- 從何時更改
- if: If they had only arriv ...
- modify: vt. 變更;修改;減輕,緩和,調節(jié);限制;【哲學】規(guī)定 ...
- since: ★ 1. 主句中動詞用現(xiàn)在完成式時, sin ...
- since: ★ 1. 主句中動詞用現(xiàn)在完成式時, since 所引導的子句須用過去式: We have both changed since we parted. 分別以來彼此都變了。 2. 主句主語為 it, 動詞用現(xiàn)在[過去]式時, since 引導的子從句須用過去[過去完成]時: It is two years since we parted. 我們分別以來有兩年了。 It was two years since we had parted. 那時我們已經(jīng)分別兩年了。 2. 因為,所以,既是。 ★在表示原因的幾個連詞中,語氣最強的詞是 because, 其次是 since, 再其次是 as, for。 because 是直接說明問話 why 的‘理由’、‘原因’。 since 是站在‘時間’立場用‘既是…就…’的意義去說明事件關系中的自然結果的;表達這一理由的 since 通常放在句首,但在省略句中也可放在句中: S- force is no remedy, let us try conciliation. 武力既不中用,就想法和解吧。 That is a useless, since impossible, proposal. 既然不可能,那就是一個沒用的提議。 …以來,以后,…之后,自從。 S- seeing you I have had good news. 見面以后得到(你的)不少好消息。 since midnight 午夜之后(到此時)。 since then 其后,從此一直。 adv. 1.以后,此后,以來。 ★由前置詞慣用短語 since then, since that 略去 then (時), that (事)而形成:I have not seen him since (=since then). (那時)以后沒見過他。 2.(距今幾年)以前;(從那時候起幾年)以前。 ★由 conj. 1. 義轉變成的: It is two years since (we parted).=We parted two years since (=ago). 我們是在兩年以前分別的。 It was two years since (we had parted).=We had parted two years since (=before). 我們是在那以前兩年分別的。 ever since 從那時起,此后一直。 long since 好久以前,已久。 not long since 就在不久,未久。
- since then: 從那時以來; 其后, 從此一直; 自此之后; 自那以后
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