could stool
Verbo regular: stool - stooled- stooled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stool
you could stool
he could stool
we could stool
you could stool
they could stool 	I could be stooling
you could be stooling
he could be stooling
we could be stooling
you could be stooling
they could be stooling	I could have stooled
you could have stooled
he could have stooled
we could have stooled
you could have stooled
they could have stooled	I could have been stooling
you could have been stooling
he could have been stooling
we could have been stooling
you could have been stooling
they could have been stooling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not stool
you could not stool
he could not stool
we could not stool
you could not stool
they could not stool 	I could not be stooling
you could not be stooling
he could not be stooling
we could not be stooling
you could not be stooling
they could not be stooling	I could not have stooled
you could not have stooled
he could not have stooled
we could not have stooled
you could not have stooled
they could not have stooled	I could not have been stooling
you could not have been stooling
he could not have been stooling
we could not have been stooling
you could not have been stooling
they could not have been stooling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stool?
could you stool?
could he stool?
could we stool?
could you stool?
could they stool? 	could I be stooling?
could you be stooling?
could he be stooling?
could we be stooling?
could you be stooling?
could they be stooling? 	could I have stooled?
could you have stooled?
could he have stooled?
could we have stooled?
could you have stooled?
could they have stooled? 	could I have been stooling?
could you have been stooling?
could he have been stooling?
could we have been stooling?
could you have been stooling?
could they have been stooling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not stool?
could you not stool?
could he not stool?
could we not stool?
could you not stool?
could they not stool? 	could I not be stooling?
could you not be stooling?
could he not be stooling?
could we not be stooling?
could you not be stooling?
could they not be stooling? 	could I not have stooled?
could you not have stooled?
could he not have stooled?
could we not have stooled?
could you not have stooled?
could they not have stooled? 	could I not have been stooling?
could you not have been stooling?
could he not have been stooling?
could we not have been stooling?
could you not have been stooling?
could they not have been stooling?