I must argue you must argue she must argue we must argue you must argue they must argue
V-ing form
I must be arguing you must be arguing she must be arguing we must be arguing you must be arguing they must be arguing
Perfect
I must have argued you must have argued she must have argued we must have argued you must have argued they must have argued
V-ing perfect
I must have been arguing you must have been arguing she must have been arguing we must have been arguing you must have been arguing they must have been arguing
Negation
Simple form
I mustn't argue you mustn't argue she mustn't argue we mustn't argue you mustn't argue they mustn't argue
V-ing form
I mustn't be arguing you mustn't be arguing she mustn't be arguing we mustn't be arguing you mustn't be arguing they mustn't be arguing
Perfect
I mustn't have argued you mustn't have argued she mustn't have argued we mustn't have argued you mustn't have argued they mustn't have argued
V-ing perfect
I mustn't have been arguing you mustn't have been arguing she mustn't have been arguing we mustn't have been arguing you mustn't have been arguing they mustn't have been arguing
Interrogative form
Simple form
must I argue? must you argue? must she argue? must we argue? must you argue? must they argue?
V-ing form
must I be arguing? must you be arguing? must she be arguing? must we be arguing? must you be arguing? must they be arguing?
Perfect
must I have argued? must you have argued? must she have argued? must we have argued? must you have argued? must they have argued?
V-ing perfect
must I have been arguing? must you have been arguing? must she have been arguing? must we have been arguing? must you have been arguing? must they have been arguing?
Interro-negative form
Simple form
mustn't I argue? mustn't you argue? mustn't she argue? mustn't we argue? mustn't you argue? mustn't they argue?
V-ing form
mustn't I be arguing? mustn't you be arguing? mustn't she be arguing? mustn't we be arguing? mustn't you be arguing? mustn't they be arguing?
Perfect
mustn't I have argued? mustn't you have argued? mustn't she have argued? mustn't we have argued? mustn't you have argued? mustn't they have argued?
V-ing perfect
mustn't I have been arguing? mustn't you have been arguing? mustn't she have been arguing? mustn't we have been arguing? mustn't you have been arguing? mustn't they have been arguing?