I could oppress you could oppress she could oppress we could oppress you could oppress they could oppress
V-ing form
I could be oppressing you could be oppressing she could be oppressing we could be oppressing you could be oppressing they could be oppressing
Perfect
I could have oppressed you could have oppressed she 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 she could have been oppressing we could have been oppressing you could have been oppressing they could have been oppressing
Negation
Simple form
I couldn't oppress you couldn't oppress she couldn't oppress we couldn't oppress you couldn't oppress they couldn't oppress
V-ing form
I couldn't be oppressing you couldn't be oppressing she couldn't be oppressing we couldn't be oppressing you couldn't be oppressing they couldn't be oppressing
Perfect
I couldn't have oppressed you couldn't have oppressed she couldn't have oppressed we couldn't have oppressed you couldn't have oppressed they couldn't have oppressed
V-ing perfect
I couldn't have been oppressing you couldn't have been oppressing she couldn't have been oppressing we couldn't have been oppressing you couldn't have been oppressing they couldn't have been oppressing
Interrogative form
Simple form
could I oppress? could you oppress? could she oppress? could we oppress? could you oppress? could they oppress?
V-ing form
could I be oppressing? could you be oppressing? could she be oppressing? could we be oppressing? could you be oppressing? could they be oppressing?
Perfect
could I have oppressed? could you have oppressed? could she 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 she have been oppressing? could we have been oppressing? could you have been oppressing? could they have been oppressing?
Interro-negative form
Simple form
couldn't I oppress? couldn't you oppress? couldn't she oppress? couldn't we oppress? couldn't you oppress? couldn't they oppress?
V-ing form
couldn't I be oppressing? couldn't you be oppressing? couldn't she be oppressing? couldn't we be oppressing? couldn't you be oppressing? couldn't they be oppressing?
Perfect
couldn't I have oppressed? couldn't you have oppressed? couldn't she have oppressed? couldn't we have oppressed? couldn't you have oppressed? couldn't they have oppressed?
V-ing perfect
couldn't I have been oppressing? couldn't you have been oppressing? couldn't she have been oppressing? couldn't we have been oppressing? couldn't you have been oppressing? couldn't they have been oppressing?