I must preauthorise you must preauthorise he must preauthorise we must preauthorise you must preauthorise they must preauthorise
V-ing form
I must be preauthorising you must be preauthorising he must be preauthorising we must be preauthorising you must be preauthorising they must be preauthorising
Perfect
I must have preauthorised you must have preauthorised he must have preauthorised we must have preauthorised you must have preauthorised they must have preauthorised
V-ing perfect
I must have been preauthorising you must have been preauthorising he must have been preauthorising we must have been preauthorising you must have been preauthorising they must have been preauthorising
Negation
Simple form
I mustn't preauthorise you mustn't preauthorise he mustn't preauthorise we mustn't preauthorise you mustn't preauthorise they mustn't preauthorise
V-ing form
I mustn't be preauthorising you mustn't be preauthorising he mustn't be preauthorising we mustn't be preauthorising you mustn't be preauthorising they mustn't be preauthorising
Perfect
I mustn't have preauthorised you mustn't have preauthorised he mustn't have preauthorised we mustn't have preauthorised you mustn't have preauthorised they mustn't have preauthorised
V-ing perfect
I mustn't have been preauthorising you mustn't have been preauthorising he mustn't have been preauthorising we mustn't have been preauthorising you mustn't have been preauthorising they mustn't have been preauthorising
Interrogative form
Simple form
must I preauthorise? must you preauthorise? must he preauthorise? must we preauthorise? must you preauthorise? must they preauthorise?
V-ing form
must I be preauthorising? must you be preauthorising? must he be preauthorising? must we be preauthorising? must you be preauthorising? must they be preauthorising?
Perfect
must I have preauthorised? must you have preauthorised? must he have preauthorised? must we have preauthorised? must you have preauthorised? must they have preauthorised?
V-ing perfect
must I have been preauthorising? must you have been preauthorising? must he have been preauthorising? must we have been preauthorising? must you have been preauthorising? must they have been preauthorising?
Interro-negative form
Simple form
mustn't I preauthorise? mustn't you preauthorise? mustn't he preauthorise? mustn't we preauthorise? mustn't you preauthorise? mustn't they preauthorise?
V-ing form
mustn't I be preauthorising? mustn't you be preauthorising? mustn't he be preauthorising? mustn't we be preauthorising? mustn't you be preauthorising? mustn't they be preauthorising?
Perfect
mustn't I have preauthorised? mustn't you have preauthorised? mustn't he have preauthorised? mustn't we have preauthorised? mustn't you have preauthorised? mustn't they have preauthorised?
V-ing perfect
mustn't I have been preauthorising? mustn't you have been preauthorising? mustn't he have been preauthorising? mustn't we have been preauthorising? mustn't you have been preauthorising? mustn't they have been preauthorising?