English verb conjugation
MUST DOWNSHIFT

Regular verb: downshift - downshifted - downshifted

Affirmation

Simple form	V-ing form
I must downshift you must downshift she must downshift we must downshift you must downshift they must downshift	I must be downshifting you must be downshifting she must be downshifting we must be downshifting you must be downshifting they must be downshifting
Perfect	V-ing perfect
I must have downshifted you must have downshifted she must have downshifted we must have downshifted you must have downshifted they must have downshifted	I must have been downshifting you must have been downshifting she must have been downshifting we must have been downshifting you must have been downshifting they must have been downshifting

Negation

Simple form	V-ing form
I must not downshift you must not downshift she must not downshift we must not downshift you must not downshift they must not downshift	I must not be downshifting you must not be downshifting she must not be downshifting we must not be downshifting you must not be downshifting they must not be downshifting
Perfect	V-ing perfect
I must not have downshifted you must not have downshifted she must not have downshifted we must not have downshifted you must not have downshifted they must not have downshifted	I must not have been downshifting you must not have been downshifting she must not have been downshifting we must not have been downshifting you must not have been downshifting they must not have been downshifting

Interrogative form

Simple form	V-ing form
must I downshift? must you downshift? must she downshift? must we downshift? must you downshift? must they downshift?	must I be downshifting? must you be downshifting? must she be downshifting? must we be downshifting? must you be downshifting? must they be downshifting?
Perfect	V-ing perfect
must I have downshifted? must you have downshifted? must she have downshifted? must we have downshifted? must you have downshifted? must they have downshifted?	must I have been downshifting? must you have been downshifting? must she have been downshifting? must we have been downshifting? must you have been downshifting? must they have been downshifting?

Interro-negative form

Simple form	V-ing form
must I not downshift? must you not downshift? must she not downshift? must we not downshift? must you not downshift? must they not downshift?	must I not be downshifting? must you not be downshifting? must she not be downshifting? must we not be downshifting? must you not be downshifting? must they not be downshifting?
Perfect	V-ing perfect
must I not have downshifted? must you not have downshifted? must she not have downshifted? must we not have downshifted? must you not have downshifted? must they not have downshifted?	must I not have been downshifting? must you not have been downshifting? must she not have been downshifting? must we not have been downshifting? must you not have been downshifting? must they not have been downshifting?