could ruin
Regelmä&szlig;iges Verb: ruin - ruined- ruined

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could ruin
you could ruin
she could ruin
we could ruin
you could ruin
they could ruin 	I could be ruining
you could be ruining
she could be ruining
we could be ruining
you could be ruining
they could be ruining	I could have ruined
you could have ruined
she could have ruined
we could have ruined
you could have ruined
they could have ruined	I could have been ruining
you could have been ruining
she could have been ruining
we could have been ruining
you could have been ruining
they could have been ruining	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not ruin
you could not ruin
she could not ruin
we could not ruin
you could not ruin
they could not ruin 	I could not be ruining
you could not be ruining
she could not be ruining
we could not be ruining
you could not be ruining
they could not be ruining	I could not have ruined
you could not have ruined
she could not have ruined
we could not have ruined
you could not have ruined
they could not have ruined	I could not have been ruining
you could not have been ruining
she could not have been ruining
we could not have been ruining
you could not have been ruining
they could not have been ruining	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I ruin?
could you ruin?
could she ruin?
could we ruin?
could you ruin?
could they ruin? 	could I be ruining?
could you be ruining?
could she be ruining?
could we be ruining?
could you be ruining?
could they be ruining? 	could I have ruined?
could you have ruined?
could she have ruined?
could we have ruined?
could you have ruined?
could they have ruined? 	could I have been ruining?
could you have been ruining?
could she have been ruining?
could we have been ruining?
could you have been ruining?
could they have been ruining? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not ruin?
could you not ruin?
could she not ruin?
could we not ruin?
could you not ruin?
could they not ruin? 	could I not be ruining?
could you not be ruining?
could she not be ruining?
could we not be ruining?
could you not be ruining?
could they not be ruining? 	could I not have ruined?
could you not have ruined?
could she not have ruined?
could we not have ruined?
could you not have ruined?
could they not have ruined? 	could I not have been ruining?
could you not have been ruining?
could she not have been ruining?
could we not have been ruining?
could you not have been ruining?
could they not have been ruining?