could yaw
Verbo regular: yaw - yawed- yawed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could yaw
you could yaw
he could yaw
we could yaw
you could yaw
they could yaw 	I could be yawing
you could be yawing
he could be yawing
we could be yawing
you could be yawing
they could be yawing	I could have yawed
you could have yawed
he could have yawed
we could have yawed
you could have yawed
they could have yawed	I could have been yawing
you could have been yawing
he could have been yawing
we could have been yawing
you could have been yawing
they could have been yawing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not yaw
you could not yaw
he could not yaw
we could not yaw
you could not yaw
they could not yaw 	I could not be yawing
you could not be yawing
he could not be yawing
we could not be yawing
you could not be yawing
they could not be yawing	I could not have yawed
you could not have yawed
he could not have yawed
we could not have yawed
you could not have yawed
they could not have yawed	I could not have been yawing
you could not have been yawing
he could not have been yawing
we could not have been yawing
you could not have been yawing
they could not have been yawing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I yaw?
could you yaw?
could he yaw?
could we yaw?
could you yaw?
could they yaw? 	could I be yawing?
could you be yawing?
could he be yawing?
could we be yawing?
could you be yawing?
could they be yawing? 	could I have yawed?
could you have yawed?
could he have yawed?
could we have yawed?
could you have yawed?
could they have yawed? 	could I have been yawing?
could you have been yawing?
could he have been yawing?
could we have been yawing?
could you have been yawing?
could they have been yawing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not yaw?
could you not yaw?
could he not yaw?
could we not yaw?
could you not yaw?
could they not yaw? 	could I not be yawing?
could you not be yawing?
could he not be yawing?
could we not be yawing?
could you not be yawing?
could they not be yawing? 	could I not have yawed?
could you not have yawed?
could he not have yawed?
could we not have yawed?
could you not have yawed?
could they not have yawed? 	could I not have been yawing?
could you not have been yawing?
could he not have been yawing?
could we not have been yawing?
could you not have been yawing?
could they not have been yawing?