could stumble
Verbe régulier : stumble - stumbled- stumbled
Traduction française : trébucher - faire un faux pas 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could stumble
you could stumble
he could stumble
we could stumble
you could stumble
they could stumble 	I could be stumbling
you could be stumbling
he could be stumbling
we could be stumbling
you could be stumbling
they could be stumbling	I could have stumbled
you could have stumbled
he could have stumbled
we could have stumbled
you could have stumbled
they could have stumbled	I could have been stumbling
you could have been stumbling
he could have been stumbling
we could have been stumbling
you could have been stumbling
they could have been stumbling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't stumble
you couldn't stumble
he couldn't stumble
we couldn't stumble
you couldn't stumble
they couldn't stumble 	I couldn't be stumbling
you couldn't be stumbling
he couldn't be stumbling
we couldn't be stumbling
you couldn't be stumbling
they couldn't be stumbling	I couldn't have stumbled
you couldn't have stumbled
he couldn't have stumbled
we couldn't have stumbled
you couldn't have stumbled
they couldn't have stumbled	I couldn't have been stumbling
you couldn't have been stumbling
he couldn't have been stumbling
we couldn't have been stumbling
you couldn't have been stumbling
they couldn't have been stumbling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I stumble?
could you stumble?
could he stumble?
could we stumble?
could you stumble?
could they stumble? 	could I be stumbling?
could you be stumbling?
could he be stumbling?
could we be stumbling?
could you be stumbling?
could they be stumbling? 	could I have stumbled?
could you have stumbled?
could he have stumbled?
could we have stumbled?
could you have stumbled?
could they have stumbled? 	could I have been stumbling?
could you have been stumbling?
could he have been stumbling?
could we have been stumbling?
could you have been stumbling?
could they have been stumbling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I stumble?
couldn't you stumble?
couldn't he stumble?
couldn't we stumble?
couldn't you stumble?
couldn't they stumble? 	couldn't I be stumbling?
couldn't you be stumbling?
couldn't he be stumbling?
couldn't we be stumbling?
couldn't you be stumbling?
couldn't they be stumbling? 	couldn't I have stumbled?
couldn't you have stumbled?
couldn't he have stumbled?
couldn't we have stumbled?
couldn't you have stumbled?
couldn't they have stumbled? 	couldn't I have been stumbling?
couldn't you have been stumbling?
couldn't he have been stumbling?
couldn't we have been stumbling?
couldn't you have been stumbling?
couldn't they have been stumbling?