English verb conjugation
COULD ADUMBRATE

Regular verb: adumbrate - adumbrated - adumbrated

Affirmation

Simple form	V-ing form
I could adumbrate you could adumbrate she could adumbrate we could adumbrate you could adumbrate they could adumbrate	I could be adumbrating you could be adumbrating she could be adumbrating we could be adumbrating you could be adumbrating they could be adumbrating
Perfect	V-ing perfect
I could have adumbrated you could have adumbrated she could have adumbrated we could have adumbrated you could have adumbrated they could have adumbrated	I could have been adumbrating you could have been adumbrating she could have been adumbrating we could have been adumbrating you could have been adumbrating they could have been adumbrating

Negation

Simple form	V-ing form
I couldn't adumbrate you couldn't adumbrate she couldn't adumbrate we couldn't adumbrate you couldn't adumbrate they couldn't adumbrate	I couldn't be adumbrating you couldn't be adumbrating she couldn't be adumbrating we couldn't be adumbrating you couldn't be adumbrating they couldn't be adumbrating
Perfect	V-ing perfect
I couldn't have adumbrated you couldn't have adumbrated she couldn't have adumbrated we couldn't have adumbrated you couldn't have adumbrated they couldn't have adumbrated	I couldn't have been adumbrating you couldn't have been adumbrating she couldn't have been adumbrating we couldn't have been adumbrating you couldn't have been adumbrating they couldn't have been adumbrating

Interrogative form

Simple form	V-ing form
could I adumbrate? could you adumbrate? could she adumbrate? could we adumbrate? could you adumbrate? could they adumbrate?	could I be adumbrating? could you be adumbrating? could she be adumbrating? could we be adumbrating? could you be adumbrating? could they be adumbrating?
Perfect	V-ing perfect
could I have adumbrated? could you have adumbrated? could she have adumbrated? could we have adumbrated? could you have adumbrated? could they have adumbrated?	could I have been adumbrating? could you have been adumbrating? could she have been adumbrating? could we have been adumbrating? could you have been adumbrating? could they have been adumbrating?

Interro-negative form

Simple form	V-ing form
couldn't I adumbrate? couldn't you adumbrate? couldn't she adumbrate? couldn't we adumbrate? couldn't you adumbrate? couldn't they adumbrate?	couldn't I be adumbrating? couldn't you be adumbrating? couldn't she be adumbrating? couldn't we be adumbrating? couldn't you be adumbrating? couldn't they be adumbrating?
Perfect	V-ing perfect
couldn't I have adumbrated? couldn't you have adumbrated? couldn't she have adumbrated? couldn't we have adumbrated? couldn't you have adumbrated? couldn't they have adumbrated?	couldn't I have been adumbrating? couldn't you have been adumbrating? couldn't she have been adumbrating? couldn't we have been adumbrating? couldn't you have been adumbrating? couldn't they have been adumbrating?