I may bill you may bill he may bill we may bill you may bill they may bill
Forma com V-ing
I may be billing you may be billing he may be billing we may be billing you may be billing they may be billing
Perfeito
I may have billed you may have billed he may have billed we may have billed you may have billed they may have billed
Perfeito com V-ing
I may have been billing you may have been billing he may have been billing we may have been billing you may have been billing they may have been billing
Negação
Forma simple
I may not bill you may not bill he may not bill we may not bill you may not bill they may not bill
Forma com V-ing
I may not be billing you may not be billing he may not be billing we may not be billing you may not be billing they may not be billing
Perfeito
I may not have billed you may not have billed he may not have billed we may not have billed you may not have billed they may not have billed
Perfeito com V-ing
I may not have been billing you may not have been billing he may not have been billing we may not have been billing you may not have been billing they may not have been billing
Forma interrogativa
Forma simple
may I bill? may you bill? may he bill? may we bill? may you bill? may they bill?
Forma com V-ing
may I be billing? may you be billing? may he be billing? may we be billing? may you be billing? may they be billing?
Perfeito
may I have billed? may you have billed? may he have billed? may we have billed? may you have billed? may they have billed?
Perfeito com V-ing
may I have been billing? may you have been billing? may he have been billing? may we have been billing? may you have been billing? may they have been billing?
Forma interro-Negação
Forma simple
may I not bill? may you not bill? may he not bill? may we not bill? may you not bill? may they not bill?
Forma com V-ing
may I not be billing? may you not be billing? may he not be billing? may we not be billing? may you not be billing? may they not be billing?
Perfeito
may I not have billed? may you not have billed? may he not have billed? may we not have billed? may you not have billed? may they not have billed?
Perfeito com V-ing
may I not have been billing? may you not have been billing? may he not have been billing? may we not have been billing? may you not have been billing? may they not have been billing?