could adumbrate
Regular verb: adumbrate - adumbrated- adumbrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could adumbrate
you could adumbrate
he could adumbrate
we could adumbrate
you could adumbrate
they could adumbrate 	I could be adumbrating
you could be adumbrating
he could be adumbrating
we could be adumbrating
you could be adumbrating
they could be adumbrating	I could have adumbrated
you could have adumbrated
he 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
he 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 	Perfect 	V-ing perfect 	
I could not adumbrate
you could not adumbrate
he could not adumbrate
we could not adumbrate
you could not adumbrate
they could not adumbrate 	I could not be adumbrating
you could not be adumbrating
he could not be adumbrating
we could not be adumbrating
you could not be adumbrating
they could not be adumbrating	I could not have adumbrated
you could not have adumbrated
he could not have adumbrated
we could not have adumbrated
you could not have adumbrated
they could not have adumbrated	I could not have been adumbrating
you could not have been adumbrating
he could not have been adumbrating
we could not have been adumbrating
you could not have been adumbrating
they could not have been adumbrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I adumbrate?
could you adumbrate?
could he adumbrate?
could we adumbrate?
could you adumbrate?
could they adumbrate? 	could I be adumbrating?
could you be adumbrating?
could he be adumbrating?
could we be adumbrating?
could you be adumbrating?
could they be adumbrating? 	could I have adumbrated?
could you have adumbrated?
could he 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 he 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 	Perfect 	V-ing perfect 	
could I not adumbrate?
could you not adumbrate?
could he not adumbrate?
could we not adumbrate?
could you not adumbrate?
could they not adumbrate? 	could I not be adumbrating?
could you not be adumbrating?
could he not be adumbrating?
could we not be adumbrating?
could you not be adumbrating?
could they not be adumbrating? 	could I not have adumbrated?
could you not have adumbrated?
could he not have adumbrated?
could we not have adumbrated?
could you not have adumbrated?
could they not have adumbrated? 	could I not have been adumbrating?
could you not have been adumbrating?
could he not have been adumbrating?
could we not have been adumbrating?
could you not have been adumbrating?
could they not have been adumbrating?