could denitrify
Regular verb: denitrify - denitrified- denitrified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could denitrify
you could denitrify
she could denitrify
we could denitrify
you could denitrify
they could denitrify 	I could be denitrifying
you could be denitrifying
she could be denitrifying
we could be denitrifying
you could be denitrifying
they could be denitrifying	I could have denitrified
you could have denitrified
she could have denitrified
we could have denitrified
you could have denitrified
they could have denitrified	I could have been denitrifying
you could have been denitrifying
she could have been denitrifying
we could have been denitrifying
you could have been denitrifying
they could have been denitrifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not denitrify
you could not denitrify
she could not denitrify
we could not denitrify
you could not denitrify
they could not denitrify 	I could not be denitrifying
you could not be denitrifying
she could not be denitrifying
we could not be denitrifying
you could not be denitrifying
they could not be denitrifying	I could not have denitrified
you could not have denitrified
she could not have denitrified
we could not have denitrified
you could not have denitrified
they could not have denitrified	I could not have been denitrifying
you could not have been denitrifying
she could not have been denitrifying
we could not have been denitrifying
you could not have been denitrifying
they could not have been denitrifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I denitrify?
could you denitrify?
could she denitrify?
could we denitrify?
could you denitrify?
could they denitrify? 	could I be denitrifying?
could you be denitrifying?
could she be denitrifying?
could we be denitrifying?
could you be denitrifying?
could they be denitrifying? 	could I have denitrified?
could you have denitrified?
could she have denitrified?
could we have denitrified?
could you have denitrified?
could they have denitrified? 	could I have been denitrifying?
could you have been denitrifying?
could she have been denitrifying?
could we have been denitrifying?
could you have been denitrifying?
could they have been denitrifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not denitrify?
could you not denitrify?
could she not denitrify?
could we not denitrify?
could you not denitrify?
could they not denitrify? 	could I not be denitrifying?
could you not be denitrifying?
could she not be denitrifying?
could we not be denitrifying?
could you not be denitrifying?
could they not be denitrifying? 	could I not have denitrified?
could you not have denitrified?
could she not have denitrified?
could we not have denitrified?
could you not have denitrified?
could they not have denitrified? 	could I not have been denitrifying?
could you not have been denitrifying?
could she not have been denitrifying?
could we not have been denitrifying?
could you not have been denitrifying?
could they not have been denitrifying?