(bought, bought)
When prices are low, he buys.
一降价,他就去购物。
buy sb sth / buy sth for sb / sth:
buy him a gift / buy a gift for him
为他买礼物
He bought the car for $2,000.
他花2000美元买了那辆车。
He bought fame at the cost of his health and happiness.
他牺牲健康和幸福换来了名声。
He said it was a mistake, but I don’t buy it.
他说那是个失误,但我不相信。