English verb conjugation
MUST ENGRAIN

Regular verb: engrain - engrained - engrained

Affirmation

Simple form	V-ing form
I must engrain you must engrain he must engrain we must engrain you must engrain they must engrain	I must be engraining you must be engraining he must be engraining we must be engraining you must be engraining they must be engraining
Perfect	V-ing perfect
I must have engrained you must have engrained he must have engrained we must have engrained you must have engrained they must have engrained	I must have been engraining you must have been engraining he must have been engraining we must have been engraining you must have been engraining they must have been engraining

Negation

Simple form	V-ing form
I must not engrain you must not engrain he must not engrain we must not engrain you must not engrain they must not engrain	I must not be engraining you must not be engraining he must not be engraining we must not be engraining you must not be engraining they must not be engraining
Perfect	V-ing perfect
I must not have engrained you must not have engrained he must not have engrained we must not have engrained you must not have engrained they must not have engrained	I must not have been engraining you must not have been engraining he must not have been engraining we must not have been engraining you must not have been engraining they must not have been engraining

Interrogative form

Simple form	V-ing form
must I engrain? must you engrain? must he engrain? must we engrain? must you engrain? must they engrain?	must I be engraining? must you be engraining? must he be engraining? must we be engraining? must you be engraining? must they be engraining?
Perfect	V-ing perfect
must I have engrained? must you have engrained? must he have engrained? must we have engrained? must you have engrained? must they have engrained?	must I have been engraining? must you have been engraining? must he have been engraining? must we have been engraining? must you have been engraining? must they have been engraining?

Interro-negative form

Simple form	V-ing form
must I not engrain? must you not engrain? must he not engrain? must we not engrain? must you not engrain? must they not engrain?	must I not be engraining? must you not be engraining? must he not be engraining? must we not be engraining? must you not be engraining? must they not be engraining?
Perfect	V-ing perfect
must I not have engrained? must you not have engrained? must he not have engrained? must we not have engrained? must you not have engrained? must they not have engrained?	must I not have been engraining? must you not have been engraining? must he not have been engraining? must we not have been engraining? must you not have been engraining? must they not have been engraining?