两个句子意思是相同的，上面一句是主动语态，意思是”他的笑话使我们都笑了“; 下面一句是被动语态，意思是”我们都被逗笑了。“。

all of us “我们大家都”有两种用法：作主语(= we all)和宾语(=us all)

作主语：all of us = we all

All of us were made to laugh （by his joke).我们都被逗笑了。 (被动语态）

= We all were made to laugh (by his joke).

2. 作宾语：all of us = us all

His joke made us all laugh . （主动语态）他的笑话使我们都笑了。

= His joke made all of us laugh.

all of us做宾语时就变成了 us all，它们是同义词，意思都是”我们都“，都可以作宾语。

因为us 是宾格代词,是作宾语用的，us all 中的all, 是代词，作us的同位语。