用法

1、過去進行時表示過去某段時間內(nèi)持續(xù)進行的動作或者事情。常用的時間狀語this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while

例如：(1)We were watching TV from seven to nine last night.昨天晚上七點到九點的時候我們在看電視。

(2)What was he researching all day last Sunday?上周日他一整天都在研究什么?

(3)My brother fell while he was riding his bicycle and hurt himself.我哥哥騎自行車的時候從車上摔下來，受傷了。

(4)It was raining when they left the station.他們離開車站的時候天正在下雨。

(5)When I got to the top of the mountain, the sun was shining.當(dāng)我到達山頂?shù)臅r候，陽光燦爛。

2.過去進行時可以表示在過去某個時間點發(fā)生的事情。時間點可以用介詞短語、副詞或從句來表示。如：

What was she doing at nine o'clock yesterday?昨天晚上九點她在做什么? (介詞短語表示時間點)

When I saw him he was decorating his room.當(dāng)我看見他的時候他正在裝飾房間。(when從句表示時間點)

3.在復(fù)合句中，如果主要動作和背景動作都是延續(xù)的或同時發(fā)生的，那么主從句的動詞都可用過去進行時。例如：

While he was waiting for the bus, he was reading a newspaper.他邊等車邊看報。(兩個動作都是延續(xù)的)

He was cleaning his car while I was cooking.他擦車時我在做飯。(兩個動作同時進行)

4、表示在過去即將發(fā)生的動作。如：

She asked him whether he was coming back for supper.

5、表示過去的反復(fù)性或習(xí)慣性的動作，常與副詞always,constantly,continually,frequently等連用，常常帶有說話人的某種感情色彩。如：

His mother was always working like that.他目前總是那樣工作。

6.通常不能用于過去進行時的動詞主要有：agree, be, believe, belong, care, forget, hate, have(擁有), hear, know, like, love, mean, mind, notice, own, remember, seem, suppose, understand, want, wish等。

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