must nod
Verbo regular: nod - nodded- nodded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must nod
you must nod
he must nod
we must nod
you must nod
they must nod 	I must be nodding
you must be nodding
he must be nodding
we must be nodding
you must be nodding
they must be nodding	I must have nodded
you must have nodded
he must have nodded
we must have nodded
you must have nodded
they must have nodded	I must have been nodding
you must have been nodding
he must have been nodding
we must have been nodding
you must have been nodding
they must have been nodding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't nod
you mustn't nod
he mustn't nod
we mustn't nod
you mustn't nod
they mustn't nod 	I mustn't be nodding
you mustn't be nodding
he mustn't be nodding
we mustn't be nodding
you mustn't be nodding
they mustn't be nodding	I mustn't have nodded
you mustn't have nodded
he mustn't have nodded
we mustn't have nodded
you mustn't have nodded
they mustn't have nodded	I mustn't have been nodding
you mustn't have been nodding
he mustn't have been nodding
we mustn't have been nodding
you mustn't have been nodding
they mustn't have been nodding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I nod?
must you nod?
must he nod?
must we nod?
must you nod?
must they nod? 	must I be nodding?
must you be nodding?
must he be nodding?
must we be nodding?
must you be nodding?
must they be nodding? 	must I have nodded?
must you have nodded?
must he have nodded?
must we have nodded?
must you have nodded?
must they have nodded? 	must I have been nodding?
must you have been nodding?
must he have been nodding?
must we have been nodding?
must you have been nodding?
must they have been nodding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I nod?
mustn't you nod?
mustn't he nod?
mustn't we nod?
mustn't you nod?
mustn't they nod? 	mustn't I be nodding?
mustn't you be nodding?
mustn't he be nodding?
mustn't we be nodding?
mustn't you be nodding?
mustn't they be nodding? 	mustn't I have nodded?
mustn't you have nodded?
mustn't he have nodded?
mustn't we have nodded?
mustn't you have nodded?
mustn't they have nodded? 	mustn't I have been nodding?
mustn't you have been nodding?
mustn't he have been nodding?
mustn't we have been nodding?
mustn't you have been nodding?
mustn't they have been nodding?