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