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 must not frank you must not frank he must not frank we must not frank you must not frank they must not frank	I must not be franking you must not be franking he must not be franking we must not be franking you must not be franking they must not be franking
Perfect	V-ing perfect
I must not have franked you must not have franked he must not have franked we must not have franked you must not have franked they must not have franked	I must not have been franking you must not have been franking he must not have been franking we must not have been franking you must not have been franking they must not 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
must I not frank? must you not frank? must he not frank? must we not frank? must you not frank? must they not frank?	must I not be franking? must you not be franking? must he not be franking? must we not be franking? must you not be franking? must they not be franking?
Perfect	V-ing perfect
must I not have franked? must you not have franked? must he not have franked? must we not have franked? must you not have franked? must they not have franked?	must I not have been franking? must you not have been franking? must he not have been franking? must we not have been franking? must you not have been franking? must they not have been franking?