could degrade
Regular verb: degrade - degraded- degraded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could degrade
you could degrade
he could degrade
we could degrade
you could degrade
they could degrade 	I could be degrading
you could be degrading
he could be degrading
we could be degrading
you could be degrading
they could be degrading	I could have degraded
you could have degraded
he could have degraded
we could have degraded
you could have degraded
they could have degraded	I could have been degrading
you could have been degrading
he could have been degrading
we could have been degrading
you could have been degrading
they could have been degrading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not degrade
you could not degrade
he could not degrade
we could not degrade
you could not degrade
they could not degrade 	I could not be degrading
you could not be degrading
he could not be degrading
we could not be degrading
you could not be degrading
they could not be degrading	I could not have degraded
you could not have degraded
he could not have degraded
we could not have degraded
you could not have degraded
they could not have degraded	I could not have been degrading
you could not have been degrading
he could not have been degrading
we could not have been degrading
you could not have been degrading
they could not have been degrading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I degrade?
could you degrade?
could he degrade?
could we degrade?
could you degrade?
could they degrade? 	could I be degrading?
could you be degrading?
could he be degrading?
could we be degrading?
could you be degrading?
could they be degrading? 	could I have degraded?
could you have degraded?
could he have degraded?
could we have degraded?
could you have degraded?
could they have degraded? 	could I have been degrading?
could you have been degrading?
could he have been degrading?
could we have been degrading?
could you have been degrading?
could they have been degrading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not degrade?
could you not degrade?
could he not degrade?
could we not degrade?
could you not degrade?
could they not degrade? 	could I not be degrading?
could you not be degrading?
could he not be degrading?
could we not be degrading?
could you not be degrading?
could they not be degrading? 	could I not have degraded?
could you not have degraded?
could he not have degraded?
could we not have degraded?
could you not have degraded?
could they not have degraded? 	could I not have been degrading?
could you not have been degrading?
could he not have been degrading?
could we not have been degrading?
could you not have been degrading?
could they not have been degrading?