must callous
Verbo regular: callous - calloused- calloused

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must callous
you must callous
he must callous
we must callous
you must callous
they must callous 	I must be callousing
you must be callousing
he must be callousing
we must be callousing
you must be callousing
they must be callousing	I must have calloused
you must have calloused
he must have calloused
we must have calloused
you must have calloused
they must have calloused	I must have been callousing
you must have been callousing
he must have been callousing
we must have been callousing
you must have been callousing
they must have been callousing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't callous
you mustn't callous
he mustn't callous
we mustn't callous
you mustn't callous
they mustn't callous 	I mustn't be callousing
you mustn't be callousing
he mustn't be callousing
we mustn't be callousing
you mustn't be callousing
they mustn't be callousing	I mustn't have calloused
you mustn't have calloused
he mustn't have calloused
we mustn't have calloused
you mustn't have calloused
they mustn't have calloused	I mustn't have been callousing
you mustn't have been callousing
he mustn't have been callousing
we mustn't have been callousing
you mustn't have been callousing
they mustn't have been callousing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I callous?
must you callous?
must he callous?
must we callous?
must you callous?
must they callous? 	must I be callousing?
must you be callousing?
must he be callousing?
must we be callousing?
must you be callousing?
must they be callousing? 	must I have calloused?
must you have calloused?
must he have calloused?
must we have calloused?
must you have calloused?
must they have calloused? 	must I have been callousing?
must you have been callousing?
must he have been callousing?
must we have been callousing?
must you have been callousing?
must they have been callousing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I callous?
mustn't you callous?
mustn't he callous?
mustn't we callous?
mustn't you callous?
mustn't they callous? 	mustn't I be callousing?
mustn't you be callousing?
mustn't he be callousing?
mustn't we be callousing?
mustn't you be callousing?
mustn't they be callousing? 	mustn't I have calloused?
mustn't you have calloused?
mustn't he have calloused?
mustn't we have calloused?
mustn't you have calloused?
mustn't they have calloused? 	mustn't I have been callousing?
mustn't you have been callousing?
mustn't he have been callousing?
mustn't we have been callousing?
mustn't you have been callousing?
mustn't they have been callousing?