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