But for waiting for you, we might have already arrived there.
若不是因为等你，我们可能已经抵达那儿了。
But for her help, I couldn't have finished this work.
若不是因为她帮忙，我是不可能完成这个工作的。
I'd have been lost but for your help.
要不是你，我就迷路了。