He bragged that the test was easy, but when he saw his grade he changed his tune.他吹牛说考试很简单，但看到自己的分数时却变了口气。

Now he's singing a different tune.现在他又换了腔调。

They say they're not worried about money, but once they see how much the new equipment will cost, they'll be singing a different tune.他们说并不怕花钱，但是一旦知道新设备的价格，他们就不会那么说了。