=has not;

The city attorney's office hasn't found any evidence of criminal wrongdoing.
市检察官办公室尚未发现任何刑事犯罪的证据。
来源:《柯林斯高阶英汉双解学习词典》She hasn't been seen for four days and there is concern for her safety.
她已四天不见踪影,大家对她的安全很担心。
来源:《牛津高阶英汉双解词典》Rick hasn't changed. He looks exactly the same as he did at school.
里克一点儿没变,他和上学时一模一样。
来源:《牛津高阶英汉双解词典》Her first novel was published in 1998 and since then she hasn't looked back.
她的第一部小说于1998年发表,从此她便一发而不可收。
来源:《牛津高阶英汉双解词典》
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