English verb conjugation
MUST WHIZ

Regular verb: whiz - whized - whized

Affirmation

Simple form	V-ing form
I must whiz you must whiz he must whiz we must whiz you must whiz they must whiz	I must be whizing you must be whizing he must be whizing we must be whizing you must be whizing they must be whizing
Perfect	V-ing perfect
I must have whized you must have whized he must have whized we must have whized you must have whized they must have whized	I must have been whizing you must have been whizing he must have been whizing we must have been whizing you must have been whizing they must have been whizing

Negation

Simple form	V-ing form
I mustn't whiz you mustn't whiz he mustn't whiz we mustn't whiz you mustn't whiz they mustn't whiz	I mustn't be whizing you mustn't be whizing he mustn't be whizing we mustn't be whizing you mustn't be whizing they mustn't be whizing
Perfect	V-ing perfect
I mustn't have whized you mustn't have whized he mustn't have whized we mustn't have whized you mustn't have whized they mustn't have whized	I mustn't have been whizing you mustn't have been whizing he mustn't have been whizing we mustn't have been whizing you mustn't have been whizing they mustn't have been whizing

Interrogative form

Simple form	V-ing form
must I whiz? must you whiz? must he whiz? must we whiz? must you whiz? must they whiz?	must I be whizing? must you be whizing? must he be whizing? must we be whizing? must you be whizing? must they be whizing?
Perfect	V-ing perfect
must I have whized? must you have whized? must he have whized? must we have whized? must you have whized? must they have whized?	must I have been whizing? must you have been whizing? must he have been whizing? must we have been whizing? must you have been whizing? must they have been whizing?

Interro-negative form

Simple form	V-ing form
mustn't I whiz? mustn't you whiz? mustn't he whiz? mustn't we whiz? mustn't you whiz? mustn't they whiz?	mustn't I be whizing? mustn't you be whizing? mustn't he be whizing? mustn't we be whizing? mustn't you be whizing? mustn't they be whizing?
Perfect	V-ing perfect
mustn't I have whized? mustn't you have whized? mustn't he have whized? mustn't we have whized? mustn't you have whized? mustn't they have whized?	mustn't I have been whizing? mustn't you have been whizing? mustn't he have been whizing? mustn't we have been whizing? mustn't you have been whizing? mustn't they have been whizing?