English verb conjugation
MUST CLUCK

Regular verb: cluck - clucked - clucked

Affirmation

Simple form	V-ing form
I must cluck you must cluck he must cluck we must cluck you must cluck they must cluck	I must be clucking you must be clucking he must be clucking we must be clucking you must be clucking they must be clucking
Perfect	V-ing perfect
I must have clucked you must have clucked he must have clucked we must have clucked you must have clucked they must have clucked	I must have been clucking you must have been clucking he must have been clucking we must have been clucking you must have been clucking they must have been clucking

Negation

Simple form	V-ing form
I must not cluck you must not cluck he must not cluck we must not cluck you must not cluck they must not cluck	I must not be clucking you must not be clucking he must not be clucking we must not be clucking you must not be clucking they must not be clucking
Perfect	V-ing perfect
I must not have clucked you must not have clucked he must not have clucked we must not have clucked you must not have clucked they must not have clucked	I must not have been clucking you must not have been clucking he must not have been clucking we must not have been clucking you must not have been clucking they must not have been clucking

Interrogative form

Simple form	V-ing form
must I cluck? must you cluck? must he cluck? must we cluck? must you cluck? must they cluck?	must I be clucking? must you be clucking? must he be clucking? must we be clucking? must you be clucking? must they be clucking?
Perfect	V-ing perfect
must I have clucked? must you have clucked? must he have clucked? must we have clucked? must you have clucked? must they have clucked?	must I have been clucking? must you have been clucking? must he have been clucking? must we have been clucking? must you have been clucking? must they have been clucking?

Interro-negative form

Simple form	V-ing form
must I not cluck? must you not cluck? must he not cluck? must we not cluck? must you not cluck? must they not cluck?	must I not be clucking? must you not be clucking? must he not be clucking? must we not be clucking? must you not be clucking? must they not be clucking?
Perfect	V-ing perfect
must I not have clucked? must you not have clucked? must he not have clucked? must we not have clucked? must you not have clucked? must they not have clucked?	must I not have been clucking? must you not have been clucking? must he not have been clucking? must we not have been clucking? must you not have been clucking? must they not have been clucking?