must detrain
Verbo regular: detrain - detrained- detrained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must detrain
you must detrain
he must detrain
we must detrain
you must detrain
they must detrain 	I must be detraining
you must be detraining
he must be detraining
we must be detraining
you must be detraining
they must be detraining	I must have detrained
you must have detrained
he must have detrained
we must have detrained
you must have detrained
they must have detrained	I must have been detraining
you must have been detraining
he must have been detraining
we must have been detraining
you must have been detraining
they must have been detraining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not detrain
you must not detrain
he must not detrain
we must not detrain
you must not detrain
they must not detrain 	I must not be detraining
you must not be detraining
he must not be detraining
we must not be detraining
you must not be detraining
they must not be detraining	I must not have detrained
you must not have detrained
he must not have detrained
we must not have detrained
you must not have detrained
they must not have detrained	I must not have been detraining
you must not have been detraining
he must not have been detraining
we must not have been detraining
you must not have been detraining
they must not have been detraining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I detrain?
must you detrain?
must he detrain?
must we detrain?
must you detrain?
must they detrain? 	must I be detraining?
must you be detraining?
must he be detraining?
must we be detraining?
must you be detraining?
must they be detraining? 	must I have detrained?
must you have detrained?
must he have detrained?
must we have detrained?
must you have detrained?
must they have detrained? 	must I have been detraining?
must you have been detraining?
must he have been detraining?
must we have been detraining?
must you have been detraining?
must they have been detraining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not detrain?
must you not detrain?
must he not detrain?
must we not detrain?
must you not detrain?
must they not detrain? 	must I not be detraining?
must you not be detraining?
must he not be detraining?
must we not be detraining?
must you not be detraining?
must they not be detraining? 	must I not have detrained?
must you not have detrained?
must he not have detrained?
must we not have detrained?
must you not have detrained?
must they not have detrained? 	must I not have been detraining?
must you not have been detraining?
must he not have been detraining?
must we not have been detraining?
must you not have been detraining?
must they not have been detraining?