I may sightsee you may sightsee he may sightsee we may sightsee you may sightsee they may sightsee
Forma con V-ing
I may be sightseeing you may be sightseeing he may be sightseeing we may be sightseeing you may be sightseeing they may be sightseeing
Perfecto
I may have sightseed you may have sightseed he may have sightseed we may have sightseed you may have sightseed they may have sightseed
Perfecto con V-ing
I may have been sightseeing you may have been sightseeing he may have been sightseeing we may have been sightseeing you may have been sightseeing they may have been sightseeing
Negación
Forma simple
I mayn't sightsee you mayn't sightsee he mayn't sightsee we mayn't sightsee you mayn't sightsee they mayn't sightsee
Forma con V-ing
I mayn't be sightseeing you mayn't be sightseeing he mayn't be sightseeing we mayn't be sightseeing you mayn't be sightseeing they mayn't be sightseeing
Perfecto
I mayn't have sightseed you mayn't have sightseed he mayn't have sightseed we mayn't have sightseed you mayn't have sightseed they mayn't have sightseed
Perfecto con V-ing
I mayn't have been sightseeing you mayn't have been sightseeing he mayn't have been sightseeing we mayn't have been sightseeing you mayn't have been sightseeing they mayn't have been sightseeing
Forma interrogativa
Forma simple
may I sightsee? may you sightsee? may he sightsee? may we sightsee? may you sightsee? may they sightsee?
Forma con V-ing
may I be sightseeing? may you be sightseeing? may he be sightseeing? may we be sightseeing? may you be sightseeing? may they be sightseeing?
Perfecto
may I have sightseed? may you have sightseed? may he have sightseed? may we have sightseed? may you have sightseed? may they have sightseed?
Perfecto con V-ing
may I have been sightseeing? may you have been sightseeing? may he have been sightseeing? may we have been sightseeing? may you have been sightseeing? may they have been sightseeing?
Forma interro-negativa
Forma simple
mayn't I sightsee? mayn't you sightsee? mayn't he sightsee? mayn't we sightsee? mayn't you sightsee? mayn't they sightsee?
Forma con V-ing
mayn't I be sightseeing? mayn't you be sightseeing? mayn't he be sightseeing? mayn't we be sightseeing? mayn't you be sightseeing? mayn't they be sightseeing?
Perfecto
mayn't I have sightseed? mayn't you have sightseed? mayn't he have sightseed? mayn't we have sightseed? mayn't you have sightseed? mayn't they have sightseed?
Perfecto con V-ing
mayn't I have been sightseeing? mayn't you have been sightseeing? mayn't he have been sightseeing? mayn't we have been sightseeing? mayn't you have been sightseeing? mayn't they have been sightseeing?