English verb conjugation
MUST FRANK

Regular verb: frank - franked - franked

Affirmation

Simple form	V-ing form
I must frank you must frank he must frank we must frank you must frank they must frank	I must be franking you must be franking he must be franking we must be franking you must be franking they must be franking
Perfect	V-ing perfect
I must have franked you must have franked he must have franked we must have franked you must have franked they must have franked	I must have been franking you must have been franking he must have been franking we must have been franking you must have been franking they must have been franking

Negation

Simple form	V-ing form
I mustn't frank you mustn't frank he mustn't frank we mustn't frank you mustn't frank they mustn't frank	I mustn't be franking you mustn't be franking he mustn't be franking we mustn't be franking you mustn't be franking they mustn't be franking
Perfect	V-ing perfect
I mustn't have franked you mustn't have franked he mustn't have franked we mustn't have franked you mustn't have franked they mustn't have franked	I mustn't have been franking you mustn't have been franking he mustn't have been franking we mustn't have been franking you mustn't have been franking they mustn't have been franking

Interrogative form

Simple form	V-ing form
must I frank? must you frank? must he frank? must we frank? must you frank? must they frank?	must I be franking? must you be franking? must he be franking? must we be franking? must you be franking? must they be franking?
Perfect	V-ing perfect
must I have franked? must you have franked? must he have franked? must we have franked? must you have franked? must they have franked?	must I have been franking? must you have been franking? must he have been franking? must we have been franking? must you have been franking? must they have been franking?

Interro-negative form

Simple form	V-ing form
mustn't I frank? mustn't you frank? mustn't he frank? mustn't we frank? mustn't you frank? mustn't they frank?	mustn't I be franking? mustn't you be franking? mustn't he be franking? mustn't we be franking? mustn't you be franking? mustn't they be franking?
Perfect	V-ing perfect
mustn't I have franked? mustn't you have franked? mustn't he have franked? mustn't we have franked? mustn't you have franked? mustn't they have franked?	mustn't I have been franking? mustn't you have been franking? mustn't he have been franking? mustn't we have been franking? mustn't you have been franking? mustn't they have been franking?