could grave
Verbo regular: grave - graved- graved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could grave
you could grave
he could grave
we could grave
you could grave
they could grave 	I could be graving
you could be graving
he could be graving
we could be graving
you could be graving
they could be graving	I could have graved
you could have graved
he could have graved
we could have graved
you could have graved
they could have graved	I could have been graving
you could have been graving
he could have been graving
we could have been graving
you could have been graving
they could have been graving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not grave
you could not grave
he could not grave
we could not grave
you could not grave
they could not grave 	I could not be graving
you could not be graving
he could not be graving
we could not be graving
you could not be graving
they could not be graving	I could not have graved
you could not have graved
he could not have graved
we could not have graved
you could not have graved
they could not have graved	I could not have been graving
you could not have been graving
he could not have been graving
we could not have been graving
you could not have been graving
they could not have been graving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I grave?
could you grave?
could he grave?
could we grave?
could you grave?
could they grave? 	could I be graving?
could you be graving?
could he be graving?
could we be graving?
could you be graving?
could they be graving? 	could I have graved?
could you have graved?
could he have graved?
could we have graved?
could you have graved?
could they have graved? 	could I have been graving?
could you have been graving?
could he have been graving?
could we have been graving?
could you have been graving?
could they have been graving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not grave?
could you not grave?
could he not grave?
could we not grave?
could you not grave?
could they not grave? 	could I not be graving?
could you not be graving?
could he not be graving?
could we not be graving?
could you not be graving?
could they not be graving? 	could I not have graved?
could you not have graved?
could he not have graved?
could we not have graved?
could you not have graved?
could they not have graved? 	could I not have been graving?
could you not have been graving?
could he not have been graving?
could we not have been graving?
could you not have been graving?
could they not have been graving?