"坏孩子变成坏蛋"的英文表达是 "go bad" 或者 "turn bad"。这个表达源于俗语 "one bad apple spoils the whole bunch"，意思是"一个坏苹果会把整箱苹果都弄坏"。这个俗语暗示着坏的东西很容易传染或者影响周围的东西。
下面是一些例句：
He used to be such a good kid, but now he's gone bad. 他过去是个好孩子，但现在变坏了。
She was afraid that hanging out with the wrong crowd would turn her bad. 她担心和不好的朋友在一起会让自己变坏。
I'm worried that pving in the city will turn my son bad. 我担心住在城市会让我的儿子变坏。
下面是一些例句：
He used to be such a good kid, but now he's gone bad. 他过去是个好孩子，但现在变坏了。
She was afraid that hanging out with the wrong crowd would turn her bad. 她担心和不好的朋友在一起会让自己变坏。
I'm worried that pving in the city will turn my son bad. 我担心住在城市会让我的儿子变坏。