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