could shallow
Verbo regular: shallow - shallowed- shallowed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could shallow
you could shallow
he could shallow
we could shallow
you could shallow
they could shallow 	I could be shallowing
you could be shallowing
he could be shallowing
we could be shallowing
you could be shallowing
they could be shallowing	I could have shallowed
you could have shallowed
he could have shallowed
we could have shallowed
you could have shallowed
they could have shallowed	I could have been shallowing
you could have been shallowing
he could have been shallowing
we could have been shallowing
you could have been shallowing
they could have been shallowing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not shallow
you could not shallow
he could not shallow
we could not shallow
you could not shallow
they could not shallow 	I could not be shallowing
you could not be shallowing
he could not be shallowing
we could not be shallowing
you could not be shallowing
they could not be shallowing	I could not have shallowed
you could not have shallowed
he could not have shallowed
we could not have shallowed
you could not have shallowed
they could not have shallowed	I could not have been shallowing
you could not have been shallowing
he could not have been shallowing
we could not have been shallowing
you could not have been shallowing
they could not have been shallowing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I shallow?
could you shallow?
could he shallow?
could we shallow?
could you shallow?
could they shallow? 	could I be shallowing?
could you be shallowing?
could he be shallowing?
could we be shallowing?
could you be shallowing?
could they be shallowing? 	could I have shallowed?
could you have shallowed?
could he have shallowed?
could we have shallowed?
could you have shallowed?
could they have shallowed? 	could I have been shallowing?
could you have been shallowing?
could he have been shallowing?
could we have been shallowing?
could you have been shallowing?
could they have been shallowing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not shallow?
could you not shallow?
could he not shallow?
could we not shallow?
could you not shallow?
could they not shallow? 	could I not be shallowing?
could you not be shallowing?
could he not be shallowing?
could we not be shallowing?
could you not be shallowing?
could they not be shallowing? 	could I not have shallowed?
could you not have shallowed?
could he not have shallowed?
could we not have shallowed?
could you not have shallowed?
could they not have shallowed? 	could I not have been shallowing?
could you not have been shallowing?
could he not have been shallowing?
could we not have been shallowing?
could you not have been shallowing?
could they not have been shallowing?