could shimmer
Regular verb: shimmer - shimmered- shimmered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shimmer
you could shimmer
he could shimmer
we could shimmer
you could shimmer
they could shimmer 	I could be shimmering
you could be shimmering
he could be shimmering
we could be shimmering
you could be shimmering
they could be shimmering	I could have shimmered
you could have shimmered
he could have shimmered
we could have shimmered
you could have shimmered
they could have shimmered	I could have been shimmering
you could have been shimmering
he could have been shimmering
we could have been shimmering
you could have been shimmering
they could have been shimmering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not shimmer
you could not shimmer
he could not shimmer
we could not shimmer
you could not shimmer
they could not shimmer 	I could not be shimmering
you could not be shimmering
he could not be shimmering
we could not be shimmering
you could not be shimmering
they could not be shimmering	I could not have shimmered
you could not have shimmered
he could not have shimmered
we could not have shimmered
you could not have shimmered
they could not have shimmered	I could not have been shimmering
you could not have been shimmering
he could not have been shimmering
we could not have been shimmering
you could not have been shimmering
they could not have been shimmering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shimmer?
could you shimmer?
could he shimmer?
could we shimmer?
could you shimmer?
could they shimmer? 	could I be shimmering?
could you be shimmering?
could he be shimmering?
could we be shimmering?
could you be shimmering?
could they be shimmering? 	could I have shimmered?
could you have shimmered?
could he have shimmered?
could we have shimmered?
could you have shimmered?
could they have shimmered? 	could I have been shimmering?
could you have been shimmering?
could he have been shimmering?
could we have been shimmering?
could you have been shimmering?
could they have been shimmering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not shimmer?
could you not shimmer?
could he not shimmer?
could we not shimmer?
could you not shimmer?
could they not shimmer? 	could I not be shimmering?
could you not be shimmering?
could he not be shimmering?
could we not be shimmering?
could you not be shimmering?
could they not be shimmering? 	could I not have shimmered?
could you not have shimmered?
could he not have shimmered?
could we not have shimmered?
could you not have shimmered?
could they not have shimmered? 	could I not have been shimmering?
could you not have been shimmering?
could he not have been shimmering?
could we not have been shimmering?
could you not have been shimmering?
could they not have been shimmering?