must prefix
Verbo regolare: prefix - prefixed- prefixed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must prefix
you must prefix
she must prefix
we must prefix
you must prefix
they must prefix 	I must be prefixing
you must be prefixing
she must be prefixing
we must be prefixing
you must be prefixing
they must be prefixing	I must have prefixed
you must have prefixed
she must have prefixed
we must have prefixed
you must have prefixed
they must have prefixed	I must have been prefixing
you must have been prefixing
she must have been prefixing
we must have been prefixing
you must have been prefixing
they must have been prefixing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not prefix
you must not prefix
she must not prefix
we must not prefix
you must not prefix
they must not prefix 	I must not be prefixing
you must not be prefixing
she must not be prefixing
we must not be prefixing
you must not be prefixing
they must not be prefixing	I must not have prefixed
you must not have prefixed
she must not have prefixed
we must not have prefixed
you must not have prefixed
they must not have prefixed	I must not have been prefixing
you must not have been prefixing
she must not have been prefixing
we must not have been prefixing
you must not have been prefixing
they must not have been prefixing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I prefix?
must you prefix?
must she prefix?
must we prefix?
must you prefix?
must they prefix? 	must I be prefixing?
must you be prefixing?
must she be prefixing?
must we be prefixing?
must you be prefixing?
must they be prefixing? 	must I have prefixed?
must you have prefixed?
must she have prefixed?
must we have prefixed?
must you have prefixed?
must they have prefixed? 	must I have been prefixing?
must you have been prefixing?
must she have been prefixing?
must we have been prefixing?
must you have been prefixing?
must they have been prefixing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not prefix?
must you not prefix?
must she not prefix?
must we not prefix?
must you not prefix?
must they not prefix? 	must I not be prefixing?
must you not be prefixing?
must she not be prefixing?
must we not be prefixing?
must you not be prefixing?
must they not be prefixing? 	must I not have prefixed?
must you not have prefixed?
must she not have prefixed?
must we not have prefixed?
must you not have prefixed?
must they not have prefixed? 	must I not have been prefixing?
must you not have been prefixing?
must she not have been prefixing?
must we not have been prefixing?
must you not have been prefixing?
must they not have been prefixing?