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(yáng)光燦爛,。
2. 時(shí)間狀語(yǔ)：at this time yesterday, at that time或以when引導(dǎo)的謂語(yǔ)動(dòng)詞是一般過去時(shí)的時(shí)間狀語(yǔ)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(yǔ)、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(yǔ)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)
