I could advocate you could advocate he could advocate we could advocate you could advocate they could advocate
V-ing form
I could be advocating you could be advocating he could be advocating we could be advocating you could be advocating they could be advocating
Perfect
I could have advocated you could have advocated he could have advocated we could have advocated you could have advocated they could have advocated
V-ing perfect
I could have been advocating you could have been advocating he could have been advocating we could have been advocating you could have been advocating they could have been advocating
Negation
Simple form
I could not advocate you could not advocate he could not advocate we could not advocate you could not advocate they could not advocate
V-ing form
I could not be advocating you could not be advocating he could not be advocating we could not be advocating you could not be advocating they could not be advocating
Perfect
I could not have advocated you could not have advocated he could not have advocated we could not have advocated you could not have advocated they could not have advocated
V-ing perfect
I could not have been advocating you could not have been advocating he could not have been advocating we could not have been advocating you could not have been advocating they could not have been advocating
Interrogative form
Simple form
could I advocate? could you advocate? could he advocate? could we advocate? could you advocate? could they advocate?
V-ing form
could I be advocating? could you be advocating? could he be advocating? could we be advocating? could you be advocating? could they be advocating?
Perfect
could I have advocated? could you have advocated? could he have advocated? could we have advocated? could you have advocated? could they have advocated?
V-ing perfect
could I have been advocating? could you have been advocating? could he have been advocating? could we have been advocating? could you have been advocating? could they have been advocating?
Interro-negative form
Simple form
could I not advocate? could you not advocate? could he not advocate? could we not advocate? could you not advocate? could they not advocate?
V-ing form
could I not be advocating? could you not be advocating? could he not be advocating? could we not be advocating? could you not be advocating? could they not be advocating?
Perfect
could I not have advocated? could you not have advocated? could he not have advocated? could we not have advocated? could you not have advocated? could they not have advocated?
V-ing perfect
could I not have been advocating? could you not have been advocating? could he not have been advocating? could we not have been advocating? could you not have been advocating? could they not have been advocating?