English verb conjugation
COULD SUPERSEDE

Regular verb: supersede - superseded - superseded

Affirmation

Simple form	V-ing form
I could supersede you could supersede she could supersede we could supersede you could supersede they could supersede	I could be superseding you could be superseding she could be superseding we could be superseding you could be superseding they could be superseding
Perfect	V-ing perfect
I could have superseded you could have superseded she could have superseded we could have superseded you could have superseded they could have superseded	I could have been superseding you could have been superseding she could have been superseding we could have been superseding you could have been superseding they could have been superseding

Negation

Simple form	V-ing form
I couldn't supersede you couldn't supersede she couldn't supersede we couldn't supersede you couldn't supersede they couldn't supersede	I couldn't be superseding you couldn't be superseding she couldn't be superseding we couldn't be superseding you couldn't be superseding they couldn't be superseding
Perfect	V-ing perfect
I couldn't have superseded you couldn't have superseded she couldn't have superseded we couldn't have superseded you couldn't have superseded they couldn't have superseded	I couldn't have been superseding you couldn't have been superseding she couldn't have been superseding we couldn't have been superseding you couldn't have been superseding they couldn't have been superseding

Interrogative form

Simple form	V-ing form
could I supersede? could you supersede? could she supersede? could we supersede? could you supersede? could they supersede?	could I be superseding? could you be superseding? could she be superseding? could we be superseding? could you be superseding? could they be superseding?
Perfect	V-ing perfect
could I have superseded? could you have superseded? could she have superseded? could we have superseded? could you have superseded? could they have superseded?	could I have been superseding? could you have been superseding? could she have been superseding? could we have been superseding? could you have been superseding? could they have been superseding?

Interro-negative form

Simple form	V-ing form
couldn't I supersede? couldn't you supersede? couldn't she supersede? couldn't we supersede? couldn't you supersede? couldn't they supersede?	couldn't I be superseding? couldn't you be superseding? couldn't she be superseding? couldn't we be superseding? couldn't you be superseding? couldn't they be superseding?
Perfect	V-ing perfect
couldn't I have superseded? couldn't you have superseded? couldn't she have superseded? couldn't we have superseded? couldn't you have superseded? couldn't they have superseded?	couldn't I have been superseding? couldn't you have been superseding? couldn't she have been superseding? couldn't we have been superseding? couldn't you have been superseding? couldn't they have been superseding?