if: [OE] The Old English version of if was gif, but its initial g was closer to modern English y in pronunciation than to g, and the conjunction gradually evolved through Middle English yif to if. It is not known where it ultimately came from; it is evidently connected with Old High German iba ‘condition’ and Old Norse ef ‘doubt’, but whether it started life as a noun like these or was from the beginning a conjunction is not clear. Its surviving Germanic relatives are German ob ‘whether’ and Dutch of ‘if’.
if (conj.)
Old English gif (initial g- in Old English pronounced with a sound close to Modern English -y-), from Proto-Germanic *ja-ba (cognates: Old Saxon, Old Norse ef, Old Frisian gef, Old High German ibu, German ob, Dutch of "if, whether"), from PIE pronominal stem *i- [Watkins]; Klein, OED suggest probably originally from an oblique case of a noun meaning "doubt" (compare Old High German iba "condition, stipulation, doubt," Old Norse if "doubt, hesitation," Swedish j?f "exception, challenge"). As a noun from 1510s.
例文
1. If you wait，all that happens is that you get older.
もしあなたが待っていたら、起こるのは年を取ることだけです。
毎日一言
2. If you love life,life will love you back.
生活を愛し、生活もあなたを愛します。
毎日一言
3. If you 're not satisfied with the life you 're living，don 't just complain.Do something about it.
現状に対する不満は、ただ文句を言うだけではなく、勇気を持って変えなければならない。
毎日一言
4. If you 're lonely when you 're alone，you 're in bad company.--Jean Paul Sartre
もしあなたが一人でいるときに寂しさを感じたら、自分をうまく付き合わなかったことを意味します。
毎日一言
5.Friendship means understanding，not agreement.It means forgiveness，not forgetting.It means the memories last，even if contact is lost.