let alone的用法

基本上let alone不用再句首,只用在句中.
给你几个例句.
There isn't enough room for us,let alone six dogs and a cat.
连我们的地方都不够,更不必说六条狗和一支猫了.
I haven't decided on the menu yet,let alone bought the food.
我还没决定吃什么菜呢,更不必说买好了.
I never thought of it,let alone did I do it.
我想都没有想到它,更谈不上去做了.
He hasn't enough money for food,let alone amusements.
他连温饱都无法解决,就更不用说娱乐了.
The baby can't even walk,let alone run.
这小孩连走路都不会,更不用说跑了.
希望可以帮上你