let alone后接句子 还是名词?（let alone 更不用说）

题目

let alone后接句子 还是名词?（let alone 更不用说）

答案

let alone Not to mention; much less:更不用提；更别说：“Their ancestors had been dirt poor and never saw royalty,let alone hung around with them”(Garrison Keillor) “他们的祖先穷得要命,从来没有见过王...