English verb conjugation
MUST VACUUM

Regular verb: vacuum - vacuumed - vacuumed

Affirmation

Simple form	V-ing form
I must vacuum you must vacuum she must vacuum we must vacuum you must vacuum they must vacuum	I must be vacuuming you must be vacuuming she must be vacuuming we must be vacuuming you must be vacuuming they must be vacuuming
Perfect	V-ing perfect
I must have vacuumed you must have vacuumed she must have vacuumed we must have vacuumed you must have vacuumed they must have vacuumed	I must have been vacuuming you must have been vacuuming she must have been vacuuming we must have been vacuuming you must have been vacuuming they must have been vacuuming

Negation

Simple form	V-ing form
I must not vacuum you must not vacuum she must not vacuum we must not vacuum you must not vacuum they must not vacuum	I must not be vacuuming you must not be vacuuming she must not be vacuuming we must not be vacuuming you must not be vacuuming they must not be vacuuming
Perfect	V-ing perfect
I must not have vacuumed you must not have vacuumed she must not have vacuumed we must not have vacuumed you must not have vacuumed they must not have vacuumed	I must not have been vacuuming you must not have been vacuuming she must not have been vacuuming we must not have been vacuuming you must not have been vacuuming they must not have been vacuuming

Interrogative form

Simple form	V-ing form
must I vacuum? must you vacuum? must she vacuum? must we vacuum? must you vacuum? must they vacuum?	must I be vacuuming? must you be vacuuming? must she be vacuuming? must we be vacuuming? must you be vacuuming? must they be vacuuming?
Perfect	V-ing perfect
must I have vacuumed? must you have vacuumed? must she have vacuumed? must we have vacuumed? must you have vacuumed? must they have vacuumed?	must I have been vacuuming? must you have been vacuuming? must she have been vacuuming? must we have been vacuuming? must you have been vacuuming? must they have been vacuuming?

Interro-negative form

Simple form	V-ing form
must I not vacuum? must you not vacuum? must she not vacuum? must we not vacuum? must you not vacuum? must they not vacuum?	must I not be vacuuming? must you not be vacuuming? must she not be vacuuming? must we not be vacuuming? must you not be vacuuming? must they not be vacuuming?
Perfect	V-ing perfect
must I not have vacuumed? must you not have vacuumed? must she not have vacuumed? must we not have vacuumed? must you not have vacuumed? must they not have vacuumed?	must I not have been vacuuming? must you not have been vacuuming? must she not have been vacuuming? must we not have been vacuuming? must you not have been vacuuming? must they not have been vacuuming?