I must sightsee you must sightsee he must sightsee we must sightsee you must sightsee they must sightsee
Forma com V-ing
I must be sightseeing you must be sightseeing he must be sightseeing we must be sightseeing you must be sightseeing they must be sightseeing
Perfeito
I must have sightseed you must have sightseed he must have sightseed we must have sightseed you must have sightseed they must have sightseed
Perfeito com V-ing
I must have been sightseeing you must have been sightseeing he must have been sightseeing we must have been sightseeing you must have been sightseeing they must have been sightseeing
Negação
Forma simple
I mustn't sightsee you mustn't sightsee he mustn't sightsee we mustn't sightsee you mustn't sightsee they mustn't sightsee
Forma com V-ing
I mustn't be sightseeing you mustn't be sightseeing he mustn't be sightseeing we mustn't be sightseeing you mustn't be sightseeing they mustn't be sightseeing
Perfeito
I mustn't have sightseed you mustn't have sightseed he mustn't have sightseed we mustn't have sightseed you mustn't have sightseed they mustn't have sightseed
Perfeito com V-ing
I mustn't have been sightseeing you mustn't have been sightseeing he mustn't have been sightseeing we mustn't have been sightseeing you mustn't have been sightseeing they mustn't have been sightseeing
Forma interrogativa
Forma simple
must I sightsee? must you sightsee? must he sightsee? must we sightsee? must you sightsee? must they sightsee?
Forma com V-ing
must I be sightseeing? must you be sightseeing? must he be sightseeing? must we be sightseeing? must you be sightseeing? must they be sightseeing?
Perfeito
must I have sightseed? must you have sightseed? must he have sightseed? must we have sightseed? must you have sightseed? must they have sightseed?
Perfeito com V-ing
must I have been sightseeing? must you have been sightseeing? must he have been sightseeing? must we have been sightseeing? must you have been sightseeing? must they have been sightseeing?
Forma interro-Negação
Forma simple
mustn't I sightsee? mustn't you sightsee? mustn't he sightsee? mustn't we sightsee? mustn't you sightsee? mustn't they sightsee?
Forma com V-ing
mustn't I be sightseeing? mustn't you be sightseeing? mustn't he be sightseeing? mustn't we be sightseeing? mustn't you be sightseeing? mustn't they be sightseeing?
Perfeito
mustn't I have sightseed? mustn't you have sightseed? mustn't he have sightseed? mustn't we have sightseed? mustn't you have sightseed? mustn't they have sightseed?
Perfeito com V-ing
mustn't I have been sightseeing? mustn't you have been sightseeing? mustn't he have been sightseeing? mustn't we have been sightseeing? mustn't you have been sightseeing? mustn't they have been sightseeing?