must sough
Verbo regular: sough - soughed- soughed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must sough
you must sough
she must sough
we must sough
you must sough
they must sough 	I must be soughing
you must be soughing
she must be soughing
we must be soughing
you must be soughing
they must be soughing	I must have soughed
you must have soughed
she must have soughed
we must have soughed
you must have soughed
they must have soughed	I must have been soughing
you must have been soughing
she must have been soughing
we must have been soughing
you must have been soughing
they must have been soughing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't sough
you mustn't sough
she mustn't sough
we mustn't sough
you mustn't sough
they mustn't sough 	I mustn't be soughing
you mustn't be soughing
she mustn't be soughing
we mustn't be soughing
you mustn't be soughing
they mustn't be soughing	I mustn't have soughed
you mustn't have soughed
she mustn't have soughed
we mustn't have soughed
you mustn't have soughed
they mustn't have soughed	I mustn't have been soughing
you mustn't have been soughing
she mustn't have been soughing
we mustn't have been soughing
you mustn't have been soughing
they mustn't have been soughing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I sough?
must you sough?
must she sough?
must we sough?
must you sough?
must they sough? 	must I be soughing?
must you be soughing?
must she be soughing?
must we be soughing?
must you be soughing?
must they be soughing? 	must I have soughed?
must you have soughed?
must she have soughed?
must we have soughed?
must you have soughed?
must they have soughed? 	must I have been soughing?
must you have been soughing?
must she have been soughing?
must we have been soughing?
must you have been soughing?
must they have been soughing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I sough?
mustn't you sough?
mustn't she sough?
mustn't we sough?
mustn't you sough?
mustn't they sough? 	mustn't I be soughing?
mustn't you be soughing?
mustn't she be soughing?
mustn't we be soughing?
mustn't you be soughing?
mustn't they be soughing? 	mustn't I have soughed?
mustn't you have soughed?
mustn't she have soughed?
mustn't we have soughed?
mustn't you have soughed?
mustn't they have soughed? 	mustn't I have been soughing?
mustn't you have been soughing?
mustn't she have been soughing?
mustn't we have been soughing?
mustn't you have been soughing?
mustn't they have been soughing?