but when

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UK

A1 初級
conj.連接詞但是當…時
I wanted to go to the park, but when it started raining, I stayed home.
conj.連接詞可是當…
She planned to finish the project early, but when she got sick, she fell behind.
phr.片語但當…之時
The story seemed simple at first, but when you looked closer, it became quite complex.

影片字幕