must sin
Verbo regolare: sin - sinned- sinned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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	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	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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	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	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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? 	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?