must build
Verbo irregolare: build - built- built

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must build
you must build
he must build
we must build
you must build
they must build 	I must be building
you must be building
he must be building
we must be building
you must be building
they must be building	I must have built
you must have built
he must have built
we must have built
you must have built
they must have built	I must have been building
you must have been building
he must have been building
we must have been building
you must have been building
they must have been building	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't build
you mustn't build
he mustn't build
we mustn't build
you mustn't build
they mustn't build 	I mustn't be building
you mustn't be building
he mustn't be building
we mustn't be building
you mustn't be building
they mustn't be building	I mustn't have built
you mustn't have built
he mustn't have built
we mustn't have built
you mustn't have built
they mustn't have built	I mustn't have been building
you mustn't have been building
he mustn't have been building
we mustn't have been building
you mustn't have been building
they mustn't have been building	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I build?
must you build?
must he build?
must we build?
must you build?
must they build? 	must I be building?
must you be building?
must he be building?
must we be building?
must you be building?
must they be building? 	must I have built?
must you have built?
must he have built?
must we have built?
must you have built?
must they have built? 	must I have been building?
must you have been building?
must he have been building?
must we have been building?
must you have been building?
must they have been building? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I build?
mustn't you build?
mustn't he build?
mustn't we build?
mustn't you build?
mustn't they build? 	mustn't I be building?
mustn't you be building?
mustn't he be building?
mustn't we be building?
mustn't you be building?
mustn't they be building? 	mustn't I have built?
mustn't you have built?
mustn't he have built?
mustn't we have built?
mustn't you have built?
mustn't they have built? 	mustn't I have been building?
mustn't you have been building?
mustn't he have been building?
mustn't we have been building?
mustn't you have been building?
mustn't they have been building?