English verb conjugation
MUST SIN

Regular verb: sin - sinned - sinned

Affirmation

Simple form	V-ing form
I must sin you must sin he must sin we must sin you must sin they must sin	I must be sinning you must be sinning he must be sinning we must be sinning you must be sinning they must be sinning
Perfect	V-ing perfect
I must have sinned you must have sinned he must have sinned we must have sinned you must have sinned they must have sinned	I must have been sinning you must have been sinning he must have been sinning we must have been sinning you must have been sinning they must have been sinning

Negation

Simple form	V-ing form
I must not sin you must not sin he must not sin we must not sin you must not sin they must not sin	I must not be sinning you must not be sinning he must not be sinning we must not be sinning you must not be sinning they must not be sinning
Perfect	V-ing perfect
I must not have sinned you must not have sinned he must not have sinned we must not have sinned you must not have sinned they must not have sinned	I must not have been sinning you must not have been sinning he must not have been sinning we must not have been sinning you must not have been sinning they must not have been sinning

Interrogative form

Simple form	V-ing form
must I sin? must you sin? must he sin? must we sin? must you sin? must they sin?	must I be sinning? must you be sinning? must he be sinning? must we be sinning? must you be sinning? must they be sinning?
Perfect	V-ing perfect
must I have sinned? must you have sinned? must he have sinned? must we have sinned? must you have sinned? must they have sinned?	must I have been sinning? must you have been sinning? must he have been sinning? must we have been sinning? must you have been sinning? must they have been sinning?

Interro-negative form

Simple form	V-ing form
must I not sin? must you not sin? must he not sin? must we not sin? must you not sin? must they not sin?	must I not be sinning? must you not be sinning? must he not be sinning? must we not be sinning? must you not be sinning? must they not be sinning?
Perfect	V-ing perfect
must I not have sinned? must you not have sinned? must he not have sinned? must we not have sinned? must you not have sinned? must they not have sinned?	must I not have been sinning? must you not have been sinning? must he not have been sinning? must we not have been sinning? must you not have been sinning? must they not have been sinning?