I must pour you must pour he must pour we must pour you must pour they must pour
V-ing form
I must be pouring you must be pouring he must be pouring we must be pouring you must be pouring they must be pouring
Perfect
I must have poured you must have poured he must have poured we must have poured you must have poured they must have poured
V-ing perfect
I must have been pouring you must have been pouring he must have been pouring we must have been pouring you must have been pouring they must have been pouring
Negation
Simple form
I mustn't pour you mustn't pour he mustn't pour we mustn't pour you mustn't pour they mustn't pour
V-ing form
I mustn't be pouring you mustn't be pouring he mustn't be pouring we mustn't be pouring you mustn't be pouring they mustn't be pouring
Perfect
I mustn't have poured you mustn't have poured he mustn't have poured we mustn't have poured you mustn't have poured they mustn't have poured
V-ing perfect
I mustn't have been pouring you mustn't have been pouring he mustn't have been pouring we mustn't have been pouring you mustn't have been pouring they mustn't have been pouring
Interrogative form
Simple form
must I pour? must you pour? must he pour? must we pour? must you pour? must they pour?
V-ing form
must I be pouring? must you be pouring? must he be pouring? must we be pouring? must you be pouring? must they be pouring?
Perfect
must I have poured? must you have poured? must he have poured? must we have poured? must you have poured? must they have poured?
V-ing perfect
must I have been pouring? must you have been pouring? must he have been pouring? must we have been pouring? must you have been pouring? must they have been pouring?
Interro-negative form
Simple form
mustn't I pour? mustn't you pour? mustn't he pour? mustn't we pour? mustn't you pour? mustn't they pour?
V-ing form
mustn't I be pouring? mustn't you be pouring? mustn't he be pouring? mustn't we be pouring? mustn't you be pouring? mustn't they be pouring?
Perfect
mustn't I have poured? mustn't you have poured? mustn't he have poured? mustn't we have poured? mustn't you have poured? mustn't they have poured?
V-ing perfect
mustn't I have been pouring? mustn't you have been pouring? mustn't he have been pouring? mustn't we have been pouring? mustn't you have been pouring? mustn't they have been pouring?