I must underemphasize you must underemphasize she must underemphasize we must underemphasize you must underemphasize they must underemphasize
V-ing form
I must be underemphasizing you must be underemphasizing she must be underemphasizing we must be underemphasizing you must be underemphasizing they must be underemphasizing
Perfect
I must have underemphasized you must have underemphasized she must have underemphasized we must have underemphasized you must have underemphasized they must have underemphasized
V-ing perfect
I must have been underemphasizing you must have been underemphasizing she must have been underemphasizing we must have been underemphasizing you must have been underemphasizing they must have been underemphasizing
Negation
Simple form
I mustn't underemphasize you mustn't underemphasize she mustn't underemphasize we mustn't underemphasize you mustn't underemphasize they mustn't underemphasize
V-ing form
I mustn't be underemphasizing you mustn't be underemphasizing she mustn't be underemphasizing we mustn't be underemphasizing you mustn't be underemphasizing they mustn't be underemphasizing
Perfect
I mustn't have underemphasized you mustn't have underemphasized she mustn't have underemphasized we mustn't have underemphasized you mustn't have underemphasized they mustn't have underemphasized
V-ing perfect
I mustn't have been underemphasizing you mustn't have been underemphasizing she mustn't have been underemphasizing we mustn't have been underemphasizing you mustn't have been underemphasizing they mustn't have been underemphasizing
Interrogative form
Simple form
must I underemphasize? must you underemphasize? must she underemphasize? must we underemphasize? must you underemphasize? must they underemphasize?
V-ing form
must I be underemphasizing? must you be underemphasizing? must she be underemphasizing? must we be underemphasizing? must you be underemphasizing? must they be underemphasizing?
Perfect
must I have underemphasized? must you have underemphasized? must she have underemphasized? must we have underemphasized? must you have underemphasized? must they have underemphasized?
V-ing perfect
must I have been underemphasizing? must you have been underemphasizing? must she have been underemphasizing? must we have been underemphasizing? must you have been underemphasizing? must they have been underemphasizing?
Interro-negative form
Simple form
mustn't I underemphasize? mustn't you underemphasize? mustn't she underemphasize? mustn't we underemphasize? mustn't you underemphasize? mustn't they underemphasize?
V-ing form
mustn't I be underemphasizing? mustn't you be underemphasizing? mustn't she be underemphasizing? mustn't we be underemphasizing? mustn't you be underemphasizing? mustn't they be underemphasizing?
Perfect
mustn't I have underemphasized? mustn't you have underemphasized? mustn't she have underemphasized? mustn't we have underemphasized? mustn't you have underemphasized? mustn't they have underemphasized?
V-ing perfect
mustn't I have been underemphasizing? mustn't you have been underemphasizing? mustn't she have been underemphasizing? mustn't we have been underemphasizing? mustn't you have been underemphasizing? mustn't they have been underemphasizing?