She knows nothing but eating还是She knows nothing but eat

问题描述:

She knows nothing but eating还是She knows nothing but eat

我觉得这里是介词,而非表转折的连词
这里的but作介词,常与nothing,nobody,who,all等连用,意为“除……之外”.如:
No one but me saw him.除了我之外,没人看到他.