must sour
Verbo regolare: sour - soured- soured

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must sour
you must sour
he must sour
we must sour
you must sour
they must sour 	I must be souring
you must be souring
he must be souring
we must be souring
you must be souring
they must be souring	I must have soured
you must have soured
he must have soured
we must have soured
you must have soured
they must have soured	I must have been souring
you must have been souring
he must have been souring
we must have been souring
you must have been souring
they must have been souring	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not sour
you must not sour
he must not sour
we must not sour
you must not sour
they must not sour 	I must not be souring
you must not be souring
he must not be souring
we must not be souring
you must not be souring
they must not be souring	I must not have soured
you must not have soured
he must not have soured
we must not have soured
you must not have soured
they must not have soured	I must not have been souring
you must not have been souring
he must not have been souring
we must not have been souring
you must not have been souring
they must not have been souring	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I sour?
must you sour?
must he sour?
must we sour?
must you sour?
must they sour? 	must I be souring?
must you be souring?
must he be souring?
must we be souring?
must you be souring?
must they be souring? 	must I have soured?
must you have soured?
must he have soured?
must we have soured?
must you have soured?
must they have soured? 	must I have been souring?
must you have been souring?
must he have been souring?
must we have been souring?
must you have been souring?
must they have been souring? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not sour?
must you not sour?
must he not sour?
must we not sour?
must you not sour?
must they not sour? 	must I not be souring?
must you not be souring?
must he not be souring?
must we not be souring?
must you not be souring?
must they not be souring? 	must I not have soured?
must you not have soured?
must he not have soured?
must we not have soured?
must you not have soured?
must they not have soured? 	must I not have been souring?
must you not have been souring?
must he not have been souring?
must we not have been souring?
must you not have been souring?
must they not have been souring?