could sharpen
Regelmä&szlig;iges Verb: sharpen - sharpened- sharpened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could sharpen
you could sharpen
he could sharpen
we could sharpen
you could sharpen
they could sharpen 	I could be sharpening
you could be sharpening
he could be sharpening
we could be sharpening
you could be sharpening
they could be sharpening	I could have sharpened
you could have sharpened
he could have sharpened
we could have sharpened
you could have sharpened
they could have sharpened	I could have been sharpening
you could have been sharpening
he could have been sharpening
we could have been sharpening
you could have been sharpening
they could have been sharpening	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not sharpen
you could not sharpen
he could not sharpen
we could not sharpen
you could not sharpen
they could not sharpen 	I could not be sharpening
you could not be sharpening
he could not be sharpening
we could not be sharpening
you could not be sharpening
they could not be sharpening	I could not have sharpened
you could not have sharpened
he could not have sharpened
we could not have sharpened
you could not have sharpened
they could not have sharpened	I could not have been sharpening
you could not have been sharpening
he could not have been sharpening
we could not have been sharpening
you could not have been sharpening
they could not have been sharpening	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I sharpen?
could you sharpen?
could he sharpen?
could we sharpen?
could you sharpen?
could they sharpen? 	could I be sharpening?
could you be sharpening?
could he be sharpening?
could we be sharpening?
could you be sharpening?
could they be sharpening? 	could I have sharpened?
could you have sharpened?
could he have sharpened?
could we have sharpened?
could you have sharpened?
could they have sharpened? 	could I have been sharpening?
could you have been sharpening?
could he have been sharpening?
could we have been sharpening?
could you have been sharpening?
could they have been sharpening? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not sharpen?
could you not sharpen?
could he not sharpen?
could we not sharpen?
could you not sharpen?
could they not sharpen? 	could I not be sharpening?
could you not be sharpening?
could he not be sharpening?
could we not be sharpening?
could you not be sharpening?
could they not be sharpening? 	could I not have sharpened?
could you not have sharpened?
could he not have sharpened?
could we not have sharpened?
could you not have sharpened?
could they not have sharpened? 	could I not have been sharpening?
could you not have been sharpening?
could he not have been sharpening?
could we not have been sharpening?
could you not have been sharpening?
could they not have been sharpening?