请教一个begun/began的问题～ 谢谢！！！

ritarong

An attempt to ratify the Equal Rights Amendment, begun almost two decades ago, has been unsuccessful despite efforts by many important groups, including the National Organization for Women.
(A) to ratify the Equal Rights Amendment, begun almost two decades ago,
(B) begun almost two decades ago, for ratifying the Equal Rights Amendment
(C) begun for ratifying the Equal Rights Amendment almost two decades ago
(D) at ratifying the Equal Rights Amendment, begun almost two decades ago,
(E) that has begun almost two decades ago to ratify the Equal Rights Amendment

答案是a，我想问问为什么是begun，不应该是began么？ ～
谢谢！

jbc88

begun是过去分词。began是过去式。

CharleneH

begun过去分词做定语修饰attempt，所以后面has been前面不用加连词。这里的begun是不及物动词，过去分词做定语不代表被动，是主动，主要强调动作完成。一般及物动词的过去分词做定语是表示被动和动作完成。