must defog
Verbo regular: defog - defoged- defoged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must defog
you must defog
he must defog
we must defog
you must defog
they must defog 	I must be defoging
you must be defoging
he must be defoging
we must be defoging
you must be defoging
they must be defoging	I must have defoged
you must have defoged
he must have defoged
we must have defoged
you must have defoged
they must have defoged	I must have been defoging
you must have been defoging
he must have been defoging
we must have been defoging
you must have been defoging
they must have been defoging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't defog
you mustn't defog
he mustn't defog
we mustn't defog
you mustn't defog
they mustn't defog 	I mustn't be defoging
you mustn't be defoging
he mustn't be defoging
we mustn't be defoging
you mustn't be defoging
they mustn't be defoging	I mustn't have defoged
you mustn't have defoged
he mustn't have defoged
we mustn't have defoged
you mustn't have defoged
they mustn't have defoged	I mustn't have been defoging
you mustn't have been defoging
he mustn't have been defoging
we mustn't have been defoging
you mustn't have been defoging
they mustn't have been defoging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I defog?
must you defog?
must he defog?
must we defog?
must you defog?
must they defog? 	must I be defoging?
must you be defoging?
must he be defoging?
must we be defoging?
must you be defoging?
must they be defoging? 	must I have defoged?
must you have defoged?
must he have defoged?
must we have defoged?
must you have defoged?
must they have defoged? 	must I have been defoging?
must you have been defoging?
must he have been defoging?
must we have been defoging?
must you have been defoging?
must they have been defoging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I defog?
mustn't you defog?
mustn't he defog?
mustn't we defog?
mustn't you defog?
mustn't they defog? 	mustn't I be defoging?
mustn't you be defoging?
mustn't he be defoging?
mustn't we be defoging?
mustn't you be defoging?
mustn't they be defoging? 	mustn't I have defoged?
mustn't you have defoged?
mustn't he have defoged?
mustn't we have defoged?
mustn't you have defoged?
mustn't they have defoged? 	mustn't I have been defoging?
mustn't you have been defoging?
mustn't he have been defoging?
mustn't we have been defoging?
mustn't you have been defoging?
mustn't they have been defoging?