let alone ...とは 意味・読み方・使い方

接続詞

let alone

1. (idiomatic, chiefly in the negative) Much less; to say nothing of; used after one negative clause to introduce another, usually broader and more important clause, whose negation is implied by the negation of the first. However either of these instances mentioned can be applied with the use of let alone.

   He couldn't boil water, let alone prepare a dinner for eight.

   • 1953 December, Cecil J. Allen, “British Locomotive Performance and Performance”, in Railway Magazine, page 838:

     My last run this month is an amazing performance of an "A2/3" Pacific, No. 60524, Herringbone (could there possibly be a more infelicitous name for a locomotive than this, let alone for the unhappy horse which first had to bear it?), […] .

2. (idiomatic, chiefly in the positive, rare) Not to mention, as well as; used after one item, to introduce a further item which is entailed by the first.
   • 1957 July, Cecil J. Allen, “British Locomotive Performance and Performance during Sixty Years”, in Railway Magazine, page 496:

     At the end of another ten years, let alone sixty, we are likely to see a very different pattern in the realm of British passenger locomotive power.

使用する際の注意点

• Sometimes used with the order of items reversed.

参考

• a fortiori

参照

• Charles J. Fillmore, Paul Kay, Catherine O'Connor (September 1988) "Regularity and idiomaticity in grammatical constructions: The case of let alone" Language (Vol.64 No.3) pp.501-538
• Mark Liberman (24 February 2011) "Much less/Or even" Language Log
• E. Ward Gilman (editor) Merriam–Webster's Dictionary of English Usage p.596, Merriam–Webster, 1994 →ISBN.

動詞

let alone (third-person singular simple present lets alone, present participle letting alone, simple past and past participle let alone)

1. (transitive) To leave alone, let be; to stop bothering.

   Synonym: leave alone

   I wish he would let me alone so I could get some sleep.

2. (transitive, colloquial, dated) To rely on (a person) to do something.
   • 1838, Marguerite Countess of Blessington, The Works of Lady Blessington (page 223)

     Oh! let him alone for that. He's the boy that can get out of a scrape.

   • 1849, William Carleton, Tales and Sketches, page 81:

     "It's not easy gettin' as good," rejoined the old woman, "an' you ought to be very glad to win him, if you can."
     "Let me alone for that," said Sally.

派生語

• let it alone