I must gauge you must gauge she must gauge we must gauge you must gauge they must gauge
V-ing form
I must be gauging you must be gauging she must be gauging we must be gauging you must be gauging they must be gauging
Perfect
I must have gauged you must have gauged she must have gauged we must have gauged you must have gauged they must have gauged
V-ing perfect
I must have been gauging you must have been gauging she must have been gauging we must have been gauging you must have been gauging they must have been gauging
Negation
Simple form
I must not gauge you must not gauge she must not gauge we must not gauge you must not gauge they must not gauge
V-ing form
I must not be gauging you must not be gauging she must not be gauging we must not be gauging you must not be gauging they must not be gauging
Perfect
I must not have gauged you must not have gauged she must not have gauged we must not have gauged you must not have gauged they must not have gauged
V-ing perfect
I must not have been gauging you must not have been gauging she must not have been gauging we must not have been gauging you must not have been gauging they must not have been gauging
Interrogative form
Simple form
must I gauge? must you gauge? must she gauge? must we gauge? must you gauge? must they gauge?
V-ing form
must I be gauging? must you be gauging? must she be gauging? must we be gauging? must you be gauging? must they be gauging?
Perfect
must I have gauged? must you have gauged? must she have gauged? must we have gauged? must you have gauged? must they have gauged?
V-ing perfect
must I have been gauging? must you have been gauging? must she have been gauging? must we have been gauging? must you have been gauging? must they have been gauging?
Interro-negative form
Simple form
must I not gauge? must you not gauge? must she not gauge? must we not gauge? must you not gauge? must they not gauge?
V-ing form
must I not be gauging? must you not be gauging? must she not be gauging? must we not be gauging? must you not be gauging? must they not be gauging?
Perfect
must I not have gauged? must you not have gauged? must she not have gauged? must we not have gauged? must you not have gauged? must they not have gauged?
V-ing perfect
must I not have been gauging? must you not have been gauging? must she not have been gauging? must we not have been gauging? must you not have been gauging? must they not have been gauging?