古英語 thaet, that, that から, 原語ゲルマン語*that, that, that から, PIE*tod, 指示代名詞から拡大, PIE*to, 指示代名詞から拡大, 語源的には the, they と同じ.
英語の語源
that
that: [OE] That is a very ancient word, going right back to prehistoric Indo-European *tad (source also of Greek tó ‘the’ and Russian tot’, ta, to ‘that’). Its original function in English was as the neuter form of a demonstrative pronoun. This came to be used as the definite article (modern English the), but as the grammatical gender system began to break down in the early Middle English period, that broke away from the definite article and began to be used as a demonstrative adjective. Its use as a relative pronoun goes back to the Old English period. => the
that (pron.)
Old English t?t, "that, so that, after that," neuter singular demonstrative pronoun ("A Man's a Man for a' that"), relative pronoun ("O thou that hearest prayer"), and
demonstrative adjective ("Look at that caveman go!"), corresponding to masc. se, fem. seo. From Proto-Germanic *that, from PIE *tod-, extended form of demonstrative pronominal base *-to- (see -th (1)). With the breakdown of the grammatical gender system, it came to be used in Middle English and Modern English for all genders. Germanic cognates include Old Saxon that, Old Frisian thet, Middle Dutch, Dutch dat "that," German der, die, das "the."
Generally more specific or emphatic than the, but in some cases they are interchangeable. From c. 1200 opposed to this as indicating something farther off. In adverbial use ("I'm that old"), in reference to something implied or previously said, c. 1200, an abbreviation of the notion of "to that extent," "to that degree." Slang that way "in love" first recorded 1929. That-a-way "in that direction" is recorded from 1839. "Take that!" said while delivering a blow, is recorded from early 15c.
例文
1. A miracle is something that seems impossible but happens anyway.
奇跡は不可能に見えるが、発生した。
映画『メン?イン?ブラック3』 dl>
2.If you wait，all that happens is that you get older.
もしあなたが待っていたら、起こるのは老いていくことだけです。
毎日一言
3.When life gets hard and you want to give up，remember that life is full of ups and downs，and without the downs，the ups would mean nothing.
4.Eventually，you 'll learn to cry that on the inside.
いつの日か、あなたは涙を心に流すことを学ぶことができます。
米ドラマ『破産姉妹』
5.Success is not final，failure is not fatal：it is the courage to continue that counts.--Winston Churchill成功はゴールではなく、失敗も最後ではなく、最も重要なのは前進を続ける勇気である。dd> 毎日一言