let alone和not to mention有什么区别？ let alone 和not to mention有什么区别

let alone\u548cnot to mention\u6709\u4ec0\u4e48\u533a\u522b

\u3000\u3000not to mention\u7684\u540e\u9762\u53ea\u80fd\u63a5\u540d\u8bcd\u77ed\u8bed,
\u3000\u3000\u800clet alone\u540e\u9762\u53ef\u4ee5\u63a5\u4efb\u4f55\u8bcd\u6027\u7684\u8bcd\u9879,\u5e76\u4e14\u5927\u90fd\u7528\u4e8e\u5426\u5b9a\u53e5\u4e4b\u540e\u3002

\u3000\u3000\u8bf7\u8003\u5bdf\u4e0b\u9762\u7684\u4f8b\u53e5:
\u3000\u3000 1. He rejected it for its cost,not to mention its ugliness.(MED) \u4ed6\u56e0\u4e3a\u4ef7\u683c\u9ad8\u800c\u6ca1\u4e70\u5b83,\u66f4\u4e0d\u7528\u8bf4\u5b83\u5f88\u96be\u770b\u4e86\u3002
\u3000\u3000 2. He wrote twenty novels,not to mention six thick volumes of verse.(CGEL) \u4ed6\u5199\u4e86\u4e8c\u5341\u672c\u5c0f\u8bf4,\u66f4\u4e0d\u7528\u8bf4\u516d\u539a\u672c\u8bd7\u96c6\u4e86\u3002
\u3000\u3000 3. We\u2019re too busy to take a long holiday this year,not to mention the fact that we can\u2019tafford it. (ALD) \u6211\u4eec\u592a\u5fd9,\u4eca\u5e74\u4e0d\u80fd\u53bb\u5ea6\u957f\u5047,\u66f4\u4e0d\u5fc5\u8bf4\u6211\u4eec\u62ff\u4e0d\u8d77\u8fd9\u7b14\u8d39\u7528\u4e86\u3002
\u3000\u3000 4. They own two houses,not to mention a boat. (\u300a\u97e6\u6c0f\u8bcd\u5178\u300b,\u7535\u5b50\u7248) \u4ed6\u4eec\u62e5\u6709\u4e24\u680b\u623f\u5b50,\u66f4\u4e0d\u7528\u8bf4\u8fd8\u6709\u4e00\u53ea\u8239\u3002
\u3000\u3000 5. Dave is handsome and smart,not to mention being a good athlete.(DAI)\u6234\u592b\u6f02\u4eae\u800c\u806a\u660e,\u66f4\u4e0d\u7528\u8bf4\u8fd8\u662f\u4e2a\u597d\u8fd0\u52a8\u5458\u3002
\u3000\u3000 6. I had never seen him,let alone spoken to him. (let alone\u8fde\u63a5\u8c13\u8bed\u7684\u4e00\u90e8\u5206spoken,\u5176\u4ed6\u4f8b\u53e5,\u89c1not to say/let alone) \u6211\u4ece\u6765\u6ca1\u89c1\u8fc7\u4ed6,\u66f4\u522b\u8bf4\u4e0e\u4ed6\u4ea4\u8c08\u4e86\u3002
\u3000\u3000 7. She will not help her brother,let alone a stranger. (ELD) \u5979\u8fde\u81ea\u5df1\u7684\u5f1f\u5f1f\u90fd\u4e0d\u613f\u610f\u5e2e\u52a9,\u66f4\u4e0d\u7528\u8bf4\u964c\u751f\u4eba\u4e86\u3002 \u53e6\u5916,let alone\u53ea\u7528\u4e8e\u975e\u6b63\u5f0f\u8bed\u4f53\u3002

let alone\u6307\u7684\u662f\u4e00\u8005\u6ca1\u6cd5\u505a\u5230\u6216\u662f\u4e0d\u53ef\u80fd\uff0c\u5c31\u66f4\u4e0d\u7528\u8bf4\u53e6\u4e00\u8005\u4e86\u3002\u5982He cannot walk, let alone run. \u800c not to mention\u4f1a\u5f3a\u8c03\u51fa\u65b0\u7684\u4fe1\u606f\uff0c\u5982He has two houses here, not to mention his villa(\u522b\u5885) in France.

　　not to mention的后面只能接名词短语,
　　而let alone后面可以接任何词性的词项,并且大都用于否定句之后。

　　请考察下面的例句:
　　 1. He rejected it for its cost,not to mention its ugliness.(MED) 他因为价格高而没买它,更不用说它很难看了。
　　 2. He wrote twenty novels,not to mention six thick volumes of verse.(CGEL) 他写了二十本小说,更不用说六厚本诗集了。
　　 3. We’re too busy to take a long holiday this year,not to mention the fact that we can’tafford it. (ALD) 我们太忙,今年不能去度长假,更不必说我们拿不起这笔费用了。
　　 4. They own two houses,not to mention a boat. (《韦氏词典》,电子版) 他们拥有两栋房子,更不用说还有一只船。
　　 5. Dave is handsome and smart,not to mention being a good athlete.(DAI)戴夫漂亮而聪明,更不用说还是个好运动员。
　　 6. I had never seen him,let alone spoken to him. (let alone连接谓语的一部分spoken,其他例句,见not to say/let alone) 我从来没见过他,更别说与他交谈了。
　　 7. She will not help her brother,let alone a stranger. (ELD) 她连自己的弟弟都不愿意帮助,更不用说陌生人了。 另外,let alone只用于非正式语体。

两者都有“更不用说”的意思，但是let alone还有“不理, 不管〔惹〕, 不烦扰, 不干涉”的意思。

扩展阅读：my stupid heart ... believe it or not ... there is no means that ... let alone understood ... let alone good ones ... not to speak ... let alone后面加to do ... let alone doing ... let alone和not to mention ...