English verb conjugation
COULD UMBER

Regular verb: umber - umbered - umbered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?