Is 他的自行车被我买了 grammatically wrong? 他的自行车被我买了. (His bicycle was bought by me.)


As I learn, 被 structure tends to be used in negative conditions. In this sentence, I think it is not wrong but not smooth. 

Can anyone explain if it is grammatically wrong and suggest me a better option?
I think there is no wrong in your sentence.

You could also said like:

"我買了他的自行車" = "I bought his bicycle."

PS: 被 is not all negative, it should be "passive".(passively?)