参加了关爱老人志愿服务用英语怎么说

"Participated in volunteer service for the elderly care" 可以用英文表示为 "participated in volunteering for elderly care"。

"Volunteer service" 是指自愿为了公益或社会服务而做的工作，"for the elderly care" 则指针对老年人的关爱。

下面是一些例句：

I participated in a volunteer program that helped provide care for elderly residents in a local nursing home.
I spent my summer volunteering at a daycare center for the elderly.
I joined a community group that regularly visits and assists elderly citizens in need of care.

其中文翻译为：

我参加了一个志愿者项目，帮助为当地养老院的老年居民提供关爱。
我在一家老年人关爱中心度过了我的暑假做志愿者。
我加入了一个社区团体，定期拜访并帮助需要关爱的老年公民。