I must snoop you must snoop she must snoop we must snoop you must snoop they must snoop
V-ing form
I must be snooping you must be snooping she must be snooping we must be snooping you must be snooping they must be snooping
Perfect
I must have snooped you must have snooped she 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 she must have been snooping we must have been snooping you must have been snooping they must have been snooping
Negation
Simple form
I must not snoop you must not snoop she must not snoop we must not snoop you must not snoop they must not snoop
V-ing form
I must not be snooping you must not be snooping she must not be snooping we must not be snooping you must not be snooping they must not be snooping
Perfect
I must not have snooped you must not have snooped she must not have snooped we must not have snooped you must not have snooped they must not have snooped
V-ing perfect
I must not have been snooping you must not have been snooping she must not have been snooping we must not have been snooping you must not have been snooping they must not have been snooping
Interrogative form
Simple form
must I snoop? must you snoop? must she snoop? must we snoop? must you snoop? must they snoop?
V-ing form
must I be snooping? must you be snooping? must she be snooping? must we be snooping? must you be snooping? must they be snooping?
Perfect
must I have snooped? must you have snooped? must she 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 she have been snooping? must we have been snooping? must you have been snooping? must they have been snooping?
Interro-negative form
Simple form
must I not snoop? must you not snoop? must she not snoop? must we not snoop? must you not snoop? must they not snoop?
V-ing form
must I not be snooping? must you not be snooping? must she not be snooping? must we not be snooping? must you not be snooping? must they not be snooping?
Perfect
must I not have snooped? must you not have snooped? must she not have snooped? must we not have snooped? must you not have snooped? must they not have snooped?
V-ing perfect
must I not have been snooping? must you not have been snooping? must she not have been snooping? must we not have been snooping? must you not have been snooping? must they not have been snooping?