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的过去式及过去分词还有“成found 用法好像found是find的过去式及过去分词还有“成立”的意思？到底是怎么回事？请具体讲讲，好吗？找到find-foun...

he zoo with my father last Sunday. 上周日我和我爸爸去动物园了。 They weren't able to come beca...