首先我们来看下be good to和be good for的大致意思：
be good to：词性为短语，表示待人友好、善待某人
be good for：词性为短语，表示对某人或某事物有利或有好处
通过下面的表格我们了解下be good to和be good for的含义、发音和用法
接下来让我们看下be good to和be good for的用法区别：
1.词义：be good to表示待人友好、善待某人；be good for表示对某人或某事物有益或有好处
例子：
- He is always good to me.
(他总是很善待我。)
- This medicine is good for your health.
(这个药对你的健康有好处。)
2.语法结构：be good to后接人作宾语；be good for后接物作宾语
例子：
- She is very good to the children.
(她对孩子们非常友好。)
- The service of this restaurant is very good for tourists.
(这个饭店的服务对游客非常有好处。)
3.用途：be good to强调对人的友好行为；be good for强调对事物的积极影响
例子：
- He is always good to his employees.
(他对员工总是很友好。)
- Drinking more water is good for your body.
(多喝水对身体有好处。)
4.对象：be good to强调对他人的友好行为；be good for强调对个人或其他事物的好处
例子：
- She is good to her friends.
(她对朋友很好。)
- This article is good for students' learning.
(这篇文章对学生的学习很有帮助。)
5.搭配：be good to常与人名搭配；be good for常与事物名搭配
例子：
- He is always good to his family.
(他总是对自己的家人很好。)
- This food is good for boosting immunity.
(这种食物对增强免疫力很有好处。)
6.语义：be good to强调对他人的友善态度或积极行为；be good for强调对某人或某事物的积极影响
例子：
- He is always good to the elderly.
(他对老人总是非常友好。)
- Exercise is good for physical health.
(锻炼对身体健康有好处。)
begoodto“对……友好/和蔼”,其后接表示人或相应的名词.begoodfor“对……有益”,其后接表示人或事物的名词.例：Theyoungshouldbegoodtotheold.年轻人应该孝顺老人.Doingmorningexercisesisgoodforourhealth.做早操对我们的健康有益.