I must doubt you must doubt he must doubt we must doubt you must doubt they must doubt
Forma con V-ing
I must be doubting you must be doubting he must be doubting we must be doubting you must be doubting they must be doubting
Perfetto
I must have doubted you must have doubted he must have doubted we must have doubted you must have doubted they must have doubted
Perfetto con V-ing
I must have been doubting you must have been doubting he must have been doubting we must have been doubting you must have been doubting they must have been doubting
Negazione
Forma semplice
I must not doubt you must not doubt he must not doubt we must not doubt you must not doubt they must not doubt
Forma con V-ing
I must not be doubting you must not be doubting he must not be doubting we must not be doubting you must not be doubting they must not be doubting
Perfetto
I must not have doubted you must not have doubted he must not have doubted we must not have doubted you must not have doubted they must not have doubted
Perfetto con V-ing
I must not have been doubting you must not have been doubting he must not have been doubting we must not have been doubting you must not have been doubting they must not have been doubting
Forma interrogativa
Forma semplice
must I doubt? must you doubt? must he doubt? must we doubt? must you doubt? must they doubt?
Forma con V-ing
must I be doubting? must you be doubting? must he be doubting? must we be doubting? must you be doubting? must they be doubting?
Perfetto
must I have doubted? must you have doubted? must he have doubted? must we have doubted? must you have doubted? must they have doubted?
Perfetto con V-ing
must I have been doubting? must you have been doubting? must he have been doubting? must we have been doubting? must you have been doubting? must they have been doubting?
Forma interro-negativa
Forma semplice
must I not doubt? must you not doubt? must he not doubt? must we not doubt? must you not doubt? must they not doubt?
Forma con V-ing
must I not be doubting? must you not be doubting? must he not be doubting? must we not be doubting? must you not be doubting? must they not be doubting?
Perfetto
must I not have doubted? must you not have doubted? must he not have doubted? must we not have doubted? must you not have doubted? must they not have doubted?
Perfetto con V-ing
must I not have been doubting? must you not have been doubting? must he not have been doubting? must we not have been doubting? must you not have been doubting? must they not have been doubting?