I must caution you must caution he must caution we must caution you must caution they must caution
Forma com V-ing
I must be cautioning you must be cautioning he must be cautioning we must be cautioning you must be cautioning they must be cautioning
Perfeito
I must have cautioned you must have cautioned he must have cautioned we must have cautioned you must have cautioned they must have cautioned
Perfeito com V-ing
I must have been cautioning you must have been cautioning he must have been cautioning we must have been cautioning you must have been cautioning they must have been cautioning
Negação
Forma simple
I mustn't caution you mustn't caution he mustn't caution we mustn't caution you mustn't caution they mustn't caution
Forma com V-ing
I mustn't be cautioning you mustn't be cautioning he mustn't be cautioning we mustn't be cautioning you mustn't be cautioning they mustn't be cautioning
Perfeito
I mustn't have cautioned you mustn't have cautioned he mustn't have cautioned we mustn't have cautioned you mustn't have cautioned they mustn't have cautioned
Perfeito com V-ing
I mustn't have been cautioning you mustn't have been cautioning he mustn't have been cautioning we mustn't have been cautioning you mustn't have been cautioning they mustn't have been cautioning
Forma interrogativa
Forma simple
must I caution? must you caution? must he caution? must we caution? must you caution? must they caution?
Forma com V-ing
must I be cautioning? must you be cautioning? must he be cautioning? must we be cautioning? must you be cautioning? must they be cautioning?
Perfeito
must I have cautioned? must you have cautioned? must he have cautioned? must we have cautioned? must you have cautioned? must they have cautioned?
Perfeito com V-ing
must I have been cautioning? must you have been cautioning? must he have been cautioning? must we have been cautioning? must you have been cautioning? must they have been cautioning?
Forma interro-Negação
Forma simple
mustn't I caution? mustn't you caution? mustn't he caution? mustn't we caution? mustn't you caution? mustn't they caution?
Forma com V-ing
mustn't I be cautioning? mustn't you be cautioning? mustn't he be cautioning? mustn't we be cautioning? mustn't you be cautioning? mustn't they be cautioning?
Perfeito
mustn't I have cautioned? mustn't you have cautioned? mustn't he have cautioned? mustn't we have cautioned? mustn't you have cautioned? mustn't they have cautioned?
Perfeito com V-ing
mustn't I have been cautioning? mustn't you have been cautioning? mustn't he have been cautioning? mustn't we have been cautioning? mustn't you have been cautioning? mustn't they have been cautioning?