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