could umber
Regular verb: umber - umbered- umbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could umber
you could umber
she could umber
we could umber
you could umber
they could umber 	I could be umbering
you could be umbering
she could be umbering
we could be umbering
you could be umbering
they could be umbering	I could have umbered
you could have umbered
she could have umbered
we could have umbered
you could have umbered
they could have umbered	I could have been umbering
you could have been umbering
she could have been umbering
we could have been umbering
you could have been umbering
they could have been umbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't umber
you couldn't umber
she couldn't umber
we couldn't umber
you couldn't umber
they couldn't umber 	I couldn't be umbering
you couldn't be umbering
she couldn't be umbering
we couldn't be umbering
you couldn't be umbering
they couldn't be umbering	I couldn't have umbered
you couldn't have umbered
she couldn't have umbered
we couldn't have umbered
you couldn't have umbered
they couldn't have umbered	I couldn't have been umbering
you couldn't have been umbering
she couldn't have been umbering
we couldn't have been umbering
you couldn't have been umbering
they couldn't have been umbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I umber?
could you umber?
could she umber?
could we umber?
could you umber?
could they umber? 	could I be umbering?
could you be umbering?
could she be umbering?
could we be umbering?
could you be umbering?
could they be umbering? 	could I have umbered?
could you have umbered?
could she have umbered?
could we have umbered?
could you have umbered?
could they have umbered? 	could I have been umbering?
could you have been umbering?
could she have been umbering?
could we have been umbering?
could you have been umbering?
could they have been umbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I umber?
couldn't you umber?
couldn't she umber?
couldn't we umber?
couldn't you umber?
couldn't they umber? 	couldn't I be umbering?
couldn't you be umbering?
couldn't she be umbering?
couldn't we be umbering?
couldn't you be umbering?
couldn't they be umbering? 	couldn't I have umbered?
couldn't you have umbered?
couldn't she have umbered?
couldn't we have umbered?
couldn't you have umbered?
couldn't they have umbered? 	couldn't I have been umbering?
couldn't you have been umbering?
couldn't she have been umbering?
couldn't we have been umbering?
couldn't you have been umbering?
couldn't they have been umbering?