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 mustn't shackle you mustn't shackle he mustn't shackle we mustn't shackle you mustn't shackle they mustn't shackle	I mustn't be shackling you mustn't be shackling he mustn't be shackling we mustn't be shackling you mustn't be shackling they mustn't be shackling
Perfect	V-ing perfect
I mustn't have shackled you mustn't have shackled he mustn't have shackled we mustn't have shackled you mustn't have shackled they mustn't have shackled	I mustn't have been shackling you mustn't have been shackling he mustn't have been shackling we mustn't have been shackling you mustn't have been shackling they mustn't 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
mustn't I shackle? mustn't you shackle? mustn't he shackle? mustn't we shackle? mustn't you shackle? mustn't they shackle?	mustn't I be shackling? mustn't you be shackling? mustn't he be shackling? mustn't we be shackling? mustn't you be shackling? mustn't they be shackling?
Perfect	V-ing perfect
mustn't I have shackled? mustn't you have shackled? mustn't he have shackled? mustn't we have shackled? mustn't you have shackled? mustn't they have shackled?	mustn't I have been shackling? mustn't you have been shackling? mustn't he have been shackling? mustn't we have been shackling? mustn't you have been shackling? mustn't they have been shackling?