failed to do sth.还是failed in sth.?

fail to do sth. 没有，不能

fail in（doing）sth.在……方面失败

例如：

I fail to see why you find it so amusing. 我弄不懂你们为什么对这件事感到如此好笑。

He never fails to phone his mother on her birthday.每逢母亲过生日时，他都会打电话给她。

The chairman failed in trying to persuade the committee to share his opinion.主席未能说服委员会同意他的观点。

He has been failing in health for the last two years. 近两年来，他的健康状况一直在衰退。
fail in sth 和fail st用不能直接用

扩展阅读：failed to load libmain ... manage doing ... its great fun doing ... succeed in doing sth ... failto dofail doing ... have failed to do so ... failedtoloadcustom ... failed to load image ... failure to initialize ...