[求譯] be being!!!

[IEEE5566 (我不會被擊倒)]

想請問一個文法問題!!
1. He is proud of his father's being rich
2. He is proud that his father is rich.

his father's being rich V.S. his father is rich, 在用法上有什麼不同嗎?!
分不太清楚 be being 在什麼情況可以轉換!!

thanks

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推 chubbybunny:that後面可以加子句 his father is rish 是完整的句子
→ chubbybunny:第一句的father's 應該是"爸爸的"
→ chubbybunny:試著解釋  有錯請指正  謝謝:)