English verb conjugation
MUST SILK

Regular verb: silk - silked - silked

Affirmation

Simple form	V-ing form
I must silk you must silk he must silk we must silk you must silk they must silk	I must be silking you must be silking he must be silking we must be silking you must be silking they must be silking
Perfect	V-ing perfect
I must have silked you must have silked he must have silked we must have silked you must have silked they must have silked	I must have been silking you must have been silking he must have been silking we must have been silking you must have been silking they must have been silking

Negation

Simple form	V-ing form
I must not silk you must not silk he must not silk we must not silk you must not silk they must not silk	I must not be silking you must not be silking he must not be silking we must not be silking you must not be silking they must not be silking
Perfect	V-ing perfect
I must not have silked you must not have silked he must not have silked we must not have silked you must not have silked they must not have silked	I must not have been silking you must not have been silking he must not have been silking we must not have been silking you must not have been silking they must not have been silking

Interrogative form

Simple form	V-ing form
must I silk? must you silk? must he silk? must we silk? must you silk? must they silk?	must I be silking? must you be silking? must he be silking? must we be silking? must you be silking? must they be silking?
Perfect	V-ing perfect
must I have silked? must you have silked? must he have silked? must we have silked? must you have silked? must they have silked?	must I have been silking? must you have been silking? must he have been silking? must we have been silking? must you have been silking? must they have been silking?

Interro-negative form

Simple form	V-ing form
must I not silk? must you not silk? must he not silk? must we not silk? must you not silk? must they not silk?	must I not be silking? must you not be silking? must he not be silking? must we not be silking? must you not be silking? must they not be silking?
Perfect	V-ing perfect
must I not have silked? must you not have silked? must he not have silked? must we not have silked? must you not have silked? must they not have silked?	must I not have been silking? must you not have been silking? must he not have been silking? must we not have been silking? must you not have been silking? must they not have been silking?