could overstay
Verbo regular: overstay - overstayed- overstayed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could overstay
you could overstay
he could overstay
we could overstay
you could overstay
they could overstay 	I could be overstaying
you could be overstaying
he could be overstaying
we could be overstaying
you could be overstaying
they could be overstaying	I could have overstayed
you could have overstayed
he could have overstayed
we could have overstayed
you could have overstayed
they could have overstayed	I could have been overstaying
you could have been overstaying
he could have been overstaying
we could have been overstaying
you could have been overstaying
they could have been overstaying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not overstay
you could not overstay
he could not overstay
we could not overstay
you could not overstay
they could not overstay 	I could not be overstaying
you could not be overstaying
he could not be overstaying
we could not be overstaying
you could not be overstaying
they could not be overstaying	I could not have overstayed
you could not have overstayed
he could not have overstayed
we could not have overstayed
you could not have overstayed
they could not have overstayed	I could not have been overstaying
you could not have been overstaying
he could not have been overstaying
we could not have been overstaying
you could not have been overstaying
they could not have been overstaying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I overstay?
could you overstay?
could he overstay?
could we overstay?
could you overstay?
could they overstay? 	could I be overstaying?
could you be overstaying?
could he be overstaying?
could we be overstaying?
could you be overstaying?
could they be overstaying? 	could I have overstayed?
could you have overstayed?
could he have overstayed?
could we have overstayed?
could you have overstayed?
could they have overstayed? 	could I have been overstaying?
could you have been overstaying?
could he have been overstaying?
could we have been overstaying?
could you have been overstaying?
could they have been overstaying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not overstay?
could you not overstay?
could he not overstay?
could we not overstay?
could you not overstay?
could they not overstay? 	could I not be overstaying?
could you not be overstaying?
could he not be overstaying?
could we not be overstaying?
could you not be overstaying?
could they not be overstaying? 	could I not have overstayed?
could you not have overstayed?
could he not have overstayed?
could we not have overstayed?
could you not have overstayed?
could they not have overstayed? 	could I not have been overstaying?
could you not have been overstaying?
could he not have been overstaying?
could we not have been overstaying?
could you not have been overstaying?
could they not have been overstaying?