I must pour you must pour she must pour we must pour you must pour they must pour
V-ing form
I must be pouring you must be pouring she must be pouring we must be pouring you must be pouring they must be pouring
Perfect
I must have poured you must have poured she 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 she 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 she 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 she 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 she 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 she 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 she pour? must we pour? must you pour? must they pour?
V-ing form
must I be pouring? must you be pouring? must she be pouring? must we be pouring? must you be pouring? must they be pouring?
Perfect
must I have poured? must you have poured? must she 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 she 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 she 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 she 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 she 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 she have been pouring? mustn't we have been pouring? mustn't you have been pouring? mustn't they have been pouring?