I must cure you must cure she must cure we must cure you must cure they must cure
V-ing form
I must be curing you must be curing she must be curing we must be curing you must be curing they must be curing
Perfect
I must have cured you must have cured she must have cured we must have cured you must have cured they must have cured
V-ing perfect
I must have been curing you must have been curing she must have been curing we must have been curing you must have been curing they must have been curing
Negation
Simple form
I mustn't cure you mustn't cure she mustn't cure we mustn't cure you mustn't cure they mustn't cure
V-ing form
I mustn't be curing you mustn't be curing she mustn't be curing we mustn't be curing you mustn't be curing they mustn't be curing
Perfect
I mustn't have cured you mustn't have cured she mustn't have cured we mustn't have cured you mustn't have cured they mustn't have cured
V-ing perfect
I mustn't have been curing you mustn't have been curing she mustn't have been curing we mustn't have been curing you mustn't have been curing they mustn't have been curing
Interrogative form
Simple form
must I cure? must you cure? must she cure? must we cure? must you cure? must they cure?
V-ing form
must I be curing? must you be curing? must she be curing? must we be curing? must you be curing? must they be curing?
Perfect
must I have cured? must you have cured? must she have cured? must we have cured? must you have cured? must they have cured?
V-ing perfect
must I have been curing? must you have been curing? must she have been curing? must we have been curing? must you have been curing? must they have been curing?
Interro-negative form
Simple form
mustn't I cure? mustn't you cure? mustn't she cure? mustn't we cure? mustn't you cure? mustn't they cure?
V-ing form
mustn't I be curing? mustn't you be curing? mustn't she be curing? mustn't we be curing? mustn't you be curing? mustn't they be curing?
Perfect
mustn't I have cured? mustn't you have cured? mustn't she have cured? mustn't we have cured? mustn't you have cured? mustn't they have cured?
V-ing perfect
mustn't I have been curing? mustn't you have been curing? mustn't she have been curing? mustn't we have been curing? mustn't you have been curing? mustn't they have been curing?