could roller-skate
Regelmä&szlig;iges Verb: roller-skate - roller-skated- roller-skated

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could roller-skate
you could roller-skate
he could roller-skate
we could roller-skate
you could roller-skate
they could roller-skate 	I could be roller-skating
you could be roller-skating
he could be roller-skating
we could be roller-skating
you could be roller-skating
they could be roller-skating	I could have roller-skated
you could have roller-skated
he could have roller-skated
we could have roller-skated
you could have roller-skated
they could have roller-skated	I could have been roller-skating
you could have been roller-skating
he could have been roller-skating
we could have been roller-skating
you could have been roller-skating
they could have been roller-skating	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not roller-skate
you could not roller-skate
he could not roller-skate
we could not roller-skate
you could not roller-skate
they could not roller-skate 	I could not be roller-skating
you could not be roller-skating
he could not be roller-skating
we could not be roller-skating
you could not be roller-skating
they could not be roller-skating	I could not have roller-skated
you could not have roller-skated
he could not have roller-skated
we could not have roller-skated
you could not have roller-skated
they could not have roller-skated	I could not have been roller-skating
you could not have been roller-skating
he could not have been roller-skating
we could not have been roller-skating
you could not have been roller-skating
they could not have been roller-skating	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I roller-skate?
could you roller-skate?
could he roller-skate?
could we roller-skate?
could you roller-skate?
could they roller-skate? 	could I be roller-skating?
could you be roller-skating?
could he be roller-skating?
could we be roller-skating?
could you be roller-skating?
could they be roller-skating? 	could I have roller-skated?
could you have roller-skated?
could he have roller-skated?
could we have roller-skated?
could you have roller-skated?
could they have roller-skated? 	could I have been roller-skating?
could you have been roller-skating?
could he have been roller-skating?
could we have been roller-skating?
could you have been roller-skating?
could they have been roller-skating? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not roller-skate?
could you not roller-skate?
could he not roller-skate?
could we not roller-skate?
could you not roller-skate?
could they not roller-skate? 	could I not be roller-skating?
could you not be roller-skating?
could he not be roller-skating?
could we not be roller-skating?
could you not be roller-skating?
could they not be roller-skating? 	could I not have roller-skated?
could you not have roller-skated?
could he not have roller-skated?
could we not have roller-skated?
could you not have roller-skated?
could they not have roller-skated? 	could I not have been roller-skating?
could you not have been roller-skating?
could he not have been roller-skating?
could we not have been roller-skating?
could you not have been roller-skating?
could they not have been roller-skating?