Grammatical Correctness. I believe both are grammatically correct. If you take out the apostrophes you can write: It has been a while since I have sat at a ... ... <看更多>

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Hello, it's been a while since I've been in - is the branzino back on the menu? (fingers crossed, please say yes!) ... <看更多>

提供It's been a while since相關PTT/Dcard文章，想要了解更多it's been a long time意思、It's been a while since、It has been a while有關電玩與手遊文章或書籍， ... ... <看更多>

提供It's been a while since相關PTT/Dcard文章，想要了解更多it's been a long time意思、It's been a while since、It has been a while有關電玩與手遊文章或書籍， ... ... <看更多>