English verb conjugation
MUST MEMORIZE

Regular verb: memorize - memorized - memorized

Affirmation

Simple form	V-ing form
I must memorize you must memorize he must memorize we must memorize you must memorize they must memorize	I must be memorizing you must be memorizing he must be memorizing we must be memorizing you must be memorizing they must be memorizing
Perfect	V-ing perfect
I must have memorized you must have memorized he must have memorized we must have memorized you must have memorized they must have memorized	I must have been memorizing you must have been memorizing he must have been memorizing we must have been memorizing you must have been memorizing they must have been memorizing

Negation

Simple form	V-ing form
I mustn't memorize you mustn't memorize he mustn't memorize we mustn't memorize you mustn't memorize they mustn't memorize	I mustn't be memorizing you mustn't be memorizing he mustn't be memorizing we mustn't be memorizing you mustn't be memorizing they mustn't be memorizing
Perfect	V-ing perfect
I mustn't have memorized you mustn't have memorized he mustn't have memorized we mustn't have memorized you mustn't have memorized they mustn't have memorized	I mustn't have been memorizing you mustn't have been memorizing he mustn't have been memorizing we mustn't have been memorizing you mustn't have been memorizing they mustn't have been memorizing

Interrogative form

Simple form	V-ing form
must I memorize? must you memorize? must he memorize? must we memorize? must you memorize? must they memorize?	must I be memorizing? must you be memorizing? must he be memorizing? must we be memorizing? must you be memorizing? must they be memorizing?
Perfect	V-ing perfect
must I have memorized? must you have memorized? must he have memorized? must we have memorized? must you have memorized? must they have memorized?	must I have been memorizing? must you have been memorizing? must he have been memorizing? must we have been memorizing? must you have been memorizing? must they have been memorizing?

Interro-negative form

Simple form	V-ing form
mustn't I memorize? mustn't you memorize? mustn't he memorize? mustn't we memorize? mustn't you memorize? mustn't they memorize?	mustn't I be memorizing? mustn't you be memorizing? mustn't he be memorizing? mustn't we be memorizing? mustn't you be memorizing? mustn't they be memorizing?
Perfect	V-ing perfect
mustn't I have memorized? mustn't you have memorized? mustn't he have memorized? mustn't we have memorized? mustn't you have memorized? mustn't they have memorized?	mustn't I have been memorizing? mustn't you have been memorizing? mustn't he have been memorizing? mustn't we have been memorizing? mustn't you have been memorizing? mustn't they have been memorizing?