Conjugação do verbo inglês
CAN BUY

Verbo irregular: buy - bought - bought

Afirmação

Forma simple	Forma com V-ing
I can buy you can buy he can buy we can buy you can buy they can buy	I can be buying you can be buying he can be buying we can be buying you can be buying they can be buying
Perfeito	Perfeito com V-ing
I can have bought you can have bought he can have bought we can have bought you can have bought they can have bought	I can have been buying you can have been buying he can have been buying we can have been buying you can have been buying they can have been buying

Negação

Forma simple	Forma com V-ing
I cannot buy you cannot buy he cannot buy we cannot buy you cannot buy they cannot buy	I cannot be buying you cannot be buying he cannot be buying we cannot be buying you cannot be buying they cannot be buying
Perfeito	Perfeito com V-ing
I cannot have bought you cannot have bought he cannot have bought we cannot have bought you cannot have bought they cannot have bought	I cannot have been buying you cannot have been buying he cannot have been buying we cannot have been buying you cannot have been buying they cannot have been buying

Forma interrogativa

Forma simple	Forma com V-ing
can I buy? can you buy? can he buy? can we buy? can you buy? can they buy?	can I be buying? can you be buying? can he be buying? can we be buying? can you be buying? can they be buying?
Perfeito	Perfeito com V-ing
can I have bought? can you have bought? can he have bought? can we have bought? can you have bought? can they have bought?	can I have been buying? can you have been buying? can he have been buying? can we have been buying? can you have been buying? can they have been buying?

Forma interro-Negação

Forma simple	Forma com V-ing
can I not buy? can you not buy? can he not buy? can we not buy? can you not buy? can they not buy?	can I not be buying? can you not be buying? can he not be buying? can we not be buying? can you not be buying? can they not be buying?
Perfeito	Perfeito com V-ing
can I not have bought? can you not have bought? can he not have bought? can we not have bought? can you not have bought? can they not have bought?	can I not have been buying? can you not have been buying? can he not have been buying? can we not have been buying? can you not have been buying? can they not have been buying?