could operate
Regelmä&szlig;iges Verb: operate - operated- operated

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could operate
you could operate
he could operate
we could operate
you could operate
they could operate 	I could be operating
you could be operating
he could be operating
we could be operating
you could be operating
they could be operating	I could have operated
you could have operated
he could have operated
we could have operated
you could have operated
they could have operated	I could have been operating
you could have been operating
he could have been operating
we could have been operating
you could have been operating
they could have been operating	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I couldn't operate
you couldn't operate
he couldn't operate
we couldn't operate
you couldn't operate
they couldn't operate 	I couldn't be operating
you couldn't be operating
he couldn't be operating
we couldn't be operating
you couldn't be operating
they couldn't be operating	I couldn't have operated
you couldn't have operated
he couldn't have operated
we couldn't have operated
you couldn't have operated
they couldn't have operated	I couldn't have been operating
you couldn't have been operating
he couldn't have been operating
we couldn't have been operating
you couldn't have been operating
they couldn't have been operating	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I operate?
could you operate?
could he operate?
could we operate?
could you operate?
could they operate? 	could I be operating?
could you be operating?
could he be operating?
could we be operating?
could you be operating?
could they be operating? 	could I have operated?
could you have operated?
could he have operated?
could we have operated?
could you have operated?
could they have operated? 	could I have been operating?
could you have been operating?
could he have been operating?
could we have been operating?
could you have been operating?
could they have been operating? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
couldn't I operate?
couldn't you operate?
couldn't he operate?
couldn't we operate?
couldn't you operate?
couldn't they operate? 	couldn't I be operating?
couldn't you be operating?
couldn't he be operating?
couldn't we be operating?
couldn't you be operating?
couldn't they be operating? 	couldn't I have operated?
couldn't you have operated?
couldn't he have operated?
couldn't we have operated?
couldn't you have operated?
couldn't they have operated? 	couldn't I have been operating?
couldn't you have been operating?
couldn't he have been operating?
couldn't we have been operating?
couldn't you have been operating?
couldn't they have been operating?