我们已经努力了多次，但是他仍然不能提供这些证件。的翻译：We have tried several times, but he still cannot provide these documents. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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We have tried several times, but he still cannot provide these documents.

We already diligently many times, but he still could not provide these credentials.

We have tried for many times, but he was still unable to provide these documents.

We have tried several times, but he still cannot provide these documents.