The new English dictionary i bought yesterday,cost me almost twenty yuan

问题描述:

The new English dictionary i bought yesterday,cost me almost twenty yuan
为什么用cost

cost这里其实不是原形而是cost的过去式,因为cost的变形时 cost cost cost所以这里不用变
而且这书是昨天买的所以是过去式I bought yesterday可以去掉在看这个句子就简单多了