Most verbs have past tense and past participle in –ed ( worked, played, listened). But many of the most frequent verbs are irregular:
许多动词都有以-ed结尾的过去式和过去分词形式。但是许多动词都有不规则的过去式和过去分词形式：
英语语法入门：不规则动词的过去式与过去分词形式
2012-05-26 00:00
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