must den
Verbo regular: den - dened- dened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must den
you must den
he must den
we must den
you must den
they must den 	I must be dening
you must be dening
he must be dening
we must be dening
you must be dening
they must be dening	I must have dened
you must have dened
he must have dened
we must have dened
you must have dened
they must have dened	I must have been dening
you must have been dening
he must have been dening
we must have been dening
you must have been dening
they must have been dening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't den
you mustn't den
he mustn't den
we mustn't den
you mustn't den
they mustn't den 	I mustn't be dening
you mustn't be dening
he mustn't be dening
we mustn't be dening
you mustn't be dening
they mustn't be dening	I mustn't have dened
you mustn't have dened
he mustn't have dened
we mustn't have dened
you mustn't have dened
they mustn't have dened	I mustn't have been dening
you mustn't have been dening
he mustn't have been dening
we mustn't have been dening
you mustn't have been dening
they mustn't have been dening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I den?
must you den?
must he den?
must we den?
must you den?
must they den? 	must I be dening?
must you be dening?
must he be dening?
must we be dening?
must you be dening?
must they be dening? 	must I have dened?
must you have dened?
must he have dened?
must we have dened?
must you have dened?
must they have dened? 	must I have been dening?
must you have been dening?
must he have been dening?
must we have been dening?
must you have been dening?
must they have been dening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I den?
mustn't you den?
mustn't he den?
mustn't we den?
mustn't you den?
mustn't they den? 	mustn't I be dening?
mustn't you be dening?
mustn't he be dening?
mustn't we be dening?
mustn't you be dening?
mustn't they be dening? 	mustn't I have dened?
mustn't you have dened?
mustn't he have dened?
mustn't we have dened?
mustn't you have dened?
mustn't they have dened? 	mustn't I have been dening?
mustn't you have been dening?
mustn't he have been dening?
mustn't we have been dening?
mustn't you have been dening?
mustn't they have been dening?