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