過(guò)去進(jìn)行時(shí)

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　　1) 概念：表示過(guò)去某時(shí)正在進(jìn)行的狀態(tài)或動(dòng)作。

　　2) 過(guò)去進(jìn)行時(shí)的主要用法是描述一件事發(fā)生的背景;一個(gè)長(zhǎng)動(dòng)作發(fā)生的時(shí)候，另一個(gè)短動(dòng)作發(fā)生。

　　3) 常用的時(shí)間狀語(yǔ)

　　this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while

　　My brother fell while he was riding his bicycle and hurt himself.

　　It was raining when they left the station.

　　When I got to the top of the mountain, the sun was shining.

　　典型例題

　　1) Mary ___ a dress when she cut her finger.

　　A. made　 B. is making　 C. was making　 D. makes

　　答案C. 割傷手指是已發(fā)生的事情，應(yīng)用過(guò)去時(shí)。同　時(shí)，when表時(shí)間的同時(shí)性，瑪麗在做衣服時(shí)提供事情發(fā)生的背景，因此用過(guò)去進(jìn)行時(shí)。

　　2) As she ___ the newspaper, Granny ___ asleep.

　　read; was falling　B. was reading; fell　C. was reading; was falling　D. read;fell

　　答案B.句中的as = when, while，意為當(dāng)之時(shí)。描述一件事發(fā)生的背景時(shí)，用過(guò)去進(jìn)行;一個(gè)長(zhǎng)動(dòng)作發(fā)生的時(shí)候，另一個(gè)短動(dòng)作發(fā)生。句意為在她看報(bào)紙時(shí)，奶奶睡著了。句中的 fell ，是系動(dòng)詞，后跟形容詞，如：fall sick。