researhers have found that caring for the elderly

请帮忙翻译一下，是什么意思？
是别人问我的，我就把原句贴上了，我自己觉得，researhers也可能漏了一个字母，实在抱歉啊。

Have ( ). have will have have & have got have是什么意思 关于have have done have,has have & be have been与have gone have与have got 区别