Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must contain contain you must contain contain she must contain contain we must contain contain you must contain contain they must contain contain
V-ing form
I must be contain containing you must be contain containing she must be contain containing we must be contain containing you must be contain containing they must be contain containing
Perfect
I must have contain contained you must have contain contained she must have contain contained we must have contain contained you must have contain contained they must have contain contained
V-ing perfect
I must have been contain containing you must have been contain containing she must have been contain containing we must have been contain containing you must have been contain containing they must have been contain containing
Negation
Simple form
I mustn't contain contain you mustn't contain contain she mustn't contain contain we mustn't contain contain you mustn't contain contain they mustn't contain contain
V-ing form
I mustn't be contain containing you mustn't be contain containing she mustn't be contain containing we mustn't be contain containing you mustn't be contain containing they mustn't be contain containing
Perfect
I mustn't have contain contained you mustn't have contain contained she mustn't have contain contained we mustn't have contain contained you mustn't have contain contained they mustn't have contain contained
V-ing perfect
I mustn't have been contain containing you mustn't have been contain containing she mustn't have been contain containing we mustn't have been contain containing you mustn't have been contain containing they mustn't have been contain containing
Interrogative form
Simple form
must I contain contain? must you contain contain? must she contain contain? must we contain contain? must you contain contain? must they contain contain?
V-ing form
must I be contain containing? must you be contain containing? must she be contain containing? must we be contain containing? must you be contain containing? must they be contain containing?
Perfect
must I have contain contained? must you have contain contained? must she have contain contained? must we have contain contained? must you have contain contained? must they have contain contained?
V-ing perfect
must I have been contain containing? must you have been contain containing? must she have been contain containing? must we have been contain containing? must you have been contain containing? must they have been contain containing?
Interro-negative form
Simple form
mustn't I contain contain? mustn't you contain contain? mustn't she contain contain? mustn't we contain contain? mustn't you contain contain? mustn't they contain contain?
V-ing form
mustn't I be contain containing? mustn't you be contain containing? mustn't she be contain containing? mustn't we be contain containing? mustn't you be contain containing? mustn't they be contain containing?
Perfect
mustn't I have contain contained? mustn't you have contain contained? mustn't she have contain contained? mustn't we have contain contained? mustn't you have contain contained? mustn't they have contain contained?
V-ing perfect
mustn't I have been contain containing? mustn't you have been contain containing? mustn't she have been contain containing? mustn't we have been contain containing? mustn't you have been contain containing? mustn't they have been contain containing?