I must perk you must perk he must perk we must perk you must perk they must perk
Forma con V-ing
I must be perking you must be perking he must be perking we must be perking you must be perking they must be perking
Perfetto
I must have perked you must have perked he must have perked we must have perked you must have perked they must have perked
Perfetto con V-ing
I must have been perking you must have been perking he must have been perking we must have been perking you must have been perking they must have been perking
Negazione
Forma semplice
I mustn't perk you mustn't perk he mustn't perk we mustn't perk you mustn't perk they mustn't perk
Forma con V-ing
I mustn't be perking you mustn't be perking he mustn't be perking we mustn't be perking you mustn't be perking they mustn't be perking
Perfetto
I mustn't have perked you mustn't have perked he mustn't have perked we mustn't have perked you mustn't have perked they mustn't have perked
Perfetto con V-ing
I mustn't have been perking you mustn't have been perking he mustn't have been perking we mustn't have been perking you mustn't have been perking they mustn't have been perking
Forma interrogativa
Forma semplice
must I perk? must you perk? must he perk? must we perk? must you perk? must they perk?
Forma con V-ing
must I be perking? must you be perking? must he be perking? must we be perking? must you be perking? must they be perking?
Perfetto
must I have perked? must you have perked? must he have perked? must we have perked? must you have perked? must they have perked?
Perfetto con V-ing
must I have been perking? must you have been perking? must he have been perking? must we have been perking? must you have been perking? must they have been perking?
Forma interro-negativa
Forma semplice
mustn't I perk? mustn't you perk? mustn't he perk? mustn't we perk? mustn't you perk? mustn't they perk?
Forma con V-ing
mustn't I be perking? mustn't you be perking? mustn't he be perking? mustn't we be perking? mustn't you be perking? mustn't they be perking?
Perfetto
mustn't I have perked? mustn't you have perked? mustn't he have perked? mustn't we have perked? mustn't you have perked? mustn't they have perked?
Perfetto con V-ing
mustn't I have been perking? mustn't you have been perking? mustn't he have been perking? mustn't we have been perking? mustn't you have been perking? mustn't they have been perking?