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