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語(yǔ)法難點(diǎn)
過(guò)去進(jìn)行時(shí)
1.過(guò)去進(jìn)行時(shí)的構(gòu)成
過(guò)去進(jìn)行時(shí)有“was/were+動(dòng)詞-ing”形式構(gòu)成。以動(dòng)詞work為例，其肯定式、否定式、疑問(wèn)式以及簡(jiǎn)略答語(yǔ)見下表：
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肯定式
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否定式
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I/He/She/It was working.
We/You/They were working.
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I/He/She/It was not working.
We/You/They were not working.
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疑問(wèn)句
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簡(jiǎn)略答語(yǔ)
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Was I working?
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Yes, you were. No, you were not
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Were you working?
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Yes, I was. No, I was not
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Was she/he/it working?
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Yes, she/he/it
was No, she/he/it was not
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Were you/we/they working?
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Yes, we/you/they were
No, we/you/they were not
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【注意】was not?？s寫為wasn’t；were not?？s寫為weren’t.
2過(guò)去進(jìn)行時(shí)的用法
過(guò)去進(jìn)行時(shí)表示過(guò)去某一時(shí)刻或某一段時(shí)間正在進(jìn)行的動(dòng)作。這一特定的過(guò)去時(shí)間，除有上下文暗示以外，一般用時(shí)間狀語(yǔ)表示。
—What were
you doing this time yesterday.你們昨天在這個(gè)時(shí)間做什么？
—We were having a class.我們?cè)谏险n。
狀語(yǔ)從句
本單元我們接觸了when和while引導(dǎo)的時(shí)間狀語(yǔ)從句，時(shí)間狀語(yǔ)從句的引導(dǎo)詞有很多，常見的有：
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引導(dǎo)詞
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例句
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when當(dāng)......的時(shí)候
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The army was
disbanded when the war came to an end.
戰(zhàn)爭(zhēng)結(jié)束時(shí)，軍隊(duì)即被解散
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while在.....期間
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I lived in a
hostel while I was a student.
我求學(xué)期間住在招待所里
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before在.....之前
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I wiped my shoes
on the mat before I came in.
我在進(jìn)門前把鞋子在墊子上擦了擦。
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after在...........之后
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I found your
coat after you left the house.
你離開房子之后，我發(fā)現(xiàn)了你的外衣。
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as當(dāng)........的時(shí)候
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He smiled as he
passed.
他路過(guò)時(shí)笑了笑。
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since自從
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Since his wife
died,he’s just let himself go.
自從妻子死后，他就變得不修邊幅了。
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until直到......
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Let’s wait until
the rain stops.
咱們等雨停了吧。
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【注意】since引導(dǎo)的從句多用一般過(guò)去時(shí)，主句用現(xiàn)在完成時(shí)。如：
She has
worked in the factory since graduated from the university.
她大學(xué)畢業(yè)以后就一直在那一家工廠工作。
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