English verb conjugation
MUST SHUCK

Regular verb: shuck - shucked - shucked

Affirmation

Simple form	V-ing form
I must shuck you must shuck he must shuck we must shuck you must shuck they must shuck	I must be shucking you must be shucking he must be shucking we must be shucking you must be shucking they must be shucking
Perfect	V-ing perfect
I must have shucked you must have shucked he must have shucked we must have shucked you must have shucked they must have shucked	I must have been shucking you must have been shucking he must have been shucking we must have been shucking you must have been shucking they must have been shucking

Negation

Simple form	V-ing form
I mustn't shuck you mustn't shuck he mustn't shuck we mustn't shuck you mustn't shuck they mustn't shuck	I mustn't be shucking you mustn't be shucking he mustn't be shucking we mustn't be shucking you mustn't be shucking they mustn't be shucking
Perfect	V-ing perfect
I mustn't have shucked you mustn't have shucked he mustn't have shucked we mustn't have shucked you mustn't have shucked they mustn't have shucked	I mustn't have been shucking you mustn't have been shucking he mustn't have been shucking we mustn't have been shucking you mustn't have been shucking they mustn't have been shucking

Interrogative form

Simple form	V-ing form
must I shuck? must you shuck? must he shuck? must we shuck? must you shuck? must they shuck?	must I be shucking? must you be shucking? must he be shucking? must we be shucking? must you be shucking? must they be shucking?
Perfect	V-ing perfect
must I have shucked? must you have shucked? must he have shucked? must we have shucked? must you have shucked? must they have shucked?	must I have been shucking? must you have been shucking? must he have been shucking? must we have been shucking? must you have been shucking? must they have been shucking?

Interro-negative form

Simple form	V-ing form
mustn't I shuck? mustn't you shuck? mustn't he shuck? mustn't we shuck? mustn't you shuck? mustn't they shuck?	mustn't I be shucking? mustn't you be shucking? mustn't he be shucking? mustn't we be shucking? mustn't you be shucking? mustn't they be shucking?
Perfect	V-ing perfect
mustn't I have shucked? mustn't you have shucked? mustn't he have shucked? mustn't we have shucked? mustn't you have shucked? mustn't they have shucked?	mustn't I have been shucking? mustn't you have been shucking? mustn't he have been shucking? mustn't we have been shucking? mustn't you have been shucking? mustn't they have been shucking?