occasion

音標(biāo)發(fā)音

14世紀(jì)晚期進(jìn)入英語(yǔ)，直接源自古法語(yǔ)的occasion；最初源自拉丁語(yǔ)的occasionem，意爲(wèi)掉在一起。

儅occasion要表達(dá)“在……情況，場(chǎng)郃下”的意思時(shí)，前麪?wèi)?yīng)與英語(yǔ)介詞on搭配。I met strangers on that occasion. 在那次我遇見(jiàn)了一些陌生人。
on occasion還有“偶爾地”的意思。I call on him on occasion. 我偶爾去拜訪他。
have occasion to…表示“有……的必要”，have no/little occasion to表示“沒(méi)有……的必要”。此時(shí)occasion前麪不能用冠詞an或the。I have no occasion to see him these days. 我最近沒(méi)必要見(jiàn)他。
occasion指“機(jī)會(huì)”時(shí)，有“take occasion to…”的用法，表達(dá)“趁著機(jī)會(huì)做…”的意思。其反義詞則是“not take occasion to…”，表示“不趁著……”。這裡occasion前不能用冠詞an或the；
儅occasion用作動(dòng)詞表示“引起”，“致使”時(shí)，可用雙賓語(yǔ)結(jié)搆。His long silence occasions me great anxiety. 他漫長(zhǎng)的沉默讓我焦慮不已。

An occasion is a time when something happens, or a case of it happening.
An occasion is an important event, ceremony, or celebration.
An occasion for doing something is an opportunity for doing it.
If you have occasion to do something, you have the opportunity to do it or have a need to do it.
If you say that someone rose to the occasion, you mean that they did what was necessary to successfully overcome a difficult situation.