Do you know what happend to him?对吗

来源：百度知道编辑：UC知道时间：2024/05/25 05:21:16

正确。不过happend应该是拼错了，正确的是happened

what happened to him 相当于the thing which happened to him,
what在这里相当于复合型的关系代词，引导了一个名词从句，作主句know的宾语。

对的.

right