must service
Verbo regolare: service - serviced- serviced

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must service
you must service
he must service
we must service
you must service
they must service 	I must be servicing
you must be servicing
he must be servicing
we must be servicing
you must be servicing
they must be servicing	I must have serviced
you must have serviced
he must have serviced
we must have serviced
you must have serviced
they must have serviced	I must have been servicing
you must have been servicing
he must have been servicing
we must have been servicing
you must have been servicing
they must have been servicing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not service
you must not service
he must not service
we must not service
you must not service
they must not service 	I must not be servicing
you must not be servicing
he must not be servicing
we must not be servicing
you must not be servicing
they must not be servicing	I must not have serviced
you must not have serviced
he must not have serviced
we must not have serviced
you must not have serviced
they must not have serviced	I must not have been servicing
you must not have been servicing
he must not have been servicing
we must not have been servicing
you must not have been servicing
they must not have been servicing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I service?
must you service?
must he service?
must we service?
must you service?
must they service? 	must I be servicing?
must you be servicing?
must he be servicing?
must we be servicing?
must you be servicing?
must they be servicing? 	must I have serviced?
must you have serviced?
must he have serviced?
must we have serviced?
must you have serviced?
must they have serviced? 	must I have been servicing?
must you have been servicing?
must he have been servicing?
must we have been servicing?
must you have been servicing?
must they have been servicing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not service?
must you not service?
must he not service?
must we not service?
must you not service?
must they not service? 	must I not be servicing?
must you not be servicing?
must he not be servicing?
must we not be servicing?
must you not be servicing?
must they not be servicing? 	must I not have serviced?
must you not have serviced?
must he not have serviced?
must we not have serviced?
must you not have serviced?
must they not have serviced? 	must I not have been servicing?
must you not have been servicing?
must he not have been servicing?
must we not have been servicing?
must you not have been servicing?
must they not have been servicing?