could blither
Regular verb: blither - blithered- blithered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could blither
you could blither
she could blither
we could blither
you could blither
they could blither 	I could be blithering
you could be blithering
she could be blithering
we could be blithering
you could be blithering
they could be blithering	I could have blithered
you could have blithered
she could have blithered
we could have blithered
you could have blithered
they could have blithered	I could have been blithering
you could have been blithering
she could have been blithering
we could have been blithering
you could have been blithering
they could have been blithering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't blither
you couldn't blither
she couldn't blither
we couldn't blither
you couldn't blither
they couldn't blither 	I couldn't be blithering
you couldn't be blithering
she couldn't be blithering
we couldn't be blithering
you couldn't be blithering
they couldn't be blithering	I couldn't have blithered
you couldn't have blithered
she couldn't have blithered
we couldn't have blithered
you couldn't have blithered
they couldn't have blithered	I couldn't have been blithering
you couldn't have been blithering
she couldn't have been blithering
we couldn't have been blithering
you couldn't have been blithering
they couldn't have been blithering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I blither?
could you blither?
could she blither?
could we blither?
could you blither?
could they blither? 	could I be blithering?
could you be blithering?
could she be blithering?
could we be blithering?
could you be blithering?
could they be blithering? 	could I have blithered?
could you have blithered?
could she have blithered?
could we have blithered?
could you have blithered?
could they have blithered? 	could I have been blithering?
could you have been blithering?
could she have been blithering?
could we have been blithering?
could you have been blithering?
could they have been blithering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I blither?
couldn't you blither?
couldn't she blither?
couldn't we blither?
couldn't you blither?
couldn't they blither? 	couldn't I be blithering?
couldn't you be blithering?
couldn't she be blithering?
couldn't we be blithering?
couldn't you be blithering?
couldn't they be blithering? 	couldn't I have blithered?
couldn't you have blithered?
couldn't she have blithered?
couldn't we have blithered?
couldn't you have blithered?
couldn't they have blithered? 	couldn't I have been blithering?
couldn't you have been blithering?
couldn't she have been blithering?
couldn't we have been blithering?
couldn't you have been blithering?
couldn't they have been blithering?