I could antecede you could antecede he could antecede we could antecede you could antecede they could antecede
V-ing form
I could be anteceding you could be anteceding he could be anteceding we could be anteceding you could be anteceding they could be anteceding
Perfect
I could have anteceded you could have anteceded he could have anteceded we could have anteceded you could have anteceded they could have anteceded
V-ing perfect
I could have been anteceding you could have been anteceding he could have been anteceding we could have been anteceding you could have been anteceding they could have been anteceding
Negation
Simple form
I could not antecede you could not antecede he could not antecede we could not antecede you could not antecede they could not antecede
V-ing form
I could not be anteceding you could not be anteceding he could not be anteceding we could not be anteceding you could not be anteceding they could not be anteceding
Perfect
I could not have anteceded you could not have anteceded he could not have anteceded we could not have anteceded you could not have anteceded they could not have anteceded
V-ing perfect
I could not have been anteceding you could not have been anteceding he could not have been anteceding we could not have been anteceding you could not have been anteceding they could not have been anteceding
Interrogative form
Simple form
could I antecede? could you antecede? could he antecede? could we antecede? could you antecede? could they antecede?
V-ing form
could I be anteceding? could you be anteceding? could he be anteceding? could we be anteceding? could you be anteceding? could they be anteceding?
Perfect
could I have anteceded? could you have anteceded? could he have anteceded? could we have anteceded? could you have anteceded? could they have anteceded?
V-ing perfect
could I have been anteceding? could you have been anteceding? could he have been anteceding? could we have been anteceding? could you have been anteceding? could they have been anteceding?
Interro-negative form
Simple form
could I not antecede? could you not antecede? could he not antecede? could we not antecede? could you not antecede? could they not antecede?
V-ing form
could I not be anteceding? could you not be anteceding? could he not be anteceding? could we not be anteceding? could you not be anteceding? could they not be anteceding?
Perfect
could I not have anteceded? could you not have anteceded? could he not have anteceded? could we not have anteceded? could you not have anteceded? could they not have anteceded?
V-ing perfect
could I not have been anteceding? could you not have been anteceding? could he not have been anteceding? could we not have been anteceding? could you not have been anteceding? could they not have been anteceding?