English verb conjugation
MUST COFFIN

Regular verb: coffin - coffined - coffined

Affirmation

Simple form	V-ing form
I must coffin you must coffin he must coffin we must coffin you must coffin they must coffin	I must be coffining you must be coffining he must be coffining we must be coffining you must be coffining they must be coffining
Perfect	V-ing perfect
I must have coffined you must have coffined he must have coffined we must have coffined you must have coffined they must have coffined	I must have been coffining you must have been coffining he must have been coffining we must have been coffining you must have been coffining they must have been coffining

Negation

Simple form	V-ing form
I must not coffin you must not coffin he must not coffin we must not coffin you must not coffin they must not coffin	I must not be coffining you must not be coffining he must not be coffining we must not be coffining you must not be coffining they must not be coffining
Perfect	V-ing perfect
I must not have coffined you must not have coffined he must not have coffined we must not have coffined you must not have coffined they must not have coffined	I must not have been coffining you must not have been coffining he must not have been coffining we must not have been coffining you must not have been coffining they must not have been coffining

Interrogative form

Simple form	V-ing form
must I coffin? must you coffin? must he coffin? must we coffin? must you coffin? must they coffin?	must I be coffining? must you be coffining? must he be coffining? must we be coffining? must you be coffining? must they be coffining?
Perfect	V-ing perfect
must I have coffined? must you have coffined? must he have coffined? must we have coffined? must you have coffined? must they have coffined?	must I have been coffining? must you have been coffining? must he have been coffining? must we have been coffining? must you have been coffining? must they have been coffining?

Interro-negative form

Simple form	V-ing form
must I not coffin? must you not coffin? must he not coffin? must we not coffin? must you not coffin? must they not coffin?	must I not be coffining? must you not be coffining? must he not be coffining? must we not be coffining? must you not be coffining? must they not be coffining?
Perfect	V-ing perfect
must I not have coffined? must you not have coffined? must he not have coffined? must we not have coffined? must you not have coffined? must they not have coffined?	must I not have been coffining? must you not have been coffining? must he not have been coffining? must we not have been coffining? must you not have been coffining? must they not have been coffining?