could prang
Regular verb: prang - pranged- pranged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prang
you could prang
he could prang
we could prang
you could prang
they could prang 	I could be pranging
you could be pranging
he could be pranging
we could be pranging
you could be pranging
they could be pranging	I could have pranged
you could have pranged
he could have pranged
we could have pranged
you could have pranged
they could have pranged	I could have been pranging
you could have been pranging
he could have been pranging
we could have been pranging
you could have been pranging
they could have been pranging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not prang
you could not prang
he could not prang
we could not prang
you could not prang
they could not prang 	I could not be pranging
you could not be pranging
he could not be pranging
we could not be pranging
you could not be pranging
they could not be pranging	I could not have pranged
you could not have pranged
he could not have pranged
we could not have pranged
you could not have pranged
they could not have pranged	I could not have been pranging
you could not have been pranging
he could not have been pranging
we could not have been pranging
you could not have been pranging
they could not have been pranging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prang?
could you prang?
could he prang?
could we prang?
could you prang?
could they prang? 	could I be pranging?
could you be pranging?
could he be pranging?
could we be pranging?
could you be pranging?
could they be pranging? 	could I have pranged?
could you have pranged?
could he have pranged?
could we have pranged?
could you have pranged?
could they have pranged? 	could I have been pranging?
could you have been pranging?
could he have been pranging?
could we have been pranging?
could you have been pranging?
could they have been pranging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not prang?
could you not prang?
could he not prang?
could we not prang?
could you not prang?
could they not prang? 	could I not be pranging?
could you not be pranging?
could he not be pranging?
could we not be pranging?
could you not be pranging?
could they not be pranging? 	could I not have pranged?
could you not have pranged?
could he not have pranged?
could we not have pranged?
could you not have pranged?
could they not have pranged? 	could I not have been pranging?
could you not have been pranging?
could he not have been pranging?
could we not have been pranging?
could you not have been pranging?
could they not have been pranging?