翻译：要想让别人明白你的意思,首先你自己得表达清楚(过去分词作宾语补语)

If you want to make yourself understood, you have to make yourself cleared.

要想让别人明白你的意思,首先你自己得表达清楚
Must want to let others understand that your meaning, first you must express clearly

You must be sure that you express clearly if you want youself understood.
yourself是宾语。
Understood过去分词做宾补。

To let other people know well about what u mean, u have to make urself clear enough in the first place.