English verb conjugation
MUST OPERATE

Regular verb: operate - operated - operated

Affirmation

Simple form	V-ing form
I must operate you must operate she must operate we must operate you must operate they must operate	I must be operating you must be operating she must be operating we must be operating you must be operating they must be operating
Perfect	V-ing perfect
I must have operated you must have operated she must have operated we must have operated you must have operated they must have operated	I must have been operating you must have been operating she must have been operating we must have been operating you must have been operating they must have been operating

Negation

Simple form	V-ing form
I must not operate you must not operate she must not operate we must not operate you must not operate they must not operate	I must not be operating you must not be operating she must not be operating we must not be operating you must not be operating they must not be operating
Perfect	V-ing perfect
I must not have operated you must not have operated she must not have operated we must not have operated you must not have operated they must not have operated	I must not have been operating you must not have been operating she must not have been operating we must not have been operating you must not have been operating they must not have been operating

Interrogative form

Simple form	V-ing form
must I operate? must you operate? must she operate? must we operate? must you operate? must they operate?	must I be operating? must you be operating? must she be operating? must we be operating? must you be operating? must they be operating?
Perfect	V-ing perfect
must I have operated? must you have operated? must she have operated? must we have operated? must you have operated? must they have operated?	must I have been operating? must you have been operating? must she have been operating? must we have been operating? must you have been operating? must they have been operating?

Interro-negative form

Simple form	V-ing form
must I not operate? must you not operate? must she not operate? must we not operate? must you not operate? must they not operate?	must I not be operating? must you not be operating? must she not be operating? must we not be operating? must you not be operating? must they not be operating?
Perfect	V-ing perfect
must I not have operated? must you not have operated? must she not have operated? must we not have operated? must you not have operated? must they not have operated?	must I not have been operating? must you not have been operating? must she not have been operating? must we not have been operating? must you not have been operating? must they not have been operating?