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