The documentsfor which they were searching have been recovered.能不能换成The documents that they were searching for have been recovered.

The documentsfor which they were searching have been recovered.能不能换成The documents that they were searching for have been recovered.

可以这样改.that还可以换成which.即：
The documents that/which they were searching for have been recovered.
但是,原句“The documentsfor which they were searching have been recovered”中的which就不能换成that了,因为它紧跟在介词for的后面.
如果把for which they were searching这个定语从句还原成独立的句子,就是：
They were searching for the documents.
search for 寻找

The documents for which they were searching have been recovered.
翻译：他们正在找寻的那些文件已经被恢复了。
可能是在电脑上找删除的文件，通过一些软件可以恢复!

我觉得是可以更换成The documents that they were searching for have been recover...

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The documents for which they were searching have been recovered.
翻译：他们正在找寻的那些文件已经被恢复了。
可能是在电脑上找删除的文件，通过一些软件可以恢复!

我觉得是可以更换成The documents that they were searching for have been recovered.

祝贺你！

收起

这是定从 that=which 可以啊。。。