I could incur you could incur she could incur we could incur you could incur they could incur
V-ing form
I could be incurring you could be incurring she could be incurring we could be incurring you could be incurring they could be incurring
Perfect
I could have incurred you could have incurred she could have incurred we could have incurred you could have incurred they could have incurred
V-ing perfect
I could have been incurring you could have been incurring she could have been incurring we could have been incurring you could have been incurring they could have been incurring
Negation
Simple form
I could not incur you could not incur she could not incur we could not incur you could not incur they could not incur
V-ing form
I could not be incurring you could not be incurring she could not be incurring we could not be incurring you could not be incurring they could not be incurring
Perfect
I could not have incurred you could not have incurred she could not have incurred we could not have incurred you could not have incurred they could not have incurred
V-ing perfect
I could not have been incurring you could not have been incurring she could not have been incurring we could not have been incurring you could not have been incurring they could not have been incurring
Interrogative form
Simple form
could I incur? could you incur? could she incur? could we incur? could you incur? could they incur?
V-ing form
could I be incurring? could you be incurring? could she be incurring? could we be incurring? could you be incurring? could they be incurring?
Perfect
could I have incurred? could you have incurred? could she have incurred? could we have incurred? could you have incurred? could they have incurred?
V-ing perfect
could I have been incurring? could you have been incurring? could she have been incurring? could we have been incurring? could you have been incurring? could they have been incurring?
Interro-negative form
Simple form
could I not incur? could you not incur? could she not incur? could we not incur? could you not incur? could they not incur?
V-ing form
could I not be incurring? could you not be incurring? could she not be incurring? could we not be incurring? could you not be incurring? could they not be incurring?
Perfect
could I not have incurred? could you not have incurred? could she not have incurred? could we not have incurred? could you not have incurred? could they not have incurred?
V-ing perfect
could I not have been incurring? could you not have been incurring? could she not have been incurring? could we not have been incurring? could you not have been incurring? could they not have been incurring?