if

英 [ɪf] 美[ɪf]

近义词provided

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复数: ifs;

if 如果

来自PIE*i,那个，那里，它，词源同id,idem,yonder.用作连词指如果。

if: 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 jäf "exception, challenge"). As a noun from 1510s.

3. If you're not satisfied with the life you're living, don't just complain. Do something about it.: 对于现况的不满，不能只是抱怨，要有勇气作出改变。

4. If you're lonely when you're alone, you're in bad company.--Jean Paul Sartre: 如果你独处时感到寂寞，说明没有把自己陪好。

5. Friendship means understanding, not agreement. It means forgiveness, not forgetting.It means the memories last, even if contact is lost.: 友情是理解，不是妥协；是原谅，不是遗忘。即使不联系，感情依然在。