I could air-ship you could air-ship he could air-ship we could air-ship you could air-ship they could air-ship
V-ing form
I could be air-shiping you could be air-shiping he could be air-shiping we could be air-shiping you could be air-shiping they could be air-shiping
Perfect
I could have air-shiped you could have air-shiped he could have air-shiped we could have air-shiped you could have air-shiped they could have air-shiped
V-ing perfect
I could have been air-shiping you could have been air-shiping he could have been air-shiping we could have been air-shiping you could have been air-shiping they could have been air-shiping
Negation
Simple form
I could not air-ship you could not air-ship he could not air-ship we could not air-ship you could not air-ship they could not air-ship
V-ing form
I could not be air-shiping you could not be air-shiping he could not be air-shiping we could not be air-shiping you could not be air-shiping they could not be air-shiping
Perfect
I could not have air-shiped you could not have air-shiped he could not have air-shiped we could not have air-shiped you could not have air-shiped they could not have air-shiped
V-ing perfect
I could not have been air-shiping you could not have been air-shiping he could not have been air-shiping we could not have been air-shiping you could not have been air-shiping they could not have been air-shiping
Interrogative form
Simple form
could I air-ship? could you air-ship? could he air-ship? could we air-ship? could you air-ship? could they air-ship?
V-ing form
could I be air-shiping? could you be air-shiping? could he be air-shiping? could we be air-shiping? could you be air-shiping? could they be air-shiping?
Perfect
could I have air-shiped? could you have air-shiped? could he have air-shiped? could we have air-shiped? could you have air-shiped? could they have air-shiped?
V-ing perfect
could I have been air-shiping? could you have been air-shiping? could he have been air-shiping? could we have been air-shiping? could you have been air-shiping? could they have been air-shiping?
Interro-negative form
Simple form
could I not air-ship? could you not air-ship? could he not air-ship? could we not air-ship? could you not air-ship? could they not air-ship?
V-ing form
could I not be air-shiping? could you not be air-shiping? could he not be air-shiping? could we not be air-shiping? could you not be air-shiping? could they not be air-shiping?
Perfect
could I not have air-shiped? could you not have air-shiped? could he not have air-shiped? could we not have air-shiped? could you not have air-shiped? could they not have air-shiped?
V-ing perfect
could I not have been air-shiping? could you not have been air-shiping? could he not have been air-shiping? could we not have been air-shiping? could you not have been air-shiping? could they not have been air-shiping?