must double-tongue
Verbo regular: double-tongue - double-tongued- double-tongued

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must double-tongue
you must double-tongue
he must double-tongue
we must double-tongue
you must double-tongue
they must double-tongue 	I must be double-tonguing
you must be double-tonguing
he must be double-tonguing
we must be double-tonguing
you must be double-tonguing
they must be double-tonguing	I must have double-tongued
you must have double-tongued
he must have double-tongued
we must have double-tongued
you must have double-tongued
they must have double-tongued	I must have been double-tonguing
you must have been double-tonguing
he must have been double-tonguing
we must have been double-tonguing
you must have been double-tonguing
they must have been double-tonguing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not double-tongue
you must not double-tongue
he must not double-tongue
we must not double-tongue
you must not double-tongue
they must not double-tongue 	I must not be double-tonguing
you must not be double-tonguing
he must not be double-tonguing
we must not be double-tonguing
you must not be double-tonguing
they must not be double-tonguing	I must not have double-tongued
you must not have double-tongued
he must not have double-tongued
we must not have double-tongued
you must not have double-tongued
they must not have double-tongued	I must not have been double-tonguing
you must not have been double-tonguing
he must not have been double-tonguing
we must not have been double-tonguing
you must not have been double-tonguing
they must not have been double-tonguing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I double-tongue?
must you double-tongue?
must he double-tongue?
must we double-tongue?
must you double-tongue?
must they double-tongue? 	must I be double-tonguing?
must you be double-tonguing?
must he be double-tonguing?
must we be double-tonguing?
must you be double-tonguing?
must they be double-tonguing? 	must I have double-tongued?
must you have double-tongued?
must he have double-tongued?
must we have double-tongued?
must you have double-tongued?
must they have double-tongued? 	must I have been double-tonguing?
must you have been double-tonguing?
must he have been double-tonguing?
must we have been double-tonguing?
must you have been double-tonguing?
must they have been double-tonguing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not double-tongue?
must you not double-tongue?
must he not double-tongue?
must we not double-tongue?
must you not double-tongue?
must they not double-tongue? 	must I not be double-tonguing?
must you not be double-tonguing?
must he not be double-tonguing?
must we not be double-tonguing?
must you not be double-tonguing?
must they not be double-tonguing? 	must I not have double-tongued?
must you not have double-tongued?
must he not have double-tongued?
must we not have double-tongued?
must you not have double-tongued?
must they not have double-tongued? 	must I not have been double-tonguing?
must you not have been double-tonguing?
must he not have been double-tonguing?
must we not have been double-tonguing?
must you not have been double-tonguing?
must they not have been double-tonguing?