must orb
Verbo regular: orb - orbed- orbed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must orb
you must orb
he must orb
we must orb
you must orb
they must orb 	I must be orbing
you must be orbing
he must be orbing
we must be orbing
you must be orbing
they must be orbing	I must have orbed
you must have orbed
he must have orbed
we must have orbed
you must have orbed
they must have orbed	I must have been orbing
you must have been orbing
he must have been orbing
we must have been orbing
you must have been orbing
they must have been orbing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't orb
you mustn't orb
he mustn't orb
we mustn't orb
you mustn't orb
they mustn't orb 	I mustn't be orbing
you mustn't be orbing
he mustn't be orbing
we mustn't be orbing
you mustn't be orbing
they mustn't be orbing	I mustn't have orbed
you mustn't have orbed
he mustn't have orbed
we mustn't have orbed
you mustn't have orbed
they mustn't have orbed	I mustn't have been orbing
you mustn't have been orbing
he mustn't have been orbing
we mustn't have been orbing
you mustn't have been orbing
they mustn't have been orbing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I orb?
must you orb?
must he orb?
must we orb?
must you orb?
must they orb? 	must I be orbing?
must you be orbing?
must he be orbing?
must we be orbing?
must you be orbing?
must they be orbing? 	must I have orbed?
must you have orbed?
must he have orbed?
must we have orbed?
must you have orbed?
must they have orbed? 	must I have been orbing?
must you have been orbing?
must he have been orbing?
must we have been orbing?
must you have been orbing?
must they have been orbing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I orb?
mustn't you orb?
mustn't he orb?
mustn't we orb?
mustn't you orb?
mustn't they orb? 	mustn't I be orbing?
mustn't you be orbing?
mustn't he be orbing?
mustn't we be orbing?
mustn't you be orbing?
mustn't they be orbing? 	mustn't I have orbed?
mustn't you have orbed?
mustn't he have orbed?
mustn't we have orbed?
mustn't you have orbed?
mustn't they have orbed? 	mustn't I have been orbing?
mustn't you have been orbing?
mustn't he have been orbing?
mustn't we have been orbing?
mustn't you have been orbing?
mustn't they have been orbing?