could slave
Verbo regular: slave - slaved- slaved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could slave
you could slave
she could slave
we could slave
you could slave
they could slave 	I could be slaving
you could be slaving
she could be slaving
we could be slaving
you could be slaving
they could be slaving	I could have slaved
you could have slaved
she could have slaved
we could have slaved
you could have slaved
they could have slaved	I could have been slaving
you could have been slaving
she could have been slaving
we could have been slaving
you could have been slaving
they could have been slaving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not slave
you could not slave
she could not slave
we could not slave
you could not slave
they could not slave 	I could not be slaving
you could not be slaving
she could not be slaving
we could not be slaving
you could not be slaving
they could not be slaving	I could not have slaved
you could not have slaved
she could not have slaved
we could not have slaved
you could not have slaved
they could not have slaved	I could not have been slaving
you could not have been slaving
she could not have been slaving
we could not have been slaving
you could not have been slaving
they could not have been slaving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I slave?
could you slave?
could she slave?
could we slave?
could you slave?
could they slave? 	could I be slaving?
could you be slaving?
could she be slaving?
could we be slaving?
could you be slaving?
could they be slaving? 	could I have slaved?
could you have slaved?
could she have slaved?
could we have slaved?
could you have slaved?
could they have slaved? 	could I have been slaving?
could you have been slaving?
could she have been slaving?
could we have been slaving?
could you have been slaving?
could they have been slaving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not slave?
could you not slave?
could she not slave?
could we not slave?
could you not slave?
could they not slave? 	could I not be slaving?
could you not be slaving?
could she not be slaving?
could we not be slaving?
could you not be slaving?
could they not be slaving? 	could I not have slaved?
could you not have slaved?
could she not have slaved?
could we not have slaved?
could you not have slaved?
could they not have slaved? 	could I not have been slaving?
could you not have been slaving?
could she not have been slaving?
could we not have been slaving?
could you not have been slaving?
could they not have been slaving?