English verb conjugation
MUST SHACKLE

Regular verb: shackle - shackled - shackled

Affirmation

Simple form	V-ing form
I must shackle you must shackle he must shackle we must shackle you must shackle they must shackle	I must be shackling you must be shackling he must be shackling we must be shackling you must be shackling they must be shackling
Perfect	V-ing perfect
I must have shackled you must have shackled he must have shackled we must have shackled you must have shackled they must have shackled	I must have been shackling you must have been shackling he must have been shackling we must have been shackling you must have been shackling they must have been shackling

Negation

Simple form	V-ing form
I must not shackle you must not shackle he must not shackle we must not shackle you must not shackle they must not shackle	I must not be shackling you must not be shackling he must not be shackling we must not be shackling you must not be shackling they must not be shackling
Perfect	V-ing perfect
I must not have shackled you must not have shackled he must not have shackled we must not have shackled you must not have shackled they must not have shackled	I must not have been shackling you must not have been shackling he must not have been shackling we must not have been shackling you must not have been shackling they must not have been shackling

Interrogative form

Simple form	V-ing form
must I shackle? must you shackle? must he shackle? must we shackle? must you shackle? must they shackle?	must I be shackling? must you be shackling? must he be shackling? must we be shackling? must you be shackling? must they be shackling?
Perfect	V-ing perfect
must I have shackled? must you have shackled? must he have shackled? must we have shackled? must you have shackled? must they have shackled?	must I have been shackling? must you have been shackling? must he have been shackling? must we have been shackling? must you have been shackling? must they have been shackling?

Interro-negative form

Simple form	V-ing form
must I not shackle? must you not shackle? must he not shackle? must we not shackle? must you not shackle? must they not shackle?	must I not be shackling? must you not be shackling? must he not be shackling? must we not be shackling? must you not be shackling? must they not be shackling?
Perfect	V-ing perfect
must I not have shackled? must you not have shackled? must he not have shackled? must we not have shackled? must you not have shackled? must they not have shackled?	must I not have been shackling? must you not have been shackling? must he not have been shackling? must we not have been shackling? must you not have been shackling? must they not have been shackling?