I don’t know what they are looking fo句子分解一下用：连接代词/副词+主语+谓语+其他成分.

I don’t know what they are looking fo句子分解一下用：连接代词/副词+主语+谓语+其他成分.
I don’t know what they are looking fo
句子分解一下用：连接代词/副词+主语+谓语+其他成分.

I don’t know what they are looking fo句子分解一下用：连接代词/副词+主语+谓语+其他成分.
主句：I don't know + 宾语从句 what they are looking for
宾语从句中,疑问代词 what 做从句的宾语,更具体说,做介词 for 的宾语.