must dust
Verbo regolare: dust - dusted- dusted

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must dust
you must dust
she must dust
we must dust
you must dust
they must dust 	I must be dusting
you must be dusting
she must be dusting
we must be dusting
you must be dusting
they must be dusting	I must have dusted
you must have dusted
she must have dusted
we must have dusted
you must have dusted
they must have dusted	I must have been dusting
you must have been dusting
she must have been dusting
we must have been dusting
you must have been dusting
they must have been dusting	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not dust
you must not dust
she must not dust
we must not dust
you must not dust
they must not dust 	I must not be dusting
you must not be dusting
she must not be dusting
we must not be dusting
you must not be dusting
they must not be dusting	I must not have dusted
you must not have dusted
she must not have dusted
we must not have dusted
you must not have dusted
they must not have dusted	I must not have been dusting
you must not have been dusting
she must not have been dusting
we must not have been dusting
you must not have been dusting
they must not have been dusting	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I dust?
must you dust?
must she dust?
must we dust?
must you dust?
must they dust? 	must I be dusting?
must you be dusting?
must she be dusting?
must we be dusting?
must you be dusting?
must they be dusting? 	must I have dusted?
must you have dusted?
must she have dusted?
must we have dusted?
must you have dusted?
must they have dusted? 	must I have been dusting?
must you have been dusting?
must she have been dusting?
must we have been dusting?
must you have been dusting?
must they have been dusting? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not dust?
must you not dust?
must she not dust?
must we not dust?
must you not dust?
must they not dust? 	must I not be dusting?
must you not be dusting?
must she not be dusting?
must we not be dusting?
must you not be dusting?
must they not be dusting? 	must I not have dusted?
must you not have dusted?
must she not have dusted?
must we not have dusted?
must you not have dusted?
must they not have dusted? 	must I not have been dusting?
must you not have been dusting?
must she not have been dusting?
must we not have been dusting?
must you not have been dusting?
must they not have been dusting?