I could convect you could convect he could convect we could convect you could convect they could convect
V-ing form
I could be convecting you could be convecting he could be convecting we could be convecting you could be convecting they could be convecting
Perfect
I could have convected you could have convected he could have convected we could have convected you could have convected they could have convected
V-ing perfect
I could have been convecting you could have been convecting he could have been convecting we could have been convecting you could have been convecting they could have been convecting
Negation
Simple form
I could not convect you could not convect he could not convect we could not convect you could not convect they could not convect
V-ing form
I could not be convecting you could not be convecting he could not be convecting we could not be convecting you could not be convecting they could not be convecting
Perfect
I could not have convected you could not have convected he could not have convected we could not have convected you could not have convected they could not have convected
V-ing perfect
I could not have been convecting you could not have been convecting he could not have been convecting we could not have been convecting you could not have been convecting they could not have been convecting
Interrogative form
Simple form
could I convect? could you convect? could he convect? could we convect? could you convect? could they convect?
V-ing form
could I be convecting? could you be convecting? could he be convecting? could we be convecting? could you be convecting? could they be convecting?
Perfect
could I have convected? could you have convected? could he have convected? could we have convected? could you have convected? could they have convected?
V-ing perfect
could I have been convecting? could you have been convecting? could he have been convecting? could we have been convecting? could you have been convecting? could they have been convecting?
Interro-negative form
Simple form
could I not convect? could you not convect? could he not convect? could we not convect? could you not convect? could they not convect?
V-ing form
could I not be convecting? could you not be convecting? could he not be convecting? could we not be convecting? could you not be convecting? could they not be convecting?
Perfect
could I not have convected? could you not have convected? could he not have convected? could we not have convected? could you not have convected? could they not have convected?
V-ing perfect
could I not have been convecting? could you not have been convecting? could he not have been convecting? could we not have been convecting? could you not have been convecting? could they not have been convecting?