English verb conjugation
MUST SNEAK

Irregular verb: sneak - sneaked, snuck - snuck

Affirmation

Simple form	V-ing form
I must sneak you must sneak he must sneak we must sneak you must sneak they must sneak	I must be sneaking you must be sneaking he must be sneaking we must be sneaking you must be sneaking they must be sneaking
Perfect	V-ing perfect
I must have snuck you must have snuck he must have snuck we must have snuck you must have snuck they must have snuck	I must have been sneaking you must have been sneaking he must have been sneaking we must have been sneaking you must have been sneaking they must have been sneaking

Negation

Simple form	V-ing form
I mustn't sneak you mustn't sneak he mustn't sneak we mustn't sneak you mustn't sneak they mustn't sneak	I mustn't be sneaking you mustn't be sneaking he mustn't be sneaking we mustn't be sneaking you mustn't be sneaking they mustn't be sneaking
Perfect	V-ing perfect
I mustn't have snuck you mustn't have snuck he mustn't have snuck we mustn't have snuck you mustn't have snuck they mustn't have snuck	I mustn't have been sneaking you mustn't have been sneaking he mustn't have been sneaking we mustn't have been sneaking you mustn't have been sneaking they mustn't have been sneaking

Interrogative form

Simple form	V-ing form
must I sneak? must you sneak? must he sneak? must we sneak? must you sneak? must they sneak?	must I be sneaking? must you be sneaking? must he be sneaking? must we be sneaking? must you be sneaking? must they be sneaking?
Perfect	V-ing perfect
must I have snuck? must you have snuck? must he have snuck? must we have snuck? must you have snuck? must they have snuck?	must I have been sneaking? must you have been sneaking? must he have been sneaking? must we have been sneaking? must you have been sneaking? must they have been sneaking?

Interro-negative form

Simple form	V-ing form
mustn't I sneak? mustn't you sneak? mustn't he sneak? mustn't we sneak? mustn't you sneak? mustn't they sneak?	mustn't I be sneaking? mustn't you be sneaking? mustn't he be sneaking? mustn't we be sneaking? mustn't you be sneaking? mustn't they be sneaking?
Perfect	V-ing perfect
mustn't I have snuck? mustn't you have snuck? mustn't he have snuck? mustn't we have snuck? mustn't you have snuck? mustn't they have snuck?	mustn't I have been sneaking? mustn't you have been sneaking? mustn't he have been sneaking? mustn't we have been sneaking? mustn't you have been sneaking? mustn't they have been sneaking?