could limber
Regular verb: limber - limbered- limbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could limber
you could limber
he could limber
we could limber
you could limber
they could limber 	I could be limbering
you could be limbering
he could be limbering
we could be limbering
you could be limbering
they could be limbering	I could have limbered
you could have limbered
he could have limbered
we could have limbered
you could have limbered
they could have limbered	I could have been limbering
you could have been limbering
he could have been limbering
we could have been limbering
you could have been limbering
they could have been limbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not limber
you could not limber
he could not limber
we could not limber
you could not limber
they could not limber 	I could not be limbering
you could not be limbering
he could not be limbering
we could not be limbering
you could not be limbering
they could not be limbering	I could not have limbered
you could not have limbered
he could not have limbered
we could not have limbered
you could not have limbered
they could not have limbered	I could not have been limbering
you could not have been limbering
he could not have been limbering
we could not have been limbering
you could not have been limbering
they could not have been limbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I limber?
could you limber?
could he limber?
could we limber?
could you limber?
could they limber? 	could I be limbering?
could you be limbering?
could he be limbering?
could we be limbering?
could you be limbering?
could they be limbering? 	could I have limbered?
could you have limbered?
could he have limbered?
could we have limbered?
could you have limbered?
could they have limbered? 	could I have been limbering?
could you have been limbering?
could he have been limbering?
could we have been limbering?
could you have been limbering?
could they have been limbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not limber?
could you not limber?
could he not limber?
could we not limber?
could you not limber?
could they not limber? 	could I not be limbering?
could you not be limbering?
could he not be limbering?
could we not be limbering?
could you not be limbering?
could they not be limbering? 	could I not have limbered?
could you not have limbered?
could he not have limbered?
could we not have limbered?
could you not have limbered?
could they not have limbered? 	could I not have been limbering?
could you not have been limbering?
could he not have been limbering?
could we not have been limbering?
could you not have been limbering?
could they not have been limbering?