could stair-step
Verbo regular: stair-step - stair-steped- stair-steped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stair-step
you could stair-step
he could stair-step
we could stair-step
you could stair-step
they could stair-step 	I could be stair-steping
you could be stair-steping
he could be stair-steping
we could be stair-steping
you could be stair-steping
they could be stair-steping	I could have stair-steped
you could have stair-steped
he could have stair-steped
we could have stair-steped
you could have stair-steped
they could have stair-steped	I could have been stair-steping
you could have been stair-steping
he could have been stair-steping
we could have been stair-steping
you could have been stair-steping
they could have been stair-steping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not stair-step
you could not stair-step
he could not stair-step
we could not stair-step
you could not stair-step
they could not stair-step 	I could not be stair-steping
you could not be stair-steping
he could not be stair-steping
we could not be stair-steping
you could not be stair-steping
they could not be stair-steping	I could not have stair-steped
you could not have stair-steped
he could not have stair-steped
we could not have stair-steped
you could not have stair-steped
they could not have stair-steped	I could not have been stair-steping
you could not have been stair-steping
he could not have been stair-steping
we could not have been stair-steping
you could not have been stair-steping
they could not have been stair-steping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stair-step?
could you stair-step?
could he stair-step?
could we stair-step?
could you stair-step?
could they stair-step? 	could I be stair-steping?
could you be stair-steping?
could he be stair-steping?
could we be stair-steping?
could you be stair-steping?
could they be stair-steping? 	could I have stair-steped?
could you have stair-steped?
could he have stair-steped?
could we have stair-steped?
could you have stair-steped?
could they have stair-steped? 	could I have been stair-steping?
could you have been stair-steping?
could he have been stair-steping?
could we have been stair-steping?
could you have been stair-steping?
could they have been stair-steping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not stair-step?
could you not stair-step?
could he not stair-step?
could we not stair-step?
could you not stair-step?
could they not stair-step? 	could I not be stair-steping?
could you not be stair-steping?
could he not be stair-steping?
could we not be stair-steping?
could you not be stair-steping?
could they not be stair-steping? 	could I not have stair-steped?
could you not have stair-steped?
could he not have stair-steped?
could we not have stair-steped?
could you not have stair-steped?
could they not have stair-steped? 	could I not have been stair-steping?
could you not have been stair-steping?
could he not have been stair-steping?
could we not have been stair-steping?
could you not have been stair-steping?
could they not have been stair-steping?