beharmfulfor后面接名词,多是人或物,如Eatingjunkfoodisharmfulforyou.beharmfulto意思是“对......有害”。例如：chemicalsthatareharmfultotheenvironment对环境有害的化学品（摘自《朗文高级英语应试词典》英汉双解）,后面接动词,如Itisharmfultoeatjunkfood.beharmfulfor+doing或事物beharmfulto+sb在某些情况可以通用.beharmful(to)(对……)有害例1：Smokingisharmfultoyourhealth.吸烟有害于你的健康。例2：Readinginbedisharmfultoyoureyesight.躺在床上看书对你的视力有害。例3：Itcanhelpstabilizethesituation,andforalongtimetoo,andisharmfultoneitherside.这样能向人民交代，局势可以稳定，并且是长期稳定，也不伤害哪一方。例4：Ifweareweakandirresolute,ifwearetolerantandindulgent,itwillbringharmtothepeopleandalienateusfromthemasses如果我们优柔寡断，姑息养奸，则将遗祸人民，脱离群众。例5：Ifweareweakandirresolute,ifwearetolerantandindulgent,itwillbringharmtothepeopleandalienateusfromthemasses.如果我们优柔寡断，姑息养奸，则将遗祸人民，脱离群众。例6：Whenthefourweaselsfeltthattheywerefreefromharmtheywalkedtowardthechickencoop这四只黄鼠狼觉得后顾无忧，就朝着鸡圈走去。例7：ItoldherifshedidmeanyharmIwouldreturntitfortat.我告诉她，如果她伤害我，我会对她以牙还牙。