English verb conjugation
MUST PRETTIFY

Regular verb: prettify - prettified - prettified

Affirmation

Simple form	V-ing form
I must prettify you must prettify he must prettify we must prettify you must prettify they must prettify	I must be prettifying you must be prettifying he must be prettifying we must be prettifying you must be prettifying they must be prettifying
Perfect	V-ing perfect
I must have prettified you must have prettified he must have prettified we must have prettified you must have prettified they must have prettified	I must have been prettifying you must have been prettifying he must have been prettifying we must have been prettifying you must have been prettifying they must have been prettifying

Negation

Simple form	V-ing form
I mustn't prettify you mustn't prettify he mustn't prettify we mustn't prettify you mustn't prettify they mustn't prettify	I mustn't be prettifying you mustn't be prettifying he mustn't be prettifying we mustn't be prettifying you mustn't be prettifying they mustn't be prettifying
Perfect	V-ing perfect
I mustn't have prettified you mustn't have prettified he mustn't have prettified we mustn't have prettified you mustn't have prettified they mustn't have prettified	I mustn't have been prettifying you mustn't have been prettifying he mustn't have been prettifying we mustn't have been prettifying you mustn't have been prettifying they mustn't have been prettifying

Interrogative form

Simple form	V-ing form
must I prettify? must you prettify? must he prettify? must we prettify? must you prettify? must they prettify?	must I be prettifying? must you be prettifying? must he be prettifying? must we be prettifying? must you be prettifying? must they be prettifying?
Perfect	V-ing perfect
must I have prettified? must you have prettified? must he have prettified? must we have prettified? must you have prettified? must they have prettified?	must I have been prettifying? must you have been prettifying? must he have been prettifying? must we have been prettifying? must you have been prettifying? must they have been prettifying?

Interro-negative form

Simple form	V-ing form
mustn't I prettify? mustn't you prettify? mustn't he prettify? mustn't we prettify? mustn't you prettify? mustn't they prettify?	mustn't I be prettifying? mustn't you be prettifying? mustn't he be prettifying? mustn't we be prettifying? mustn't you be prettifying? mustn't they be prettifying?
Perfect	V-ing perfect
mustn't I have prettified? mustn't you have prettified? mustn't he have prettified? mustn't we have prettified? mustn't you have prettified? mustn't they have prettified?	mustn't I have been prettifying? mustn't you have been prettifying? mustn't he have been prettifying? mustn't we have been prettifying? mustn't you have been prettifying? mustn't they have been prettifying?