I could house-hunt you could house-hunt he could house-hunt we could house-hunt you could house-hunt they could house-hunt
V-ing form
I could be house-hunting you could be house-hunting he could be house-hunting we could be house-hunting you could be house-hunting they could be house-hunting
Perfect
I could have house-hunted you could have house-hunted he could have house-hunted we could have house-hunted you could have house-hunted they could have house-hunted
V-ing perfect
I could have been house-hunting you could have been house-hunting he could have been house-hunting we could have been house-hunting you could have been house-hunting they could have been house-hunting
Negation
Simple form
I could not house-hunt you could not house-hunt he could not house-hunt we could not house-hunt you could not house-hunt they could not house-hunt
V-ing form
I could not be house-hunting you could not be house-hunting he could not be house-hunting we could not be house-hunting you could not be house-hunting they could not be house-hunting
Perfect
I could not have house-hunted you could not have house-hunted he could not have house-hunted we could not have house-hunted you could not have house-hunted they could not have house-hunted
V-ing perfect
I could not have been house-hunting you could not have been house-hunting he could not have been house-hunting we could not have been house-hunting you could not have been house-hunting they could not have been house-hunting
Interrogative form
Simple form
could I house-hunt? could you house-hunt? could he house-hunt? could we house-hunt? could you house-hunt? could they house-hunt?
V-ing form
could I be house-hunting? could you be house-hunting? could he be house-hunting? could we be house-hunting? could you be house-hunting? could they be house-hunting?
Perfect
could I have house-hunted? could you have house-hunted? could he have house-hunted? could we have house-hunted? could you have house-hunted? could they have house-hunted?
V-ing perfect
could I have been house-hunting? could you have been house-hunting? could he have been house-hunting? could we have been house-hunting? could you have been house-hunting? could they have been house-hunting?
Interro-negative form
Simple form
could I not house-hunt? could you not house-hunt? could he not house-hunt? could we not house-hunt? could you not house-hunt? could they not house-hunt?
V-ing form
could I not be house-hunting? could you not be house-hunting? could he not be house-hunting? could we not be house-hunting? could you not be house-hunting? could they not be house-hunting?
Perfect
could I not have house-hunted? could you not have house-hunted? could he not have house-hunted? could we not have house-hunted? could you not have house-hunted? could they not have house-hunted?
V-ing perfect
could I not have been house-hunting? could you not have been house-hunting? could he not have been house-hunting? could we not have been house-hunting? could you not have been house-hunting? could they not have been house-hunting?