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 couldn't prang
you couldn't prang
he couldn't prang
we couldn't prang
you couldn't prang
they couldn't prang 	I couldn't be pranging
you couldn't be pranging
he couldn't be pranging
we couldn't be pranging
you couldn't be pranging
they couldn't be pranging	I couldn't have pranged
you couldn't have pranged
he couldn't have pranged
we couldn't have pranged
you couldn't have pranged
they couldn't have pranged	I couldn't have been pranging
you couldn't have been pranging
he couldn't have been pranging
we couldn't have been pranging
you couldn't have been pranging
they couldn't 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 	
couldn't I prang?
couldn't you prang?
couldn't he prang?
couldn't we prang?
couldn't you prang?
couldn't they prang? 	couldn't I be pranging?
couldn't you be pranging?
couldn't he be pranging?
couldn't we be pranging?
couldn't you be pranging?
couldn't they be pranging? 	couldn't I have pranged?
couldn't you have pranged?
couldn't he have pranged?
couldn't we have pranged?
couldn't you have pranged?
couldn't they have pranged? 	couldn't I have been pranging?
couldn't you have been pranging?
couldn't he have been pranging?
couldn't we have been pranging?
couldn't you have been pranging?
couldn't they have been pranging?