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 couldn't house-hunt you couldn't house-hunt he couldn't house-hunt we couldn't house-hunt you couldn't house-hunt they couldn't house-hunt
V-ing form
I couldn't be house-hunting you couldn't be house-hunting he couldn't be house-hunting we couldn't be house-hunting you couldn't be house-hunting they couldn't be house-hunting
Perfect
I couldn't have house-hunted you couldn't have house-hunted he couldn't have house-hunted we couldn't have house-hunted you couldn't have house-hunted they couldn't have house-hunted
V-ing perfect
I couldn't have been house-hunting you couldn't have been house-hunting he couldn't have been house-hunting we couldn't have been house-hunting you couldn't have been house-hunting they couldn't 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
couldn't I house-hunt? couldn't you house-hunt? couldn't he house-hunt? couldn't we house-hunt? couldn't you house-hunt? couldn't they house-hunt?
V-ing form
couldn't I be house-hunting? couldn't you be house-hunting? couldn't he be house-hunting? couldn't we be house-hunting? couldn't you be house-hunting? couldn't they be house-hunting?
Perfect
couldn't I have house-hunted? couldn't you have house-hunted? couldn't he have house-hunted? couldn't we have house-hunted? couldn't you have house-hunted? couldn't they have house-hunted?
V-ing perfect
couldn't I have been house-hunting? couldn't you have been house-hunting? couldn't he have been house-hunting? couldn't we have been house-hunting? couldn't you have been house-hunting? couldn't they have been house-hunting?