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简介：
原形 过去式 过去分词 意思
am/is was been 是
are were been 是
bear bore born 忍受
beat beat beaten 打;敲打
become became become 成为;变成
begin began begun 开始
blow blew blown 吹
break broke broken 打坏;打破
bring brought brought 带来
build built built 建筑;建设
burn burnt burnt 燃烧
buy bought bought 买
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