I could faint you could faint he could faint we could faint you could faint they could faint
V-ing form
I could be fainting you could be fainting he could be fainting we could be fainting you could be fainting they could be fainting
Perfect
I could have fainted you could have fainted he could have fainted we could have fainted you could have fainted they could have fainted
V-ing perfect
I could have been fainting you could have been fainting he could have been fainting we could have been fainting you could have been fainting they could have been fainting
Negation
Simple form
I could not faint you could not faint he could not faint we could not faint you could not faint they could not faint
V-ing form
I could not be fainting you could not be fainting he could not be fainting we could not be fainting you could not be fainting they could not be fainting
Perfect
I could not have fainted you could not have fainted he could not have fainted we could not have fainted you could not have fainted they could not have fainted
V-ing perfect
I could not have been fainting you could not have been fainting he could not have been fainting we could not have been fainting you could not have been fainting they could not have been fainting
Interrogative form
Simple form
could I faint? could you faint? could he faint? could we faint? could you faint? could they faint?
V-ing form
could I be fainting? could you be fainting? could he be fainting? could we be fainting? could you be fainting? could they be fainting?
Perfect
could I have fainted? could you have fainted? could he have fainted? could we have fainted? could you have fainted? could they have fainted?
V-ing perfect
could I have been fainting? could you have been fainting? could he have been fainting? could we have been fainting? could you have been fainting? could they have been fainting?
Interro-negative form
Simple form
could I not faint? could you not faint? could he not faint? could we not faint? could you not faint? could they not faint?
V-ing form
could I not be fainting? could you not be fainting? could he not be fainting? could we not be fainting? could you not be fainting? could they not be fainting?
Perfect
could I not have fainted? could you not have fainted? could he not have fainted? could we not have fainted? could you not have fainted? could they not have fainted?
V-ing perfect
could I not have been fainting? could you not have been fainting? could he not have been fainting? could we not have been fainting? could you not have been fainting? could they not have been fainting?