他可能去图书馆了，但是我不能确定的翻译：He may have gone to the library, but I'm not sure 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

He may go to the library, but I'm not sure

He may have gone to the library, but I'm not sure

He possibly went to the library, but I could not determine

He may go to the library, but I am not sure

He may have gone to the library, but I'm not sure