must bur
Verbo regolare: bur - bured- bured

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must bur
you must bur
she must bur
we must bur
you must bur
they must bur 	I must be buring
you must be buring
she must be buring
we must be buring
you must be buring
they must be buring	I must have bured
you must have bured
she must have bured
we must have bured
you must have bured
they must have bured	I must have been buring
you must have been buring
she must have been buring
we must have been buring
you must have been buring
they must have been buring	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not bur
you must not bur
she must not bur
we must not bur
you must not bur
they must not bur 	I must not be buring
you must not be buring
she must not be buring
we must not be buring
you must not be buring
they must not be buring	I must not have bured
you must not have bured
she must not have bured
we must not have bured
you must not have bured
they must not have bured	I must not have been buring
you must not have been buring
she must not have been buring
we must not have been buring
you must not have been buring
they must not have been buring	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I bur?
must you bur?
must she bur?
must we bur?
must you bur?
must they bur? 	must I be buring?
must you be buring?
must she be buring?
must we be buring?
must you be buring?
must they be buring? 	must I have bured?
must you have bured?
must she have bured?
must we have bured?
must you have bured?
must they have bured? 	must I have been buring?
must you have been buring?
must she have been buring?
must we have been buring?
must you have been buring?
must they have been buring? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not bur?
must you not bur?
must she not bur?
must we not bur?
must you not bur?
must they not bur? 	must I not be buring?
must you not be buring?
must she not be buring?
must we not be buring?
must you not be buring?
must they not be buring? 	must I not have bured?
must you not have bured?
must she not have bured?
must we not have bured?
must you not have bured?
must they not have bured? 	must I not have been buring?
must you not have been buring?
must she not have been buring?
must we not have been buring?
must you not have been buring?
must they not have been buring?