用法：
1.過去進(jìn)行時(shí)表示過去某段時(shí)間內(nèi)持續(xù)進(jìn)行的動(dòng)作或者事情。常用的時(shí)間狀語this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while例如：
We were watching TV from seven to nine last night.昨天晚上七點(diǎn)到九點(diǎn)的時(shí)候我們?cè)诳措娨暋?/p>
What was he researching all day last Sunday?上周日他一整天都在研究什么?
My brother fell while he was riding his bicycle and hurt himself.我哥哥騎自行車的時(shí)候從車上摔下來，受傷了。
It was raining when they left the station.他們離開車站的時(shí)候天正在下雨。
When I got to the top of the mountain, the sun was shining.當(dāng)我到達(dá)山頂?shù)臅r(shí)候，陽光燦爛。
2.過去進(jìn)行時(shí)可以表示在過去某個(gè)時(shí)間點(diǎn)發(fā)生的事情。時(shí)間點(diǎn)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(diǎn)她在做什么?(介詞短語表示時(shí)間點(diǎn))
When I saw him he was decorating his room.當(dāng)我看見他的時(shí)候他正在裝飾房間。(when從句表示時(shí)間點(diǎn))
3.在復(fù)合句中，如果主要?jiǎng)幼骱捅尘皠?dòng)作都是延續(xù)的或同時(shí)發(fā)生的，那么主從句的動(dòng)詞都可用過去進(jìn)行時(shí)。例如：
While he was waiting for the bus, he was reading a newspaper.他邊等車邊看報(bào)。(兩個(gè)動(dòng)作都是延續(xù)的)
He was cleaning his car while I was cooking.他擦車時(shí)我在做飯。(兩個(gè)動(dòng)作同時(shí)進(jìn)行)
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