I could oppress you could oppress he could oppress we could oppress you could oppress they could oppress
V-ing form
I could be oppressing you could be oppressing he could be oppressing we could be oppressing you could be oppressing they could be oppressing
Perfect
I could have oppressed you could have oppressed he could have oppressed we could have oppressed you could have oppressed they could have oppressed
V-ing perfect
I could have been oppressing you could have been oppressing he could have been oppressing we could have been oppressing you could have been oppressing they could have been oppressing
Negation
Simple form
I could not oppress you could not oppress he could not oppress we could not oppress you could not oppress they could not oppress
V-ing form
I could not be oppressing you could not be oppressing he could not be oppressing we could not be oppressing you could not be oppressing they could not be oppressing
Perfect
I could not have oppressed you could not have oppressed he could not have oppressed we could not have oppressed you could not have oppressed they could not have oppressed
V-ing perfect
I could not have been oppressing you could not have been oppressing he could not have been oppressing we could not have been oppressing you could not have been oppressing they could not have been oppressing
Interrogative form
Simple form
could I oppress? could you oppress? could he oppress? could we oppress? could you oppress? could they oppress?
V-ing form
could I be oppressing? could you be oppressing? could he be oppressing? could we be oppressing? could you be oppressing? could they be oppressing?
Perfect
could I have oppressed? could you have oppressed? could he have oppressed? could we have oppressed? could you have oppressed? could they have oppressed?
V-ing perfect
could I have been oppressing? could you have been oppressing? could he have been oppressing? could we have been oppressing? could you have been oppressing? could they have been oppressing?
Interro-negative form
Simple form
could I not oppress? could you not oppress? could he not oppress? could we not oppress? could you not oppress? could they not oppress?
V-ing form
could I not be oppressing? could you not be oppressing? could he not be oppressing? could we not be oppressing? could you not be oppressing? could they not be oppressing?
Perfect
could I not have oppressed? could you not have oppressed? could he not have oppressed? could we not have oppressed? could you not have oppressed? could they not have oppressed?
V-ing perfect
could I not have been oppressing? could you not have been oppressing? could he not have been oppressing? could we not have been oppressing? could you not have been oppressing? could they not have been oppressing?