could yard
Verbo regular: yard - yarded- yarded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could yard
you could yard
he could yard
we could yard
you could yard
they could yard 	I could be yarding
you could be yarding
he could be yarding
we could be yarding
you could be yarding
they could be yarding	I could have yarded
you could have yarded
he could have yarded
we could have yarded
you could have yarded
they could have yarded	I could have been yarding
you could have been yarding
he could have been yarding
we could have been yarding
you could have been yarding
they could have been yarding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't yard
you couldn't yard
he couldn't yard
we couldn't yard
you couldn't yard
they couldn't yard 	I couldn't be yarding
you couldn't be yarding
he couldn't be yarding
we couldn't be yarding
you couldn't be yarding
they couldn't be yarding	I couldn't have yarded
you couldn't have yarded
he couldn't have yarded
we couldn't have yarded
you couldn't have yarded
they couldn't have yarded	I couldn't have been yarding
you couldn't have been yarding
he couldn't have been yarding
we couldn't have been yarding
you couldn't have been yarding
they couldn't have been yarding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I yard?
could you yard?
could he yard?
could we yard?
could you yard?
could they yard? 	could I be yarding?
could you be yarding?
could he be yarding?
could we be yarding?
could you be yarding?
could they be yarding? 	could I have yarded?
could you have yarded?
could he have yarded?
could we have yarded?
could you have yarded?
could they have yarded? 	could I have been yarding?
could you have been yarding?
could he have been yarding?
could we have been yarding?
could you have been yarding?
could they have been yarding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I yard?
couldn't you yard?
couldn't he yard?
couldn't we yard?
couldn't you yard?
couldn't they yard? 	couldn't I be yarding?
couldn't you be yarding?
couldn't he be yarding?
couldn't we be yarding?
couldn't you be yarding?
couldn't they be yarding? 	couldn't I have yarded?
couldn't you have yarded?
couldn't he have yarded?
couldn't we have yarded?
couldn't you have yarded?
couldn't they have yarded? 	couldn't I have been yarding?
couldn't you have been yarding?
couldn't he have been yarding?
couldn't we have been yarding?
couldn't you have been yarding?
couldn't they have been yarding?