could stair-step
Verbe régulier : stair-step - stair-steped- stair-steped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could stair-step
you could stair-step
she 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
she 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
she 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
she could have been stair-steping
we could have been stair-steping
you could have been stair-steping
they could have been stair-steping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't stair-step
you couldn't stair-step
she couldn't stair-step
we couldn't stair-step
you couldn't stair-step
they couldn't stair-step 	I couldn't be stair-steping
you couldn't be stair-steping
she couldn't be stair-steping
we couldn't be stair-steping
you couldn't be stair-steping
they couldn't be stair-steping	I couldn't have stair-steped
you couldn't have stair-steped
she couldn't have stair-steped
we couldn't have stair-steped
you couldn't have stair-steped
they couldn't have stair-steped	I couldn't have been stair-steping
you couldn't have been stair-steping
she couldn't have been stair-steping
we couldn't have been stair-steping
you couldn't have been stair-steping
they couldn't have been stair-steping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I stair-step?
could you stair-step?
could she 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 she 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 she 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 she have been stair-steping?
could we have been stair-steping?
could you have been stair-steping?
could they have been stair-steping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I stair-step?
couldn't you stair-step?
couldn't she stair-step?
couldn't we stair-step?
couldn't you stair-step?
couldn't they stair-step? 	couldn't I be stair-steping?
couldn't you be stair-steping?
couldn't she be stair-steping?
couldn't we be stair-steping?
couldn't you be stair-steping?
couldn't they be stair-steping? 	couldn't I have stair-steped?
couldn't you have stair-steped?
couldn't she have stair-steped?
couldn't we have stair-steped?
couldn't you have stair-steped?
couldn't they have stair-steped? 	couldn't I have been stair-steping?
couldn't you have been stair-steping?
couldn't she have been stair-steping?
couldn't we have been stair-steping?
couldn't you have been stair-steping?
couldn't they have been stair-steping?