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