I could supersede you could supersede he could supersede we could supersede you could supersede they could supersede
V-ing form
I could be superseding you could be superseding he could be superseding we could be superseding you could be superseding they could be superseding
Perfect
I could have superseded you could have superseded he could have superseded we could have superseded you could have superseded they could have superseded
V-ing perfect
I could have been superseding you could have been superseding he could have been superseding we could have been superseding you could have been superseding they could have been superseding
Negation
Simple form
I could not supersede you could not supersede he could not supersede we could not supersede you could not supersede they could not supersede
V-ing form
I could not be superseding you could not be superseding he could not be superseding we could not be superseding you could not be superseding they could not be superseding
Perfect
I could not have superseded you could not have superseded he could not have superseded we could not have superseded you could not have superseded they could not have superseded
V-ing perfect
I could not have been superseding you could not have been superseding he could not have been superseding we could not have been superseding you could not have been superseding they could not have been superseding
Interrogative form
Simple form
could I supersede? could you supersede? could he supersede? could we supersede? could you supersede? could they supersede?
V-ing form
could I be superseding? could you be superseding? could he be superseding? could we be superseding? could you be superseding? could they be superseding?
Perfect
could I have superseded? could you have superseded? could he have superseded? could we have superseded? could you have superseded? could they have superseded?
V-ing perfect
could I have been superseding? could you have been superseding? could he have been superseding? could we have been superseding? could you have been superseding? could they have been superseding?
Interro-negative form
Simple form
could I not supersede? could you not supersede? could he not supersede? could we not supersede? could you not supersede? could they not supersede?
V-ing form
could I not be superseding? could you not be superseding? could he not be superseding? could we not be superseding? could you not be superseding? could they not be superseding?
Perfect
could I not have superseded? could you not have superseded? could he not have superseded? could we not have superseded? could you not have superseded? could they not have superseded?
V-ing perfect
could I not have been superseding? could you not have been superseding? could he not have been superseding? could we not have been superseding? could you not have been superseding? could they not have been superseding?