must dull
Verbo regolare: dull - dulled- dulled

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must dull
you must dull
he must dull
we must dull
you must dull
they must dull 	I must be dulling
you must be dulling
he must be dulling
we must be dulling
you must be dulling
they must be dulling	I must have dulled
you must have dulled
he must have dulled
we must have dulled
you must have dulled
they must have dulled	I must have been dulling
you must have been dulling
he must have been dulling
we must have been dulling
you must have been dulling
they must have been dulling	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not dull
you must not dull
he must not dull
we must not dull
you must not dull
they must not dull 	I must not be dulling
you must not be dulling
he must not be dulling
we must not be dulling
you must not be dulling
they must not be dulling	I must not have dulled
you must not have dulled
he must not have dulled
we must not have dulled
you must not have dulled
they must not have dulled	I must not have been dulling
you must not have been dulling
he must not have been dulling
we must not have been dulling
you must not have been dulling
they must not have been dulling	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I dull?
must you dull?
must he dull?
must we dull?
must you dull?
must they dull? 	must I be dulling?
must you be dulling?
must he be dulling?
must we be dulling?
must you be dulling?
must they be dulling? 	must I have dulled?
must you have dulled?
must he have dulled?
must we have dulled?
must you have dulled?
must they have dulled? 	must I have been dulling?
must you have been dulling?
must he have been dulling?
must we have been dulling?
must you have been dulling?
must they have been dulling? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not dull?
must you not dull?
must he not dull?
must we not dull?
must you not dull?
must they not dull? 	must I not be dulling?
must you not be dulling?
must he not be dulling?
must we not be dulling?
must you not be dulling?
must they not be dulling? 	must I not have dulled?
must you not have dulled?
must he not have dulled?
must we not have dulled?
must you not have dulled?
must they not have dulled? 	must I not have been dulling?
must you not have been dulling?
must he not have been dulling?
must we not have been dulling?
must you not have been dulling?
must they not have been dulling?