对…有坏处英语怎么说

"对...有坏处" 的英文表达是 "harmful to..."。这个短语的来源是由 "harm"（伤害）和 "ful"（充满）组成。

例句：

Smoking is harmful to your health. (吸烟对你的健康有害。)
Eating too much sugar can be harmful to your teeth. (吃太多糖对牙齿有害。)
Staying up late is harmful to your mental health. (熬夜对你的心理健康有害。)