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【考試?yán)觥縒e 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(dāng)做某事時(shí)……",句意"我們正在游泳時(shí),暴風(fēng)雨突然來(lái)了。"

【考試?yán)觥縄’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(duì)比或相反的情況,句意"我想在大學(xué)學(xué)法律而我的表兄喜歡學(xué)地理。"

2. 考查before的用法。before可意為"在……之前,還沒(méi)來(lái)得及就……"。

【考試?yán)觥?mdash;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(méi)來(lái)得及……就……",句意"——為什么不跟他說(shuō)會(huì)議的事?——我還沒(méi)來(lái)得及說(shuō)一個(gè)字他就沖出了房間。"

3. 考查since的用法。since引導(dǎo)的從句的謂語(yǔ)動(dòng)詞可以是延續(xù)性的動(dòng)詞,又可以是瞬時(shí)動(dòng)詞。一般情況下,從句謂語(yǔ)動(dòng)詞用一般過(guò)去時(shí),而主句的謂語(yǔ)動(dòng)詞用現(xiàn)在完成時(shí)。但在It is +時(shí)間+since從句的句型中,主句多用一般現(xiàn)在時(shí)。

【考試?yán)觥縏he 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(lái)表示"自從……時(shí)候",其主句要用現(xiàn)在完成時(shí)。句意"這本書寫于1946年,自從那時(shí)開(kāi)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?yán)觥?mdash;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(dǎo)時(shí)間狀語(yǔ)從句。句意"——你記得給瑪麗你欠她的錢了嗎?——是的,我一看見(jiàn)她就給了。"

二﹑條件狀語(yǔ)從句。

條件狀語(yǔ)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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