could tower
Verbo regular: tower - towered- towered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could tower
you could tower
he could tower
we could tower
you could tower
they could tower 	I could be towering
you could be towering
he could be towering
we could be towering
you could be towering
they could be towering	I could have towered
you could have towered
he could have towered
we could have towered
you could have towered
they could have towered	I could have been towering
you could have been towering
he could have been towering
we could have been towering
you could have been towering
they could have been towering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not tower
you could not tower
he could not tower
we could not tower
you could not tower
they could not tower 	I could not be towering
you could not be towering
he could not be towering
we could not be towering
you could not be towering
they could not be towering	I could not have towered
you could not have towered
he could not have towered
we could not have towered
you could not have towered
they could not have towered	I could not have been towering
you could not have been towering
he could not have been towering
we could not have been towering
you could not have been towering
they could not have been towering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I tower?
could you tower?
could he tower?
could we tower?
could you tower?
could they tower? 	could I be towering?
could you be towering?
could he be towering?
could we be towering?
could you be towering?
could they be towering? 	could I have towered?
could you have towered?
could he have towered?
could we have towered?
could you have towered?
could they have towered? 	could I have been towering?
could you have been towering?
could he have been towering?
could we have been towering?
could you have been towering?
could they have been towering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not tower?
could you not tower?
could he not tower?
could we not tower?
could you not tower?
could they not tower? 	could I not be towering?
could you not be towering?
could he not be towering?
could we not be towering?
could you not be towering?
could they not be towering? 	could I not have towered?
could you not have towered?
could he not have towered?
could we not have towered?
could you not have towered?
could they not have towered? 	could I not have been towering?
could you not have been towering?
could he not have been towering?
could we not have been towering?
could you not have been towering?
could they not have been towering?