must seat
Verbo regular: seat - seated- seated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must seat
you must seat
he must seat
we must seat
you must seat
they must seat 	I must be seating
you must be seating
he must be seating
we must be seating
you must be seating
they must be seating	I must have seated
you must have seated
he must have seated
we must have seated
you must have seated
they must have seated	I must have been seating
you must have been seating
he must have been seating
we must have been seating
you must have been seating
they must have been seating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't seat
you mustn't seat
he mustn't seat
we mustn't seat
you mustn't seat
they mustn't seat 	I mustn't be seating
you mustn't be seating
he mustn't be seating
we mustn't be seating
you mustn't be seating
they mustn't be seating	I mustn't have seated
you mustn't have seated
he mustn't have seated
we mustn't have seated
you mustn't have seated
they mustn't have seated	I mustn't have been seating
you mustn't have been seating
he mustn't have been seating
we mustn't have been seating
you mustn't have been seating
they mustn't have been seating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I seat?
must you seat?
must he seat?
must we seat?
must you seat?
must they seat? 	must I be seating?
must you be seating?
must he be seating?
must we be seating?
must you be seating?
must they be seating? 	must I have seated?
must you have seated?
must he have seated?
must we have seated?
must you have seated?
must they have seated? 	must I have been seating?
must you have been seating?
must he have been seating?
must we have been seating?
must you have been seating?
must they have been seating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I seat?
mustn't you seat?
mustn't he seat?
mustn't we seat?
mustn't you seat?
mustn't they seat? 	mustn't I be seating?
mustn't you be seating?
mustn't he be seating?
mustn't we be seating?
mustn't you be seating?
mustn't they be seating? 	mustn't I have seated?
mustn't you have seated?
mustn't he have seated?
mustn't we have seated?
mustn't you have seated?
mustn't they have seated? 	mustn't I have been seating?
mustn't you have been seating?
mustn't he have been seating?
mustn't we have been seating?
mustn't you have been seating?
mustn't they have been seating?