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一、 概念和用法：過(guò)去進(jìn)行時(shí)

表示在過(guò)去某一時(shí)刻或某一段時(shí)間內(nèi)進(jìn)行或發(fā)生的動(dòng)作。其形式為was /were + V-ing。常與表示過(guò)去的時(shí)間狀語(yǔ)連用，如：last night,last Saturday等；或者與when,while,as引導(dǎo)的過(guò)去時(shí)間狀語(yǔ)連用。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?。What was he researching all day last Sunday? 上周日他一整天都在研究什么？

二、 過(guò)去進(jìn)行時(shí)可以表示在過(guò)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(yǔ)、副詞或從句來(lái)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(yǔ)表示時(shí)間點(diǎn)） When I saw him he was decorating his room. 當(dāng)我看見(jiàn)他的時(shí)候他正在裝飾房間。（when從句表示時(shí)間點(diǎn)）

三、 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(guò)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）

四、 通常不能用于過(guò)去進(jìn)行時(shí)的動(dòng)詞主要有：agree,is,am,are,believe,belong,care,forget,hate,have（擁有），hear,know,like,love,mean,mind,notice,own,remember,seem,suppose,understand,want,wish等。

例如：誤：I was knowing the answer.

正：I knew the answer. 我知道答案。

誤：I wasn‘t understanding him.

正：I didn‘t understand him. 我不明白他的意思。

1. 過(guò)去進(jìn)行時(shí)由“主語(yǔ)+was/were + 動(dòng)詞ing”構(gòu)成

EX： We were having supper when the phone rang. 我們正在吃晚飯時(shí)電話響了。

2. 過(guò)去進(jìn)行時(shí)的否定式由“主語(yǔ)+was/were not +現(xiàn)在分詞”構(gòu)成

EX： This time yesterday Jack was not watching TV. He was repairing his bike.

昨天這個(gè)時(shí)候，杰克不是在看電視，而是在修理自行車。

3. 過(guò)去進(jìn)行時(shí)的疑問(wèn)式由“was/were +主語(yǔ)+ 現(xiàn)在分詞”組成

EX： Were you playing basketball at four yesterday afternoon? 昨天下午四點(diǎn)你們?cè)诖蚧@球嗎？