English verb conjugation
MUST CHURN

Regular verb: churn - churned - churned

Affirmation

Simple form	V-ing form
I must churn you must churn he must churn we must churn you must churn they must churn	I must be churning you must be churning he must be churning we must be churning you must be churning they must be churning
Perfect	V-ing perfect
I must have churned you must have churned he must have churned we must have churned you must have churned they must have churned	I must have been churning you must have been churning he must have been churning we must have been churning you must have been churning they must have been churning

Negation

Simple form	V-ing form
I mustn't churn you mustn't churn he mustn't churn we mustn't churn you mustn't churn they mustn't churn	I mustn't be churning you mustn't be churning he mustn't be churning we mustn't be churning you mustn't be churning they mustn't be churning
Perfect	V-ing perfect
I mustn't have churned you mustn't have churned he mustn't have churned we mustn't have churned you mustn't have churned they mustn't have churned	I mustn't have been churning you mustn't have been churning he mustn't have been churning we mustn't have been churning you mustn't have been churning they mustn't have been churning

Interrogative form

Simple form	V-ing form
must I churn? must you churn? must he churn? must we churn? must you churn? must they churn?	must I be churning? must you be churning? must he be churning? must we be churning? must you be churning? must they be churning?
Perfect	V-ing perfect
must I have churned? must you have churned? must he have churned? must we have churned? must you have churned? must they have churned?	must I have been churning? must you have been churning? must he have been churning? must we have been churning? must you have been churning? must they have been churning?

Interro-negative form

Simple form	V-ing form
mustn't I churn? mustn't you churn? mustn't he churn? mustn't we churn? mustn't you churn? mustn't they churn?	mustn't I be churning? mustn't you be churning? mustn't he be churning? mustn't we be churning? mustn't you be churning? mustn't they be churning?
Perfect	V-ing perfect
mustn't I have churned? mustn't you have churned? mustn't he have churned? mustn't we have churned? mustn't you have churned? mustn't they have churned?	mustn't I have been churning? mustn't you have been churning? mustn't he have been churning? mustn't we have been churning? mustn't you have been churning? mustn't they have been churning?