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