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【考試例析】We were swimming in the lake _____ suddenly the storm started.
A. when B. while C. until D. before
中公教育解析:選A。was / were doing ... when ....,表示"正當做某事時……",句意"我們正在游泳時,暴風雨突然來了。"
【考試例析】I’d like to study law at university ________ my cousin prefers geography.(四川2007)A. though B. as C. while D. for
中公教育解析:選C。while意為"而,卻",表示對比或相反的情況,句意"我想在大學學法律而我的表兄喜歡學地理。"
2. 考查before的用法。before可意為"在……之前,還沒來得及就……"。
【考試例析】—Why didn’t you tell him about the meeting?—He rushed out of the room _______ I could say a word.
A. before B. until C. when D. after
中公教育解析:選A。before意為"還沒來得及……就……",句意"——為什么不跟他說會議的事?——我還沒來得及說一個字他就沖出了房間。"
3. 考查since的用法。since引導的從句的謂語動詞可以是延續(xù)性的動詞,又可以是瞬時動詞。一般情況下,從句謂語動詞用一般過去時,而主句的謂語動詞用現(xiàn)在完成時。但在It is +時間+since從句的句型中,主句多用一般現(xiàn)在時。
【考試例析】The book was written in 1946, ______ the education system has witnessed great changes.
A. when B. during which C. since then D. since when
中公教育解析:選D。since when= since 1946, 此處用since來表示"自從……時候",其主句要用現(xiàn)在完成時。句意"這本書寫于1946年,自從那時開始教育體系發(fā)生了很大的變化。"
4. 考查"一……就……"的從屬連詞。這些詞包括:as soon as, the moment, the minute, the second, the instant, immediately, directly, instantly等。
【考試例析】—Did you remember to give Mary the money you owed her?
—Yes , I gave it to her ____ I saw her.
A. while B. the moment C. suddenly D. once
中公教育解析:選B。the moment 意為"一……就……",引導時間狀語從句。句意"——你記得給瑪麗你欠她的錢了嗎?——是的,我一看見她就給了。"
二﹑條件狀語從句。
條件狀語從句的從屬連詞有if ,unless(=if ... not),as / so long as , sup-posing(that),provided / providing(that),in case, on condition that等。
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