have been persevere persevering?
couldn't he have been persevere persevering?
couldn't we have been persevere persevering?
couldn't you have been persevere persevering?
couldn't they have been persevere persevering?