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 mustn't charge you mustn't charge she mustn't charge we mustn't charge you mustn't charge they mustn't charge
V-ing form
I mustn't be charging you mustn't be charging she mustn't be charging we mustn't be charging you mustn't be charging they mustn't be charging
Perfect
I mustn't have charged you mustn't have charged she mustn't have charged we mustn't have charged you mustn't have charged they mustn't have charged
V-ing perfect
I mustn't have been charging you mustn't have been charging she mustn't have been charging we mustn't have been charging you mustn't have been charging they mustn't 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
mustn't I charge? mustn't you charge? mustn't she charge? mustn't we charge? mustn't you charge? mustn't they charge?
V-ing form
mustn't I be charging? mustn't you be charging? mustn't she be charging? mustn't we be charging? mustn't you be charging? mustn't they be charging?
Perfect
mustn't I have charged? mustn't you have charged? mustn't she have charged? mustn't we have charged? mustn't you have charged? mustn't they have charged?
V-ing perfect
mustn't I have been charging? mustn't you have been charging? mustn't she have been charging? mustn't we have been charging? mustn't you have been charging? mustn't they have been charging?