must stretch
Verbo regular: stretch - stretched- stretched

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must stretch
you must stretch
he must stretch
we must stretch
you must stretch
they must stretch 	I must be stretching
you must be stretching
he must be stretching
we must be stretching
you must be stretching
they must be stretching	I must have stretched
you must have stretched
he must have stretched
we must have stretched
you must have stretched
they must have stretched	I must have been stretching
you must have been stretching
he must have been stretching
we must have been stretching
you must have been stretching
they must have been stretching	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't stretch
you mustn't stretch
he mustn't stretch
we mustn't stretch
you mustn't stretch
they mustn't stretch 	I mustn't be stretching
you mustn't be stretching
he mustn't be stretching
we mustn't be stretching
you mustn't be stretching
they mustn't be stretching	I mustn't have stretched
you mustn't have stretched
he mustn't have stretched
we mustn't have stretched
you mustn't have stretched
they mustn't have stretched	I mustn't have been stretching
you mustn't have been stretching
he mustn't have been stretching
we mustn't have been stretching
you mustn't have been stretching
they mustn't have been stretching	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I stretch?
must you stretch?
must he stretch?
must we stretch?
must you stretch?
must they stretch? 	must I be stretching?
must you be stretching?
must he be stretching?
must we be stretching?
must you be stretching?
must they be stretching? 	must I have stretched?
must you have stretched?
must he have stretched?
must we have stretched?
must you have stretched?
must they have stretched? 	must I have been stretching?
must you have been stretching?
must he have been stretching?
must we have been stretching?
must you have been stretching?
must they have been stretching? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I stretch?
mustn't you stretch?
mustn't he stretch?
mustn't we stretch?
mustn't you stretch?
mustn't they stretch? 	mustn't I be stretching?
mustn't you be stretching?
mustn't he be stretching?
mustn't we be stretching?
mustn't you be stretching?
mustn't they be stretching? 	mustn't I have stretched?
mustn't you have stretched?
mustn't he have stretched?
mustn't we have stretched?
mustn't you have stretched?
mustn't they have stretched? 	mustn't I have been stretching?
mustn't you have been stretching?
mustn't he have been stretching?
mustn't we have been stretching?
mustn't you have been stretching?
mustn't they have been stretching?