過去進(jìn)行時(shí)

1.概念：表示過去某段時(shí)間或某一時(shí)刻正在發(fā)生或進(jìn)行的行為或動(dòng)作。

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

我兄弟騎車時(shí)摔了下來，受了傷。

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

我到達(dá)山頂時(shí)，陽光燦爛。

2.時(shí)間狀語：at this time yesterday， at that time或以when引導(dǎo)的謂語動(dòng)詞是一般過去時(shí)的時(shí)間狀語等。

3.基本結(jié)構(gòu)：

was/were + doing

否定形式：was/were + not + doing。

一般疑問句：把was或were放于句首。

4.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。

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>

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。

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))

She was doing her homework then。

那個(gè)時(shí)候她正在寫作業(yè)。(副詞表示時(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)。

When 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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