I must refit you must refit he must refit we must refit you must refit they must refit
V-ing form
I must be refitting you must be refitting he must be refitting we must be refitting you must be refitting they must be refitting
Perfect
I must have refit you must have refit he must have refit we must have refit you must have refit they must have refit
V-ing perfect
I must have been refitting you must have been refitting he must have been refitting we must have been refitting you must have been refitting they must have been refitting
Negation
Simple form
I must not refit you must not refit he must not refit we must not refit you must not refit they must not refit
V-ing form
I must not be refitting you must not be refitting he must not be refitting we must not be refitting you must not be refitting they must not be refitting
Perfect
I must not have refit you must not have refit he must not have refit we must not have refit you must not have refit they must not have refit
V-ing perfect
I must not have been refitting you must not have been refitting he must not have been refitting we must not have been refitting you must not have been refitting they must not have been refitting
Interrogative form
Simple form
must I refit? must you refit? must he refit? must we refit? must you refit? must they refit?
V-ing form
must I be refitting? must you be refitting? must he be refitting? must we be refitting? must you be refitting? must they be refitting?
Perfect
must I have refit? must you have refit? must he have refit? must we have refit? must you have refit? must they have refit?
V-ing perfect
must I have been refitting? must you have been refitting? must he have been refitting? must we have been refitting? must you have been refitting? must they have been refitting?
Interro-negative form
Simple form
must I not refit? must you not refit? must he not refit? must we not refit? must you not refit? must they not refit?
V-ing form
must I not be refitting? must you not be refitting? must he not be refitting? must we not be refitting? must you not be refitting? must they not be refitting?
Perfect
must I not have refit? must you not have refit? must he not have refit? must we not have refit? must you not have refit? must they not have refit?
V-ing perfect
must I not have been refitting? must you not have been refitting? must he not have been refitting? must we not have been refitting? must you not have been refitting? must they not have been refitting?