could ferment
Verbo regular: ferment - fermented- fermented

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could ferment
you could ferment
she could ferment
we could ferment
you could ferment
they could ferment 	I could be fermenting
you could be fermenting
she could be fermenting
we could be fermenting
you could be fermenting
they could be fermenting	I could have fermented
you could have fermented
she could have fermented
we could have fermented
you could have fermented
they could have fermented	I could have been fermenting
you could have been fermenting
she could have been fermenting
we could have been fermenting
you could have been fermenting
they could have been fermenting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not ferment
you could not ferment
she could not ferment
we could not ferment
you could not ferment
they could not ferment 	I could not be fermenting
you could not be fermenting
she could not be fermenting
we could not be fermenting
you could not be fermenting
they could not be fermenting	I could not have fermented
you could not have fermented
she could not have fermented
we could not have fermented
you could not have fermented
they could not have fermented	I could not have been fermenting
you could not have been fermenting
she could not have been fermenting
we could not have been fermenting
you could not have been fermenting
they could not have been fermenting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I ferment?
could you ferment?
could she ferment?
could we ferment?
could you ferment?
could they ferment? 	could I be fermenting?
could you be fermenting?
could she be fermenting?
could we be fermenting?
could you be fermenting?
could they be fermenting? 	could I have fermented?
could you have fermented?
could she have fermented?
could we have fermented?
could you have fermented?
could they have fermented? 	could I have been fermenting?
could you have been fermenting?
could she have been fermenting?
could we have been fermenting?
could you have been fermenting?
could they have been fermenting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not ferment?
could you not ferment?
could she not ferment?
could we not ferment?
could you not ferment?
could they not ferment? 	could I not be fermenting?
could you not be fermenting?
could she not be fermenting?
could we not be fermenting?
could you not be fermenting?
could they not be fermenting? 	could I not have fermented?
could you not have fermented?
could she not have fermented?
could we not have fermented?
could you not have fermented?
could they not have fermented? 	could I not have been fermenting?
could you not have been fermenting?
could she not have been fermenting?
could we not have been fermenting?
could you not have been fermenting?
could they not have been fermenting?