could invalidate
Regelmä&szlig;iges Verb: invalidate - invalidated- invalidated

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could invalidate
you could invalidate
he could invalidate
we could invalidate
you could invalidate
they could invalidate 	I could be invalidating
you could be invalidating
he could be invalidating
we could be invalidating
you could be invalidating
they could be invalidating	I could have invalidated
you could have invalidated
he could have invalidated
we could have invalidated
you could have invalidated
they could have invalidated	I could have been invalidating
you could have been invalidating
he could have been invalidating
we could have been invalidating
you could have been invalidating
they could have been invalidating	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not invalidate
you could not invalidate
he could not invalidate
we could not invalidate
you could not invalidate
they could not invalidate 	I could not be invalidating
you could not be invalidating
he could not be invalidating
we could not be invalidating
you could not be invalidating
they could not be invalidating	I could not have invalidated
you could not have invalidated
he could not have invalidated
we could not have invalidated
you could not have invalidated
they could not have invalidated	I could not have been invalidating
you could not have been invalidating
he could not have been invalidating
we could not have been invalidating
you could not have been invalidating
they could not have been invalidating	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I invalidate?
could you invalidate?
could he invalidate?
could we invalidate?
could you invalidate?
could they invalidate? 	could I be invalidating?
could you be invalidating?
could he be invalidating?
could we be invalidating?
could you be invalidating?
could they be invalidating? 	could I have invalidated?
could you have invalidated?
could he have invalidated?
could we have invalidated?
could you have invalidated?
could they have invalidated? 	could I have been invalidating?
could you have been invalidating?
could he have been invalidating?
could we have been invalidating?
could you have been invalidating?
could they have been invalidating? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not invalidate?
could you not invalidate?
could he not invalidate?
could we not invalidate?
could you not invalidate?
could they not invalidate? 	could I not be invalidating?
could you not be invalidating?
could he not be invalidating?
could we not be invalidating?
could you not be invalidating?
could they not be invalidating? 	could I not have invalidated?
could you not have invalidated?
could he not have invalidated?
could we not have invalidated?
could you not have invalidated?
could they not have invalidated? 	could I not have been invalidating?
could you not have been invalidating?
could he not have been invalidating?
could we not have been invalidating?
could you not have been invalidating?
could they not have been invalidating?