Question

let alone后接句子 还是名词?（let alone 更不用说）

Answer 1

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,从来没有见过王族成员,更不用说和他们在一起了”(加里森·谢勒)

There isn't enought room for us,let alone six dogs and a cat

I haven't decided on the menu yet,let alone bought the food.

I haven't decided where to go,let alone when to leave.