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