I must charge you must charge she must charge we must charge you must charge they must charge
V-ing form
I must be charging you must be charging she must be charging we must be charging you must be charging they must be charging
Perfect
I must have charged you must have charged she must have charged we must have charged you must have charged they must have charged
V-ing perfect
I must have been charging you must have been charging she must have been charging we must have been charging you must have been charging they must have been charging
Negation
Simple form
I must not charge you must not charge she must not charge we must not charge you must not charge they must not charge
V-ing form
I must not be charging you must not be charging she must not be charging we must not be charging you must not be charging they must not be charging
Perfect
I must not have charged you must not have charged she must not have charged we must not have charged you must not have charged they must not have charged
V-ing perfect
I must not have been charging you must not have been charging she must not have been charging we must not have been charging you must not have been charging they must not have been charging
Interrogative form
Simple form
must I charge? must you charge? must she charge? must we charge? must you charge? must they charge?
V-ing form
must I be charging? must you be charging? must she be charging? must we be charging? must you be charging? must they be charging?
Perfect
must I have charged? must you have charged? must she have charged? must we have charged? must you have charged? must they have charged?
V-ing perfect
must I have been charging? must you have been charging? must she have been charging? must we have been charging? must you have been charging? must they have been charging?
Interro-negative form
Simple form
must I not charge? must you not charge? must she not charge? must we not charge? must you not charge? must they not charge?
V-ing form
must I not be charging? must you not be charging? must she not be charging? must we not be charging? must you not be charging? must they not be charging?
Perfect
must I not have charged? must you not have charged? must she not have charged? must we not have charged? must you not have charged? must they not have charged?
V-ing perfect
must I not have been charging? must you not have been charging? must she not have been charging? must we not have been charging? must you not have been charging? must they not have been charging?