could denigrate
Regular verb: denigrate - denigrated- denigrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could denigrate
you could denigrate
she could denigrate
we could denigrate
you could denigrate
they could denigrate 	I could be denigrating
you could be denigrating
she could be denigrating
we could be denigrating
you could be denigrating
they could be denigrating	I could have denigrated
you could have denigrated
she could have denigrated
we could have denigrated
you could have denigrated
they could have denigrated	I could have been denigrating
you could have been denigrating
she could have been denigrating
we could have been denigrating
you could have been denigrating
they could have been denigrating	

Negation 	
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I could not denigrate
you could not denigrate
she could not denigrate
we could not denigrate
you could not denigrate
they could not denigrate 	I could not be denigrating
you could not be denigrating
she could not be denigrating
we could not be denigrating
you could not be denigrating
they could not be denigrating	I could not have denigrated
you could not have denigrated
she could not have denigrated
we could not have denigrated
you could not have denigrated
they could not have denigrated	I could not have been denigrating
you could not have been denigrating
she could not have been denigrating
we could not have been denigrating
you could not have been denigrating
they could not have been denigrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I denigrate?
could you denigrate?
could she denigrate?
could we denigrate?
could you denigrate?
could they denigrate? 	could I be denigrating?
could you be denigrating?
could she be denigrating?
could we be denigrating?
could you be denigrating?
could they be denigrating? 	could I have denigrated?
could you have denigrated?
could she have denigrated?
could we have denigrated?
could you have denigrated?
could they have denigrated? 	could I have been denigrating?
could you have been denigrating?
could she have been denigrating?
could we have been denigrating?
could you have been denigrating?
could they have been denigrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not denigrate?
could you not denigrate?
could she not denigrate?
could we not denigrate?
could you not denigrate?
could they not denigrate? 	could I not be denigrating?
could you not be denigrating?
could she not be denigrating?
could we not be denigrating?
could you not be denigrating?
could they not be denigrating? 	could I not have denigrated?
could you not have denigrated?
could she not have denigrated?
could we not have denigrated?
could you not have denigrated?
could they not have denigrated? 	could I not have been denigrating?
could you not have been denigrating?
could she not have been denigrating?
could we not have been denigrating?
could you not have been denigrating?
could they not have been denigrating?