could observe
Regelmä&szlig;iges Verb: observe - observed- observed

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could observe
you could observe
he could observe
we could observe
you could observe
they could observe 	I could be observing
you could be observing
he could be observing
we could be observing
you could be observing
they could be observing	I could have observed
you could have observed
he could have observed
we could have observed
you could have observed
they could have observed	I could have been observing
you could have been observing
he could have been observing
we could have been observing
you could have been observing
they could have been observing	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I couldn't observe
you couldn't observe
he couldn't observe
we couldn't observe
you couldn't observe
they couldn't observe 	I couldn't be observing
you couldn't be observing
he couldn't be observing
we couldn't be observing
you couldn't be observing
they couldn't be observing	I couldn't have observed
you couldn't have observed
he couldn't have observed
we couldn't have observed
you couldn't have observed
they couldn't have observed	I couldn't have been observing
you couldn't have been observing
he couldn't have been observing
we couldn't have been observing
you couldn't have been observing
they couldn't have been observing	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I observe?
could you observe?
could he observe?
could we observe?
could you observe?
could they observe? 	could I be observing?
could you be observing?
could he be observing?
could we be observing?
could you be observing?
could they be observing? 	could I have observed?
could you have observed?
could he have observed?
could we have observed?
could you have observed?
could they have observed? 	could I have been observing?
could you have been observing?
could he have been observing?
could we have been observing?
could you have been observing?
could they have been observing? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
couldn't I observe?
couldn't you observe?
couldn't he observe?
couldn't we observe?
couldn't you observe?
couldn't they observe? 	couldn't I be observing?
couldn't you be observing?
couldn't he be observing?
couldn't we be observing?
couldn't you be observing?
couldn't they be observing? 	couldn't I have observed?
couldn't you have observed?
couldn't he have observed?
couldn't we have observed?
couldn't you have observed?
couldn't they have observed? 	couldn't I have been observing?
couldn't you have been observing?
couldn't he have been observing?
couldn't we have been observing?
couldn't you have been observing?
couldn't they have been observing?