核心差别
health 强调健康是指身体和心理的良好状态，healthy 则侧重healthy 指身体或心理状态良好
使用场景对比
| 对比方面 | health | healthy |
|---|---|---|
| 核心含义 | 健康是指身体和心理的良好状态，包括没有疾病、精力充沛和整体福祉。 | healthy 指身体或心理状态良好，也形容事物有益健康或运作正常，强调整体良好状态。 |
| 词性 | 名词 | 形容词 |
| 使用语域 | 常用于描述个人或群体的健康状况，如"in good/poor health"表示健康好坏，也可用于表达对健康的关心或建议。 | healthy 常用作定语或表语，描述人或事物的健康状态，如 "a healthy person" 或 "stay healthy"。 |
对比例句
health
Regular exercise is important for maintaining good health.
定期锻炼对保持良好健康很重要。
health
She has been in poor health since last winter.
自从去年冬天以来，她的健康状况一直不佳。
healthy
Eating fruits and vegetables helps you stay healthy.
吃水果和蔬菜有助于保持健康。
healthy
She looks very healthy after her vacation.
度假后她看起来非常健康。
常见误用提醒
使用 health：I have a good health. → I am in good health. / I have good health. (中文常说"有好健康"，但英语中"health"作为不可数名词，通常不与"a"连用；正确说法是"in good health"或直接说"have good health"。)
使用 health：He cares his health very much. → He cares about his health very much. ("care"作为动词时，常与介词"about"连用表示关心；正确句型是"care about something"，所以这里应为"care about his health"。)
使用 healthy：I am health. → I am healthy. (health 是名词，不能直接作表语；healthy 是形容词，应使用 healthy 来描述状态。)