I can adumbrate you can adumbrate he can adumbrate we can adumbrate you can adumbrate they can adumbrate
V-ing form
I can be adumbrating you can be adumbrating he can be adumbrating we can be adumbrating you can be adumbrating they can be adumbrating
Perfect
I can have adumbrated you can have adumbrated he can have adumbrated we can have adumbrated you can have adumbrated they can have adumbrated
V-ing perfect
I can have been adumbrating you can have been adumbrating he can have been adumbrating we can have been adumbrating you can have been adumbrating they can have been adumbrating
Negation
Simple form
I can't adumbrate you can't adumbrate he can't adumbrate we can't adumbrate you can't adumbrate they can't adumbrate
V-ing form
I can't be adumbrating you can't be adumbrating he can't be adumbrating we can't be adumbrating you can't be adumbrating they can't be adumbrating
Perfect
I can't have adumbrated you can't have adumbrated he can't have adumbrated we can't have adumbrated you can't have adumbrated they can't have adumbrated
V-ing perfect
I can't have been adumbrating you can't have been adumbrating he can't have been adumbrating we can't have been adumbrating you can't have been adumbrating they can't have been adumbrating
Interrogative form
Simple form
can I adumbrate? can you adumbrate? can he adumbrate? can we adumbrate? can you adumbrate? can they adumbrate?
V-ing form
can I be adumbrating? can you be adumbrating? can he be adumbrating? can we be adumbrating? can you be adumbrating? can they be adumbrating?
Perfect
can I have adumbrated? can you have adumbrated? can he have adumbrated? can we have adumbrated? can you have adumbrated? can they have adumbrated?
V-ing perfect
can I have been adumbrating? can you have been adumbrating? can he have been adumbrating? can we have been adumbrating? can you have been adumbrating? can they have been adumbrating?
Interro-negative form
Simple form
can't I adumbrate? can't you adumbrate? can't he adumbrate? can't we adumbrate? can't you adumbrate? can't they adumbrate?
V-ing form
can't I be adumbrating? can't you be adumbrating? can't he be adumbrating? can't we be adumbrating? can't you be adumbrating? can't they be adumbrating?
Perfect
can't I have adumbrated? can't you have adumbrated? can't he have adumbrated? can't we have adumbrated? can't you have adumbrated? can't they have adumbrated?
V-ing perfect
can't I have been adumbrating? can't you have been adumbrating? can't he have been adumbrating? can't we have been adumbrating? can't you have been adumbrating? can't they have been adumbrating?