English verb conjugation
MUST DOWNSHIFT

Regular verb: downshift - downshifted - downshifted

Affirmation

Simple form	V-ing form
I must downshift you must downshift he must downshift we must downshift you must downshift they must downshift	I must be downshifting you must be downshifting he 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 he 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 he 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 mustn't downshift you mustn't downshift he mustn't downshift we mustn't downshift you mustn't downshift they mustn't downshift	I mustn't be downshifting you mustn't be downshifting he mustn't be downshifting we mustn't be downshifting you mustn't be downshifting they mustn't be downshifting
Perfect	V-ing perfect
I mustn't have downshifted you mustn't have downshifted he mustn't have downshifted we mustn't have downshifted you mustn't have downshifted they mustn't have downshifted	I mustn't have been downshifting you mustn't have been downshifting he mustn't have been downshifting we mustn't have been downshifting you mustn't have been downshifting they mustn't have been downshifting

Interrogative form

Simple form	V-ing form
must I downshift? must you downshift? must he downshift? must we downshift? must you downshift? must they downshift?	must I be downshifting? must you be downshifting? must he 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 he 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 he 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
mustn't I downshift? mustn't you downshift? mustn't he downshift? mustn't we downshift? mustn't you downshift? mustn't they downshift?	mustn't I be downshifting? mustn't you be downshifting? mustn't he be downshifting? mustn't we be downshifting? mustn't you be downshifting? mustn't they be downshifting?
Perfect	V-ing perfect
mustn't I have downshifted? mustn't you have downshifted? mustn't he have downshifted? mustn't we have downshifted? mustn't you have downshifted? mustn't they have downshifted?	mustn't I have been downshifting? mustn't you have been downshifting? mustn't he have been downshifting? mustn't we have been downshifting? mustn't you have been downshifting? mustn't they have been downshifting?