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