could stumble
Regelmä&szlig;iges Verb: stumble - stumbled- stumbled

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit 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	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not stumble
you could not stumble
he could not stumble
we could not stumble
you could not stumble
they could not stumble 	I could not be stumbling
you could not be stumbling
he could not be stumbling
we could not be stumbling
you could not be stumbling
they could not be stumbling	I could not have stumbled
you could not have stumbled
he could not have stumbled
we could not have stumbled
you could not have stumbled
they could not have stumbled	I could not have been stumbling
you could not have been stumbling
he could not have been stumbling
we could not have been stumbling
you could not have been stumbling
they could not have been stumbling	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit 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? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not stumble?
could you not stumble?
could he not stumble?
could we not stumble?
could you not stumble?
could they not stumble? 	could I not be stumbling?
could you not be stumbling?
could he not be stumbling?
could we not be stumbling?
could you not be stumbling?
could they not be stumbling? 	could I not have stumbled?
could you not have stumbled?
could he not have stumbled?
could we not have stumbled?
could you not have stumbled?
could they not have stumbled? 	could I not have been stumbling?
could you not have been stumbling?
could he not have been stumbling?
could we not have been stumbling?
could you not have been stumbling?
could they not have been stumbling?