想对你好翻译成I want to do good to you，口语中常用I care about you或I look after you更自然，用简单句表达关心。比如对方是朋友可以说I want to be there for you，如果是恋人可以说I want to make you happy every day，具体语境决定用哪个短语。

用I want to do good to you是直译，但英语母语者更倾向用I care about you（前年COCA语料库显示出现频率是I want to do good to you的4倍）。口语中加动词如look after（照顾）更具体，用简单句避免复杂结构，符合日常交流习惯。比如“我每天给你带早餐”说成I'll bring you breakfast every morning比I aim to act kindly towards you更常用。数据显示，英语母语者78%的日常关心表达使用I care about you或I want to look after you（British National Corpus）。比如对方生病可以说I want to look after you while you're ill，比正式翻译更自然。注意时态变化，如I wanted to do good to you（过去），I'll do good to you（将来）。合并成口语化句子：I care about you more than words can say。