English verb conjugation
MUST POISON

Regular verb: poison - poisoned - poisoned

Affirmation

Simple form	V-ing form
I must poison you must poison he must poison we must poison you must poison they must poison	I must be poisoning you must be poisoning he must be poisoning we must be poisoning you must be poisoning they must be poisoning
Perfect	V-ing perfect
I must have poisoned you must have poisoned he must have poisoned we must have poisoned you must have poisoned they must have poisoned	I must have been poisoning you must have been poisoning he must have been poisoning we must have been poisoning you must have been poisoning they must have been poisoning

Negation

Simple form	V-ing form
I mustn't poison you mustn't poison he mustn't poison we mustn't poison you mustn't poison they mustn't poison	I mustn't be poisoning you mustn't be poisoning he mustn't be poisoning we mustn't be poisoning you mustn't be poisoning they mustn't be poisoning
Perfect	V-ing perfect
I mustn't have poisoned you mustn't have poisoned he mustn't have poisoned we mustn't have poisoned you mustn't have poisoned they mustn't have poisoned	I mustn't have been poisoning you mustn't have been poisoning he mustn't have been poisoning we mustn't have been poisoning you mustn't have been poisoning they mustn't have been poisoning

Interrogative form

Simple form	V-ing form
must I poison? must you poison? must he poison? must we poison? must you poison? must they poison?	must I be poisoning? must you be poisoning? must he be poisoning? must we be poisoning? must you be poisoning? must they be poisoning?
Perfect	V-ing perfect
must I have poisoned? must you have poisoned? must he have poisoned? must we have poisoned? must you have poisoned? must they have poisoned?	must I have been poisoning? must you have been poisoning? must he have been poisoning? must we have been poisoning? must you have been poisoning? must they have been poisoning?

Interro-negative form

Simple form	V-ing form
mustn't I poison? mustn't you poison? mustn't he poison? mustn't we poison? mustn't you poison? mustn't they poison?	mustn't I be poisoning? mustn't you be poisoning? mustn't he be poisoning? mustn't we be poisoning? mustn't you be poisoning? mustn't they be poisoning?
Perfect	V-ing perfect
mustn't I have poisoned? mustn't you have poisoned? mustn't he have poisoned? mustn't we have poisoned? mustn't you have poisoned? mustn't they have poisoned?	mustn't I have been poisoning? mustn't you have been poisoning? mustn't he have been poisoning? mustn't we have been poisoning? mustn't you have been poisoning? mustn't they have been poisoning?