must prealter
Verbo regolare: prealter - prealtered- prealtered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must prealter
you must prealter
she must prealter
we must prealter
you must prealter
they must prealter 	I must be prealtering
you must be prealtering
she must be prealtering
we must be prealtering
you must be prealtering
they must be prealtering	I must have prealtered
you must have prealtered
she must have prealtered
we must have prealtered
you must have prealtered
they must have prealtered	I must have been prealtering
you must have been prealtering
she must have been prealtering
we must have been prealtering
you must have been prealtering
they must have been prealtering	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not prealter
you must not prealter
she must not prealter
we must not prealter
you must not prealter
they must not prealter 	I must not be prealtering
you must not be prealtering
she must not be prealtering
we must not be prealtering
you must not be prealtering
they must not be prealtering	I must not have prealtered
you must not have prealtered
she must not have prealtered
we must not have prealtered
you must not have prealtered
they must not have prealtered	I must not have been prealtering
you must not have been prealtering
she must not have been prealtering
we must not have been prealtering
you must not have been prealtering
they must not have been prealtering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I prealter?
must you prealter?
must she prealter?
must we prealter?
must you prealter?
must they prealter? 	must I be prealtering?
must you be prealtering?
must she be prealtering?
must we be prealtering?
must you be prealtering?
must they be prealtering? 	must I have prealtered?
must you have prealtered?
must she have prealtered?
must we have prealtered?
must you have prealtered?
must they have prealtered? 	must I have been prealtering?
must you have been prealtering?
must she have been prealtering?
must we have been prealtering?
must you have been prealtering?
must they have been prealtering? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not prealter?
must you not prealter?
must she not prealter?
must we not prealter?
must you not prealter?
must they not prealter? 	must I not be prealtering?
must you not be prealtering?
must she not be prealtering?
must we not be prealtering?
must you not be prealtering?
must they not be prealtering? 	must I not have prealtered?
must you not have prealtered?
must she not have prealtered?
must we not have prealtered?
must you not have prealtered?
must they not have prealtered? 	must I not have been prealtering?
must you not have been prealtering?
must she not have been prealtering?
must we not have been prealtering?
must you not have been prealtering?
must they not have been prealtering?