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 must not prettify you must not prettify he must not prettify we must not prettify you must not prettify they must not prettify	I must not be prettifying you must not be prettifying he must not be prettifying we must not be prettifying you must not be prettifying they must not be prettifying
Perfect	V-ing perfect
I must not have prettified you must not have prettified he must not have prettified we must not have prettified you must not have prettified they must not have prettified	I must not have been prettifying you must not have been prettifying he must not have been prettifying we must not have been prettifying you must not have been prettifying they must not 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
must I not prettify? must you not prettify? must he not prettify? must we not prettify? must you not prettify? must they not prettify?	must I not be prettifying? must you not be prettifying? must he not be prettifying? must we not be prettifying? must you not be prettifying? must they not be prettifying?
Perfect	V-ing perfect
must I not have prettified? must you not have prettified? must he not have prettified? must we not have prettified? must you not have prettified? must they not have prettified?	must I not have been prettifying? must you not have been prettifying? must he not have been prettifying? must we not have been prettifying? must you not have been prettifying? must they not have been prettifying?