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高一英語學(xué)習(xí):三四單元重難點(diǎn)句型歸納二
3. Before she could move,she heard a loud noise. 她還沒有來得及動(dòng)彈,就聽見很響的聲音。
However, before she could think twice, the water was upon her. 但還沒有回過身來,洪水便逼近了她。
該兩句中的before用作連詞,后接時(shí)間狀語從句。before用作連詞,接時(shí)間狀語從句時(shí),表示“在……之前”。但在不同的語境中,往往有比較靈活的譯法。例如: He knocked me down before he saw me. 他差一點(diǎn)把我撞倒,才看到我。
【考例】(2005廣東) The American Civil War lasted four years the North won in the end.
A. after B. before C. when D. then
[考查目標(biāo)] 時(shí)間狀語從句的引導(dǎo)詞選擇。
[答案與解析]B before 表示“直到……”。
4. Tree after tree went down, cut down by the water, which must have been three meters deep. 洪水想必深達(dá)三米,樹一棵接一棵地倒了,被洪水沖斷了。
該句中的must have been表示推測。例如:You look so tired. You must have stayed up last night.
情態(tài)動(dòng)詞may,might,most.can,could常用來表示推測。may,might,must多用在肯定句中,can,could多用在否定句和疑問句中。may,might,must,can,could后接動(dòng)詞原形表示對(duì)現(xiàn)在的推測;may,might,must,can,could后接have done。表示對(duì)過去的推測。例如:
You may be a professor. / She must have met a fairy.
【考例】(2005遼寧)This cake is very sweet. You ____ a lot of sugar in it.
A. should put B. could have put
C. might put D. must have put
[考查目標(biāo)] 情態(tài)動(dòng)詞表示推測。
[答案與解析] D 前文說蛋糕很甜,由此可知一定是糖
放多了。對(duì)于過去的動(dòng)作的推測應(yīng)使用have done的
結(jié)構(gòu),所以應(yīng)在B、D之間做選擇,又因?yàn)閏ould have
done表示本可以做而沒有做,所以選擇D。
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