must interchange
Verbo regular: interchange - interchanged- interchanged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must interchange
you must interchange
he must interchange
we must interchange
you must interchange
they must interchange 	I must be interchanging
you must be interchanging
he must be interchanging
we must be interchanging
you must be interchanging
they must be interchanging	I must have interchanged
you must have interchanged
he must have interchanged
we must have interchanged
you must have interchanged
they must have interchanged	I must have been interchanging
you must have been interchanging
he must have been interchanging
we must have been interchanging
you must have been interchanging
they must have been interchanging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't interchange
you mustn't interchange
he mustn't interchange
we mustn't interchange
you mustn't interchange
they mustn't interchange 	I mustn't be interchanging
you mustn't be interchanging
he mustn't be interchanging
we mustn't be interchanging
you mustn't be interchanging
they mustn't be interchanging	I mustn't have interchanged
you mustn't have interchanged
he mustn't have interchanged
we mustn't have interchanged
you mustn't have interchanged
they mustn't have interchanged	I mustn't have been interchanging
you mustn't have been interchanging
he mustn't have been interchanging
we mustn't have been interchanging
you mustn't have been interchanging
they mustn't have been interchanging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I interchange?
must you interchange?
must he interchange?
must we interchange?
must you interchange?
must they interchange? 	must I be interchanging?
must you be interchanging?
must he be interchanging?
must we be interchanging?
must you be interchanging?
must they be interchanging? 	must I have interchanged?
must you have interchanged?
must he have interchanged?
must we have interchanged?
must you have interchanged?
must they have interchanged? 	must I have been interchanging?
must you have been interchanging?
must he have been interchanging?
must we have been interchanging?
must you have been interchanging?
must they have been interchanging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I interchange?
mustn't you interchange?
mustn't he interchange?
mustn't we interchange?
mustn't you interchange?
mustn't they interchange? 	mustn't I be interchanging?
mustn't you be interchanging?
mustn't he be interchanging?
mustn't we be interchanging?
mustn't you be interchanging?
mustn't they be interchanging? 	mustn't I have interchanged?
mustn't you have interchanged?
mustn't he have interchanged?
mustn't we have interchanged?
mustn't you have interchanged?
mustn't they have interchanged? 	mustn't I have been interchanging?
mustn't you have been interchanging?
mustn't he have been interchanging?
mustn't we have been interchanging?
mustn't you have been interchanging?
mustn't they have been interchanging?