bought本身就是buy的过去式,没有过去式的.bought[英][b:t][美][bt] v.购买,购得( buy的过去式和过去分词 ); 做出牺牲以获得; 够支付; 买通; Where's the beef I bought today? 我今天买的牛肉在哪?buy[英][ba][美][ba] vt.& vi.购买,购得; n.交易,买卖; 便宜货; vt.够支付; 买通; 收买; 贿赂; Did you buy new shoes? 你买的新鞋?
意思不变,只是用于不同的时态.eg.I bought a pen yesterday.我昨天买了一支钢笔. I have bought a pen. 我已经买了一支笔. My mom had bought a dress for me when I was born.我出生的时候,妈妈就给我买了一件连衣裙.
bought 购买,动词buy的过去式,后面通常接名词做宾语.当然,有时名词之前也可以有过去分词等定语.例如I bought some newly-published books yesterday .
buy_bought_bought bring_brought_brought 原形过去式过去分词,楼主,以后也这么记,上学时老师一直这么教,不容易错!
I bought a new skirt yesterday.My mother bought a new skirt for me yesterday.