→ kaifrankwind: 前面主要子句太長，喘口氣用的 06/07 22:42
Our manager instructed us that the current room rate would be quotable only un
til the end of month, when a rate increase would go into effect.
請問為什麼這句話在when前面要加逗號呢？
這個副詞子句算是從屬子句還是補充句？
謝謝
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