If you'd already known that you wouldn't be coming,why didn't you say so earlier?这是最标准的说法.另外,楼上几位都有些瑕疵,我来帮他们修正：一楼应该是：If you already (already=早) knew you couldn't come...
英文翻译..你要是早知道今天来不了,怎么不早点说啊?
If you'd already known that you wouldn't be coming,why didn't you say so earlier?这是最标准的说法.另外,楼上几位都有些瑕疵,我来帮他们修正：一楼应该是：If you already (already=早) knew you couldn't come...