could stretch
Verbo regular: stretch - stretched- stretched

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stretch
you could stretch
he could stretch
we could stretch
you could stretch
they could stretch 	I could be stretching
you could be stretching
he could be stretching
we could be stretching
you could be stretching
they could be stretching	I could have stretched
you could have stretched
he could have stretched
we could have stretched
you could have stretched
they could have stretched	I could have been stretching
you could have been stretching
he could have been stretching
we could have been stretching
you could have been stretching
they could have been stretching	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't stretch
you couldn't stretch
he couldn't stretch
we couldn't stretch
you couldn't stretch
they couldn't stretch 	I couldn't be stretching
you couldn't be stretching
he couldn't be stretching
we couldn't be stretching
you couldn't be stretching
they couldn't be stretching	I couldn't have stretched
you couldn't have stretched
he couldn't have stretched
we couldn't have stretched
you couldn't have stretched
they couldn't have stretched	I couldn't have been stretching
you couldn't have been stretching
he couldn't have been stretching
we couldn't have been stretching
you couldn't have been stretching
they couldn't have been stretching	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stretch?
could you stretch?
could he stretch?
could we stretch?
could you stretch?
could they stretch? 	could I be stretching?
could you be stretching?
could he be stretching?
could we be stretching?
could you be stretching?
could they be stretching? 	could I have stretched?
could you have stretched?
could he have stretched?
could we have stretched?
could you have stretched?
could they have stretched? 	could I have been stretching?
could you have been stretching?
could he have been stretching?
could we have been stretching?
could you have been stretching?
could they have been stretching? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I stretch?
couldn't you stretch?
couldn't he stretch?
couldn't we stretch?
couldn't you stretch?
couldn't they stretch? 	couldn't I be stretching?
couldn't you be stretching?
couldn't he be stretching?
couldn't we be stretching?
couldn't you be stretching?
couldn't they be stretching? 	couldn't I have stretched?
couldn't you have stretched?
couldn't he have stretched?
couldn't we have stretched?
couldn't you have stretched?
couldn't they have stretched? 	couldn't I have been stretching?
couldn't you have been stretching?
couldn't he have been stretching?
couldn't we have been stretching?
couldn't you have been stretching?
couldn't they have been stretching?