用法

一、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。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

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�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(lái)，受傷了。It was raining when they left the station.他們離開(kāi)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(yáng)光燦爛。

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