I can degrade you can degrade he can degrade we can degrade you can degrade they can degrade
V-ing form
I can be degrading you can be degrading he can be degrading we can be degrading you can be degrading they can be degrading
Perfect
I can have degraded you can have degraded he can have degraded we can have degraded you can have degraded they can have degraded
V-ing perfect
I can have been degrading you can have been degrading he can have been degrading we can have been degrading you can have been degrading they can have been degrading
Negation
Simple form
I can't degrade you can't degrade he can't degrade we can't degrade you can't degrade they can't degrade
V-ing form
I can't be degrading you can't be degrading he can't be degrading we can't be degrading you can't be degrading they can't be degrading
Perfect
I can't have degraded you can't have degraded he can't have degraded we can't have degraded you can't have degraded they can't have degraded
V-ing perfect
I can't have been degrading you can't have been degrading he can't have been degrading we can't have been degrading you can't have been degrading they can't have been degrading
Interrogative form
Simple form
can I degrade? can you degrade? can he degrade? can we degrade? can you degrade? can they degrade?
V-ing form
can I be degrading? can you be degrading? can he be degrading? can we be degrading? can you be degrading? can they be degrading?
Perfect
can I have degraded? can you have degraded? can he have degraded? can we have degraded? can you have degraded? can they have degraded?
V-ing perfect
can I have been degrading? can you have been degrading? can he have been degrading? can we have been degrading? can you have been degrading? can they have been degrading?
Interro-negative form
Simple form
can't I degrade? can't you degrade? can't he degrade? can't we degrade? can't you degrade? can't they degrade?
V-ing form
can't I be degrading? can't you be degrading? can't he be degrading? can't we be degrading? can't you be degrading? can't they be degrading?
Perfect
can't I have degraded? can't you have degraded? can't he have degraded? can't we have degraded? can't you have degraded? can't they have degraded?
V-ing perfect
can't I have been degrading? can't you have been degrading? can't he have been degrading? can't we have been degrading? can't you have been degrading? can't they have been degrading?