could whistle
Regelmä&szlig;iges Verb: whistle - whistled- whistled

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could whistle
you could whistle
he could whistle
we could whistle
you could whistle
they could whistle 	I could be whistling
you could be whistling
he could be whistling
we could be whistling
you could be whistling
they could be whistling	I could have whistled
you could have whistled
he could have whistled
we could have whistled
you could have whistled
they could have whistled	I could have been whistling
you could have been whistling
he could have been whistling
we could have been whistling
you could have been whistling
they could have been whistling	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I couldn't whistle
you couldn't whistle
he couldn't whistle
we couldn't whistle
you couldn't whistle
they couldn't whistle 	I couldn't be whistling
you couldn't be whistling
he couldn't be whistling
we couldn't be whistling
you couldn't be whistling
they couldn't be whistling	I couldn't have whistled
you couldn't have whistled
he couldn't have whistled
we couldn't have whistled
you couldn't have whistled
they couldn't have whistled	I couldn't have been whistling
you couldn't have been whistling
he couldn't have been whistling
we couldn't have been whistling
you couldn't have been whistling
they couldn't have been whistling	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I whistle?
could you whistle?
could he whistle?
could we whistle?
could you whistle?
could they whistle? 	could I be whistling?
could you be whistling?
could he be whistling?
could we be whistling?
could you be whistling?
could they be whistling? 	could I have whistled?
could you have whistled?
could he have whistled?
could we have whistled?
could you have whistled?
could they have whistled? 	could I have been whistling?
could you have been whistling?
could he have been whistling?
could we have been whistling?
could you have been whistling?
could they have been whistling? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
couldn't I whistle?
couldn't you whistle?
couldn't he whistle?
couldn't we whistle?
couldn't you whistle?
couldn't they whistle? 	couldn't I be whistling?
couldn't you be whistling?
couldn't he be whistling?
couldn't we be whistling?
couldn't you be whistling?
couldn't they be whistling? 	couldn't I have whistled?
couldn't you have whistled?
couldn't he have whistled?
couldn't we have whistled?
couldn't you have whistled?
couldn't they have whistled? 	couldn't I have been whistling?
couldn't you have been whistling?
couldn't he have been whistling?
couldn't we have been whistling?
couldn't you have been whistling?
couldn't they have been whistling?