could oil
Verbo regular: oil - oiled- oiled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could oil
you could oil
he could oil
we could oil
you could oil
they could oil 	I could be oiling
you could be oiling
he could be oiling
we could be oiling
you could be oiling
they could be oiling	I could have oiled
you could have oiled
he could have oiled
we could have oiled
you could have oiled
they could have oiled	I could have been oiling
you could have been oiling
he could have been oiling
we could have been oiling
you could have been oiling
they could have been oiling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not oil
you could not oil
he could not oil
we could not oil
you could not oil
they could not oil 	I could not be oiling
you could not be oiling
he could not be oiling
we could not be oiling
you could not be oiling
they could not be oiling	I could not have oiled
you could not have oiled
he could not have oiled
we could not have oiled
you could not have oiled
they could not have oiled	I could not have been oiling
you could not have been oiling
he could not have been oiling
we could not have been oiling
you could not have been oiling
they could not have been oiling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I oil?
could you oil?
could he oil?
could we oil?
could you oil?
could they oil? 	could I be oiling?
could you be oiling?
could he be oiling?
could we be oiling?
could you be oiling?
could they be oiling? 	could I have oiled?
could you have oiled?
could he have oiled?
could we have oiled?
could you have oiled?
could they have oiled? 	could I have been oiling?
could you have been oiling?
could he have been oiling?
could we have been oiling?
could you have been oiling?
could they have been oiling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not oil?
could you not oil?
could he not oil?
could we not oil?
could you not oil?
could they not oil? 	could I not be oiling?
could you not be oiling?
could he not be oiling?
could we not be oiling?
could you not be oiling?
could they not be oiling? 	could I not have oiled?
could you not have oiled?
could he not have oiled?
could we not have oiled?
could you not have oiled?
could they not have oiled? 	could I not have been oiling?
could you not have been oiling?
could he not have been oiling?
could we not have been oiling?
could you not have been oiling?
could they not have been oiling?