English verb conjugation
MUST GRATIFY

Regular verb: gratify - gratified - gratified

Affirmation

Simple form	V-ing form
I must gratify you must gratify he must gratify we must gratify you must gratify they must gratify	I must be gratifying you must be gratifying he must be gratifying we must be gratifying you must be gratifying they must be gratifying
Perfect	V-ing perfect
I must have gratified you must have gratified he must have gratified we must have gratified you must have gratified they must have gratified	I must have been gratifying you must have been gratifying he must have been gratifying we must have been gratifying you must have been gratifying they must have been gratifying

Negation

Simple form	V-ing form
I mustn't gratify you mustn't gratify he mustn't gratify we mustn't gratify you mustn't gratify they mustn't gratify	I mustn't be gratifying you mustn't be gratifying he mustn't be gratifying we mustn't be gratifying you mustn't be gratifying they mustn't be gratifying
Perfect	V-ing perfect
I mustn't have gratified you mustn't have gratified he mustn't have gratified we mustn't have gratified you mustn't have gratified they mustn't have gratified	I mustn't have been gratifying you mustn't have been gratifying he mustn't have been gratifying we mustn't have been gratifying you mustn't have been gratifying they mustn't have been gratifying

Interrogative form

Simple form	V-ing form
must I gratify? must you gratify? must he gratify? must we gratify? must you gratify? must they gratify?	must I be gratifying? must you be gratifying? must he be gratifying? must we be gratifying? must you be gratifying? must they be gratifying?
Perfect	V-ing perfect
must I have gratified? must you have gratified? must he have gratified? must we have gratified? must you have gratified? must they have gratified?	must I have been gratifying? must you have been gratifying? must he have been gratifying? must we have been gratifying? must you have been gratifying? must they have been gratifying?

Interro-negative form

Simple form	V-ing form
mustn't I gratify? mustn't you gratify? mustn't he gratify? mustn't we gratify? mustn't you gratify? mustn't they gratify?	mustn't I be gratifying? mustn't you be gratifying? mustn't he be gratifying? mustn't we be gratifying? mustn't you be gratifying? mustn't they be gratifying?
Perfect	V-ing perfect
mustn't I have gratified? mustn't you have gratified? mustn't he have gratified? mustn't we have gratified? mustn't you have gratified? mustn't they have gratified?	mustn't I have been gratifying? mustn't you have been gratifying? mustn't he have been gratifying? mustn't we have been gratifying? mustn't you have been gratifying? mustn't they have been gratifying?