oughtとは意味・読み方・使い方

発音

• (英国用法) IPA^(key): /ɔːt/
• Rhymes: -ɔːt
• (米国用法) IPA^(key): /ɔt/
• (cot–caught merger) IPA^(key): /ɑt/
• Homophone: aught

動詞

ought

1. (obsolete) simple past tense of owe
   • 1526, [William Tyndale, transl.], The Newe Testamẽt […] (Tyndale Bible), [Worms, Germany: Peter Schöffer], OCLC 762018299, Luke vij:[41], folio lxxxvj, recto:

     There was a certayne lender / which had two detters / the one ought five hondred pence / and the other fifty.

   • 1603, Michel de Montaigne, “Of Friendship”, in John Florio, transl., The Essayes […], book I, London: […] Val[entine] Simmes for Edward Blount […], OCLC 946730821, page 90:

     […] witneſſe Ariſtippus, who being vrged with the affection he ought his children, as proceeding from his loynes, began to ſpeake and ſpit […].

動詞

ought

1. (auxiliary) Indicating duty or obligation.

   I ought to vote in the coming election.

2. (auxiliary) Indicating advisability or prudence.

   You ought to stand back from the edge of the platform.

3. (auxiliary) Indicating desirability.

   He ought to read the book; it was very good.

4. (auxiliary) Indicating likelihood or probability.

   We ought to arrive by noon if we take the motorway.

   • 1913, Joseph C. Lincoln, chapter 3, in Mr. Pratt's Patients:

     My hopes wa'n't disappointed. I never saw clams thicker than they was along them inshore flats. I filled my dreener in no time, and then it come to me that 'twouldn't be a bad idee to get a lot more, take 'em with me to Wellmouth, and peddle 'em out. Clams was fairly scarce over that side of the bay and ought to fetch a fair price.

使用する際の注意点

• Ought is an auxiliary verb; it takes a following verb as its complement. This following verb may appear either as a full infinitive (such as “to go”) or a bare infinitive (such as simple “go”), depending on region and speaker; the same range of meanings is possible in either case. Additionally, it's possible for ought not to take any complement, in which case a verb complement is implied, as in, “You really ought to [do so].”
• The negative of ought is either ought not (to) or oughtn't (to) (yet oughtn't've: oughtn't *(to) have)

同意語

• should (In all senses)
• be supposed to

参考

• ought to
• Appendix:English modal verbs
• Appendix:English tag questions

代名詞

ought

1. Alternative spelling of aught; anything
   • 1658, Joseph Hall, The Devout Soul, Or, Rules of Heavenly Devotion Also the Free Prisoner, Or, the Comfort of Restraint

     Is it a small benefit, that I am placed there […] where I see no drunken comessations, no rebellious routs, no violent oppressions, no obscene rejoicings, nor ought else that might either vex or affright my soul?

副詞

ought (not comparable)

1. Alternative spelling of aught; at all, to any degree.

名詞

ought (複数形 oughts)

1. A statement of what ought to be the case as contrasted with what is the case.
   • 1996, Mortimer Jerome Adler, The Time of Our Lives: The Ethics of Common Sense‎^[1]:

     There are value judgments that are not reducible to observable matters of fact, and there are oughts that cannot be construed as hypothetical and, therefore, cannot be converted into statements of fact.

   • 2004, Jacques Maritain, John G. Trapani, Truth Matters: Essays in Honor of Jacques Maritain‎^[2]:

     Is there a fallacy involved in deriving an ought from a set of exclusively factual or descriptive premises?

参考

• aught
• naught
• nought

参照

• “ought” in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• ought at OneLook Dictionary Search.

名詞

ought (複数形 oughts)

1. Alternative spelling of aught; cipher, zero, nought.
   • 1838 March – 1839 October, Charles Dickens, “Nicholas and His Uncle (to Secure the Fortune Without Loss of Time) Wait upon Mr. Wackford Squeers, the Yorkshire Schoolmaster”, in The Life and Adventures of Nicholas Nickleby, London: Chapman and Hall, […], published 1839, OCLC 1057107260, page 24:

     I go back at eight o'clock to-morrow morning, and have got only three—three oughts an ought—three twos six—sixty pound.