English verb conjugation
MUST CARE

Regular verb: care - cared - cared

Affirmation

Simple form	V-ing form
I must care you must care he must care we must care you must care they must care	I must be caring you must be caring he must be caring we must be caring you must be caring they must be caring
Perfect	V-ing perfect
I must have cared you must have cared he must have cared we must have cared you must have cared they must have cared	I must have been caring you must have been caring he must have been caring we must have been caring you must have been caring they must have been caring

Negation

Simple form	V-ing form
I must not care you must not care he must not care we must not care you must not care they must not care	I must not be caring you must not be caring he must not be caring we must not be caring you must not be caring they must not be caring
Perfect	V-ing perfect
I must not have cared you must not have cared he must not have cared we must not have cared you must not have cared they must not have cared	I must not have been caring you must not have been caring he must not have been caring we must not have been caring you must not have been caring they must not have been caring

Interrogative form

Simple form	V-ing form
must I care? must you care? must he care? must we care? must you care? must they care?	must I be caring? must you be caring? must he be caring? must we be caring? must you be caring? must they be caring?
Perfect	V-ing perfect
must I have cared? must you have cared? must he have cared? must we have cared? must you have cared? must they have cared?	must I have been caring? must you have been caring? must he have been caring? must we have been caring? must you have been caring? must they have been caring?

Interro-negative form

Simple form	V-ing form
must I not care? must you not care? must he not care? must we not care? must you not care? must they not care?	must I not be caring? must you not be caring? must he not be caring? must we not be caring? must you not be caring? must they not be caring?
Perfect	V-ing perfect
must I not have cared? must you not have cared? must he not have cared? must we not have cared? must you not have cared? must they not have cared?	must I not have been caring? must you not have been caring? must he not have been caring? must we not have been caring? must you not have been caring? must they not have been caring?