I may birl you may birl he may birl we may birl you may birl they may birl
Forma con V-ing
I may be birling you may be birling he may be birling we may be birling you may be birling they may be birling
Perfecto
I may have birled you may have birled he may have birled we may have birled you may have birled they may have birled
Perfecto con V-ing
I may have been birling you may have been birling he may have been birling we may have been birling you may have been birling they may have been birling
Negación
Forma simple
I may not birl you may not birl he may not birl we may not birl you may not birl they may not birl
Forma con V-ing
I may not be birling you may not be birling he may not be birling we may not be birling you may not be birling they may not be birling
Perfecto
I may not have birled you may not have birled he may not have birled we may not have birled you may not have birled they may not have birled
Perfecto con V-ing
I may not have been birling you may not have been birling he may not have been birling we may not have been birling you may not have been birling they may not have been birling
Forma interrogativa
Forma simple
may I birl? may you birl? may he birl? may we birl? may you birl? may they birl?
Forma con V-ing
may I be birling? may you be birling? may he be birling? may we be birling? may you be birling? may they be birling?
Perfecto
may I have birled? may you have birled? may he have birled? may we have birled? may you have birled? may they have birled?
Perfecto con V-ing
may I have been birling? may you have been birling? may he have been birling? may we have been birling? may you have been birling? may they have been birling?
Forma interro-negativa
Forma simple
may I not birl? may you not birl? may he not birl? may we not birl? may you not birl? may they not birl?
Forma con V-ing
may I not be birling? may you not be birling? may he not be birling? may we not be birling? may you not be birling? may they not be birling?
Perfecto
may I not have birled? may you not have birled? may he not have birled? may we not have birled? may you not have birled? may they not have birled?
Perfecto con V-ing
may I not have been birling? may you not have been birling? may he not have been birling? may we not have been birling? may you not have been birling? may they not have been birling?