I could fraternize you could fraternize he could fraternize we could fraternize you could fraternize they could fraternize
V-ing form
I could be fraternizing you could be fraternizing he could be fraternizing we could be fraternizing you could be fraternizing they could be fraternizing
Perfect
I could have fraternized you could have fraternized he could have fraternized we could have fraternized you could have fraternized they could have fraternized
V-ing perfect
I could have been fraternizing you could have been fraternizing he could have been fraternizing we could have been fraternizing you could have been fraternizing they could have been fraternizing
Negation
Simple form
I could not fraternize you could not fraternize he could not fraternize we could not fraternize you could not fraternize they could not fraternize
V-ing form
I could not be fraternizing you could not be fraternizing he could not be fraternizing we could not be fraternizing you could not be fraternizing they could not be fraternizing
Perfect
I could not have fraternized you could not have fraternized he could not have fraternized we could not have fraternized you could not have fraternized they could not have fraternized
V-ing perfect
I could not have been fraternizing you could not have been fraternizing he could not have been fraternizing we could not have been fraternizing you could not have been fraternizing they could not have been fraternizing
Interrogative form
Simple form
could I fraternize? could you fraternize? could he fraternize? could we fraternize? could you fraternize? could they fraternize?
V-ing form
could I be fraternizing? could you be fraternizing? could he be fraternizing? could we be fraternizing? could you be fraternizing? could they be fraternizing?
Perfect
could I have fraternized? could you have fraternized? could he have fraternized? could we have fraternized? could you have fraternized? could they have fraternized?
V-ing perfect
could I have been fraternizing? could you have been fraternizing? could he have been fraternizing? could we have been fraternizing? could you have been fraternizing? could they have been fraternizing?
Interro-negative form
Simple form
could I not fraternize? could you not fraternize? could he not fraternize? could we not fraternize? could you not fraternize? could they not fraternize?
V-ing form
could I not be fraternizing? could you not be fraternizing? could he not be fraternizing? could we not be fraternizing? could you not be fraternizing? could they not be fraternizing?
Perfect
could I not have fraternized? could you not have fraternized? could he not have fraternized? could we not have fraternized? could you not have fraternized? could they not have fraternized?
V-ing perfect
could I not have been fraternizing? could you not have been fraternizing? could he not have been fraternizing? could we not have been fraternizing? could you not have been fraternizing? could they not have been fraternizing?