所有不规则的动词过去式分词

　　begin 开始 began begun

　　bend 使弯曲 bent bent

　　bet 赌 bet bet

　　bite 咬 bit bitten/bit

　　blow 吹 blew blown

　　break 打破 broke broken

　　bring 拿来 brought brought

　　build 建造 built built

　　burn 燃烧 burnt/burned burnt/burned

　　buy 买 bought bought

　　can 能 could