must sightsee
Verbo regular: sightsee - sightseed- sightseed

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