請告訴我 「她已經是大姐姐了」 的英語！

・You've become like an older sister totally.
・You've become more grown-up completely.

「你已經是大姐姐了」的英文可以用
You've become like an older sister totally. 或
You've become more grown-up completely. 等來表達。

How old are you? You've become like an older sister totally.
（你今年幾歲啦？你已經是大姐姐了喔。）

Time flies. You've become more grown-up completely.
（光陰似箭，你已經完全長大了。）
※ time flies 是常用的成語，意思是「時光飛逝、時間過得很快、歲月如梭」。

希望回答有幫助到你。

有幫助｜0