What?were?Ben,?Jake,?Lucy?and?Lily?doing?on?December?31st,?2011??They?(1)_____(prepare)?their?party.?Lucy?(2)_____(buy)?crisps.?Lily?(3)_____(organize)?the?music.?Ben?and?Jake?(4)_____(fetch)?chairs?and?tables.?(5)_____their?parents _____(help)?them??No,?they?(6)_____(not?help)?them?because?they?(7)_____(sit)?on?the?plane?on?their?way?to?Australia.?
【指點(diǎn)迷津】
一般說(shuō)來(lái)，要表示過(guò)去某個(gè)時(shí)刻或某一時(shí)段正在進(jìn)行的動(dòng)作，我們常用過(guò)去進(jìn)行時(shí)。常和過(guò)去進(jìn)行時(shí)連用的時(shí)間狀語(yǔ)有：then,at this/that time yesterday, at … last night, the whole morning, from … to … last night等。
例如：
I was watching TV at this time yesterday. 昨天這個(gè)時(shí)候我在看電視。
They were doing their homework the whole morning. 整個(gè)上午他們都在做作業(yè)。
可以看出，過(guò)去進(jìn)行時(shí)由“was/were +?動(dòng)詞-ing”構(gòu)成，與現(xiàn)在進(jìn)行時(shí)結(jié)構(gòu)相似，只是現(xiàn)在進(jìn)行時(shí)的am/is/are變成了was/were。由此可以推斷，過(guò)去進(jìn)行時(shí)的句式變化也應(yīng)該與現(xiàn)在進(jìn)行時(shí)的一樣。
例如：
She?was?having?a?meeting?at?that?time.?
→?She?was?not?(wasn’t)?having?a?meeting?at?that?time.?
→?Was?she?having?a?meeting?at?that?time??(Yes,?she?was./No,?she?wasn’t.)
那么，如何區(qū)別并準(zhǔn)確使用過(guò)去進(jìn)行時(shí)和一般過(guò)去時(shí)呢？試比較：
I was typing a letter at seven last night. 昨晚7點(diǎn)我在打一封信。(可能沒打完)?
I typed a letter last night. 我昨晚打了一封信。(已經(jīng)打完)?
通過(guò)以上兩個(gè)例句可以看出，這兩種時(shí)態(tài)雖然都表示過(guò)去發(fā)生的動(dòng)作，但過(guò)去進(jìn)行時(shí)表示在過(guò)去某一特定的時(shí)間點(diǎn)或時(shí)間段正在進(jìn)行的動(dòng)作，而一般過(guò)去時(shí)表示在過(guò)去時(shí)間完成了的動(dòng)作。
Key：
1.?were?preparing???2.?was?buying???????3.?was?organizing?
4.?were?fetching?????5.?Were;?helping????6.?weren’t?helping?
7.?were?sitting
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