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 couldn't air-ship you couldn't air-ship he couldn't air-ship we couldn't air-ship you couldn't air-ship they couldn't air-ship
V-ing form
I couldn't be air-shiping you couldn't be air-shiping he couldn't be air-shiping we couldn't be air-shiping you couldn't be air-shiping they couldn't be air-shiping
Perfect
I couldn't have air-shiped you couldn't have air-shiped he couldn't have air-shiped we couldn't have air-shiped you couldn't have air-shiped they couldn't have air-shiped
V-ing perfect
I couldn't have been air-shiping you couldn't have been air-shiping he couldn't have been air-shiping we couldn't have been air-shiping you couldn't have been air-shiping they couldn't 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
couldn't I air-ship? couldn't you air-ship? couldn't he air-ship? couldn't we air-ship? couldn't you air-ship? couldn't they air-ship?
V-ing form
couldn't I be air-shiping? couldn't you be air-shiping? couldn't he be air-shiping? couldn't we be air-shiping? couldn't you be air-shiping? couldn't they be air-shiping?
Perfect
couldn't I have air-shiped? couldn't you have air-shiped? couldn't he have air-shiped? couldn't we have air-shiped? couldn't you have air-shiped? couldn't they have air-shiped?
V-ing perfect
couldn't I have been air-shiping? couldn't you have been air-shiping? couldn't he have been air-shiping? couldn't we have been air-shiping? couldn't you have been air-shiping? couldn't they have been air-shiping?