这句话的时态是现在完成时,所以''become''要用它的过去分词形式,即改为''became''亲，过去分词是become啊啊对，是我错了。不过我知道了，错还是在''become''上，因为它是个瞬间动词，不能用来表示一段时间(for many years)。所以应该改成''He has been a professional soccer player for many years.