could derogate
Regular verb: derogate - derogated- derogated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could derogate
you could derogate
she could derogate
we could derogate
you could derogate
they could derogate 	I could be derogating
you could be derogating
she could be derogating
we could be derogating
you could be derogating
they could be derogating	I could have derogated
you could have derogated
she could have derogated
we could have derogated
you could have derogated
they could have derogated	I could have been derogating
you could have been derogating
she could have been derogating
we could have been derogating
you could have been derogating
they could have been derogating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't derogate
you couldn't derogate
she couldn't derogate
we couldn't derogate
you couldn't derogate
they couldn't derogate 	I couldn't be derogating
you couldn't be derogating
she couldn't be derogating
we couldn't be derogating
you couldn't be derogating
they couldn't be derogating	I couldn't have derogated
you couldn't have derogated
she couldn't have derogated
we couldn't have derogated
you couldn't have derogated
they couldn't have derogated	I couldn't have been derogating
you couldn't have been derogating
she couldn't have been derogating
we couldn't have been derogating
you couldn't have been derogating
they couldn't have been derogating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I derogate?
could you derogate?
could she derogate?
could we derogate?
could you derogate?
could they derogate? 	could I be derogating?
could you be derogating?
could she be derogating?
could we be derogating?
could you be derogating?
could they be derogating? 	could I have derogated?
could you have derogated?
could she have derogated?
could we have derogated?
could you have derogated?
could they have derogated? 	could I have been derogating?
could you have been derogating?
could she have been derogating?
could we have been derogating?
could you have been derogating?
could they have been derogating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I derogate?
couldn't you derogate?
couldn't she derogate?
couldn't we derogate?
couldn't you derogate?
couldn't they derogate? 	couldn't I be derogating?
couldn't you be derogating?
couldn't she be derogating?
couldn't we be derogating?
couldn't you be derogating?
couldn't they be derogating? 	couldn't I have derogated?
couldn't you have derogated?
couldn't she have derogated?
couldn't we have derogated?
couldn't you have derogated?
couldn't they have derogated? 	couldn't I have been derogating?
couldn't you have been derogating?
couldn't she have been derogating?
couldn't we have been derogating?
couldn't you have been derogating?
couldn't they have been derogating?