could sightsee
Verbo regular: sightsee - sightseed- sightseed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sightsee
you could sightsee
he could sightsee
we could sightsee
you could sightsee
they could sightsee 	I could be sightseeing
you could be sightseeing
he could be sightseeing
we could be sightseeing
you could be sightseeing
they could be sightseeing	I could have sightseed
you could have sightseed
he could have sightseed
we could have sightseed
you could have sightseed
they could have sightseed	I could have been sightseeing
you could have been sightseeing
he could have been sightseeing
we could have been sightseeing
you could have been sightseeing
they could have been sightseeing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't sightsee
you couldn't sightsee
he couldn't sightsee
we couldn't sightsee
you couldn't sightsee
they couldn't sightsee 	I couldn't be sightseeing
you couldn't be sightseeing
he couldn't be sightseeing
we couldn't be sightseeing
you couldn't be sightseeing
they couldn't be sightseeing	I couldn't have sightseed
you couldn't have sightseed
he couldn't have sightseed
we couldn't have sightseed
you couldn't have sightseed
they couldn't have sightseed	I couldn't have been sightseeing
you couldn't have been sightseeing
he couldn't have been sightseeing
we couldn't have been sightseeing
you couldn't have been sightseeing
they couldn't have been sightseeing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sightsee?
could you sightsee?
could he sightsee?
could we sightsee?
could you sightsee?
could they sightsee? 	could I be sightseeing?
could you be sightseeing?
could he be sightseeing?
could we be sightseeing?
could you be sightseeing?
could they be sightseeing? 	could I have sightseed?
could you have sightseed?
could he have sightseed?
could we have sightseed?
could you have sightseed?
could they have sightseed? 	could I have been sightseeing?
could you have been sightseeing?
could he have been sightseeing?
could we have been sightseeing?
could you have been sightseeing?
could they have been sightseeing? 	

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