could sprain
Verbo regular: sprain - sprained- sprained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sprain
you could sprain
he could sprain
we could sprain
you could sprain
they could sprain 	I could be spraining
you could be spraining
he could be spraining
we could be spraining
you could be spraining
they could be spraining	I could have sprained
you could have sprained
he could have sprained
we could have sprained
you could have sprained
they could have sprained	I could have been spraining
you could have been spraining
he could have been spraining
we could have been spraining
you could have been spraining
they could have been spraining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sprain
you could not sprain
he could not sprain
we could not sprain
you could not sprain
they could not sprain 	I could not be spraining
you could not be spraining
he could not be spraining
we could not be spraining
you could not be spraining
they could not be spraining	I could not have sprained
you could not have sprained
he could not have sprained
we could not have sprained
you could not have sprained
they could not have sprained	I could not have been spraining
you could not have been spraining
he could not have been spraining
we could not have been spraining
you could not have been spraining
they could not have been spraining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sprain?
could you sprain?
could he sprain?
could we sprain?
could you sprain?
could they sprain? 	could I be spraining?
could you be spraining?
could he be spraining?
could we be spraining?
could you be spraining?
could they be spraining? 	could I have sprained?
could you have sprained?
could he have sprained?
could we have sprained?
could you have sprained?
could they have sprained? 	could I have been spraining?
could you have been spraining?
could he have been spraining?
could we have been spraining?
could you have been spraining?
could they have been spraining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sprain?
could you not sprain?
could he not sprain?
could we not sprain?
could you not sprain?
could they not sprain? 	could I not be spraining?
could you not be spraining?
could he not be spraining?
could we not be spraining?
could you not be spraining?
could they not be spraining? 	could I not have sprained?
could you not have sprained?
could he not have sprained?
could we not have sprained?
could you not have sprained?
could they not have sprained? 	could I not have been spraining?
could you not have been spraining?
could he not have been spraining?
could we not have been spraining?
could you not have been spraining?
could they not have been spraining?