impact没有褒义或贬义区分,是中性词.可做动词或名词,常与介词on连用.
例句：The anti-smoking campaign made quite an impact on young people.
和good、bad可以搭配,但更常见与以下形容词搭配：
（正面）positive,favorable,beneficial
（反面）negative,adverse,destructive
求采!