could scabbard
Regular verb: scabbard - scabbarded- scabbarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could scabbard
you could scabbard
she could scabbard
we could scabbard
you could scabbard
they could scabbard 	I could be scabbarding
you could be scabbarding
she could be scabbarding
we could be scabbarding
you could be scabbarding
they could be scabbarding	I could have scabbarded
you could have scabbarded
she could have scabbarded
we could have scabbarded
you could have scabbarded
they could have scabbarded	I could have been scabbarding
you could have been scabbarding
she could have been scabbarding
we could have been scabbarding
you could have been scabbarding
they could have been scabbarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't scabbard
you couldn't scabbard
she couldn't scabbard
we couldn't scabbard
you couldn't scabbard
they couldn't scabbard 	I couldn't be scabbarding
you couldn't be scabbarding
she couldn't be scabbarding
we couldn't be scabbarding
you couldn't be scabbarding
they couldn't be scabbarding	I couldn't have scabbarded
you couldn't have scabbarded
she couldn't have scabbarded
we couldn't have scabbarded
you couldn't have scabbarded
they couldn't have scabbarded	I couldn't have been scabbarding
you couldn't have been scabbarding
she couldn't have been scabbarding
we couldn't have been scabbarding
you couldn't have been scabbarding
they couldn't have been scabbarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I scabbard?
could you scabbard?
could she scabbard?
could we scabbard?
could you scabbard?
could they scabbard? 	could I be scabbarding?
could you be scabbarding?
could she be scabbarding?
could we be scabbarding?
could you be scabbarding?
could they be scabbarding? 	could I have scabbarded?
could you have scabbarded?
could she have scabbarded?
could we have scabbarded?
could you have scabbarded?
could they have scabbarded? 	could I have been scabbarding?
could you have been scabbarding?
could she have been scabbarding?
could we have been scabbarding?
could you have been scabbarding?
could they have been scabbarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I scabbard?
couldn't you scabbard?
couldn't she scabbard?
couldn't we scabbard?
couldn't you scabbard?
couldn't they scabbard? 	couldn't I be scabbarding?
couldn't you be scabbarding?
couldn't she be scabbarding?
couldn't we be scabbarding?
couldn't you be scabbarding?
couldn't they be scabbarding? 	couldn't I have scabbarded?
couldn't you have scabbarded?
couldn't she have scabbarded?
couldn't we have scabbarded?
couldn't you have scabbarded?
couldn't they have scabbarded? 	couldn't I have been scabbarding?
couldn't you have been scabbarding?
couldn't she have been scabbarding?
couldn't we have been scabbarding?
couldn't you have been scabbarding?
couldn't they have been scabbarding?