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while,as,when 都可解釋為“當(dāng)…時(shí)候”,用來引導(dǎo)時(shí)間狀語從句,但有區(qū)別： 1、while 意為 during the time that“在……期間”,表達(dá)一個(gè)“時(shí)間段”,不能表達(dá)“時(shí)間點(diǎn)”,從句的動(dòng)詞只限于持續(xù)性動(dòng)詞.例如： One day while he was shopping in the supermarket,he saw his ex-wife with a man. 一天,他在超市購物時(shí),他看到了他的前妻和一個(gè)男子在一起. Strike while the iron is hot. 趁熱打鐵. 2、when 意為 at the time that“在…時(shí)”,多指“時(shí)間點(diǎn)”,例如： When he returned from work,his wife was cooking. 他下班回家時(shí),他的妻子正在做飯. 3、as 意為 at the same time that“正當(dāng)……”或“與……同時(shí)”,它兼指“時(shí)間點(diǎn)”和“時(shí)間段”,從句的動(dòng)詞既可是短暫性動(dòng)詞,也可是持續(xù)性動(dòng)詞.例如： The door bell rang as we were having breakfast. 正當(dāng)我們吃飯的時(shí)候,門鈴響了. As the time went on,the weather got worse and worse. 隨著時(shí)間的推移,天氣越來越糟. 歸納： 總的說來,3者的功能區(qū)別大體可作如下描述： while 為主句動(dòng)作的發(fā)生劃定一個(gè)時(shí)間的范圍； as 為主句動(dòng)作的發(fā)生提供一個(gè)伴隨的動(dòng)作； when 為主句動(dòng)作的發(fā)生規(guī)定一個(gè)特定的時(shí)間. |
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