could buy
Verbo irregular: buy - bought- bought

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could buy
you could buy
she could buy
we could buy
you could buy
they could buy 	I could be buying
you could be buying
she could be buying
we could be buying
you could be buying
they could be buying	I could have bought
you could have bought
she could have bought
we could have bought
you could have bought
they could have bought	I could have been buying
you could have been buying
she could have been buying
we could have been buying
you could have been buying
they could have been buying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not buy
you could not buy
she could not buy
we could not buy
you could not buy
they could not buy 	I could not be buying
you could not be buying
she could not be buying
we could not be buying
you could not be buying
they could not be buying	I could not have bought
you could not have bought
she could not have bought
we could not have bought
you could not have bought
they could not have bought	I could not have been buying
you could not have been buying
she could not have been buying
we could not have been buying
you could not have been buying
they could not have been buying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I buy?
could you buy?
could she buy?
could we buy?
could you buy?
could they buy? 	could I be buying?
could you be buying?
could she be buying?
could we be buying?
could you be buying?
could they be buying? 	could I have bought?
could you have bought?
could she have bought?
could we have bought?
could you have bought?
could they have bought? 	could I have been buying?
could you have been buying?
could she have been buying?
could we have been buying?
could you have been buying?
could they have been buying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not buy?
could you not buy?
could she not buy?
could we not buy?
could you not buy?
could they not buy? 	could I not be buying?
could you not be buying?
could she not be buying?
could we not be buying?
could you not be buying?
could they not be buying? 	could I not have bought?
could you not have bought?
could she not have bought?
could we not have bought?
could you not have bought?
could they not have bought? 	could I not have been buying?
could you not have been buying?
could she not have been buying?
could we not have been buying?
could you not have been buying?
could they not have been buying?