English verb conjugation
MUST COFFIN

Regular verb: coffin - coffined - coffined

Affirmation

Simple form	V-ing form
I must coffin you must coffin she must coffin we must coffin you must coffin they must coffin	I must be coffining you must be coffining she 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 she 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 she 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 mustn't coffin you mustn't coffin she mustn't coffin we mustn't coffin you mustn't coffin they mustn't coffin	I mustn't be coffining you mustn't be coffining she mustn't be coffining we mustn't be coffining you mustn't be coffining they mustn't be coffining
Perfect	V-ing perfect
I mustn't have coffined you mustn't have coffined she mustn't have coffined we mustn't have coffined you mustn't have coffined they mustn't have coffined	I mustn't have been coffining you mustn't have been coffining she mustn't have been coffining we mustn't have been coffining you mustn't have been coffining they mustn't have been coffining

Interrogative form

Simple form	V-ing form
must I coffin? must you coffin? must she coffin? must we coffin? must you coffin? must they coffin?	must I be coffining? must you be coffining? must she 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 she 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 she 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
mustn't I coffin? mustn't you coffin? mustn't she coffin? mustn't we coffin? mustn't you coffin? mustn't they coffin?	mustn't I be coffining? mustn't you be coffining? mustn't she be coffining? mustn't we be coffining? mustn't you be coffining? mustn't they be coffining?
Perfect	V-ing perfect
mustn't I have coffined? mustn't you have coffined? mustn't she have coffined? mustn't we have coffined? mustn't you have coffined? mustn't they have coffined?	mustn't I have been coffining? mustn't you have been coffining? mustn't she have been coffining? mustn't we have been coffining? mustn't you have been coffining? mustn't they have been coffining?