could saber
Regular verb: saber - sabered- sabered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could saber
you could saber
she could saber
we could saber
you could saber
they could saber 	I could be sabering
you could be sabering
she could be sabering
we could be sabering
you could be sabering
they could be sabering	I could have sabered
you could have sabered
she could have sabered
we could have sabered
you could have sabered
they could have sabered	I could have been sabering
you could have been sabering
she could have been sabering
we could have been sabering
you could have been sabering
they could have been sabering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't saber
you couldn't saber
she couldn't saber
we couldn't saber
you couldn't saber
they couldn't saber 	I couldn't be sabering
you couldn't be sabering
she couldn't be sabering
we couldn't be sabering
you couldn't be sabering
they couldn't be sabering	I couldn't have sabered
you couldn't have sabered
she couldn't have sabered
we couldn't have sabered
you couldn't have sabered
they couldn't have sabered	I couldn't have been sabering
you couldn't have been sabering
she couldn't have been sabering
we couldn't have been sabering
you couldn't have been sabering
they couldn't have been sabering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I saber?
could you saber?
could she saber?
could we saber?
could you saber?
could they saber? 	could I be sabering?
could you be sabering?
could she be sabering?
could we be sabering?
could you be sabering?
could they be sabering? 	could I have sabered?
could you have sabered?
could she have sabered?
could we have sabered?
could you have sabered?
could they have sabered? 	could I have been sabering?
could you have been sabering?
could she have been sabering?
could we have been sabering?
could you have been sabering?
could they have been sabering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I saber?
couldn't you saber?
couldn't she saber?
couldn't we saber?
couldn't you saber?
couldn't they saber? 	couldn't I be sabering?
couldn't you be sabering?
couldn't she be sabering?
couldn't we be sabering?
couldn't you be sabering?
couldn't they be sabering? 	couldn't I have sabered?
couldn't you have sabered?
couldn't she have sabered?
couldn't we have sabered?
couldn't you have sabered?
couldn't they have sabered? 	couldn't I have been sabering?
couldn't you have been sabering?
couldn't she have been sabering?
couldn't we have been sabering?
couldn't you have been sabering?
couldn't they have been sabering?