内容正文:
Period Five Grammar & Writing
语法感知
Ⅰ.课文原句感知
1.Pliny wrote about a terrible volcanic eruption that he (witness) as a young man.
2.However,more than 1,600 years later,some scientists found the lost towns that (bury) under the ashes.
3.Before the eruption occurred,it (be) a booming Roman city.
4.The bodies of people who (die) in Pompeii left impressions in the ash that showed their exact shapes.
5.My computer’s really slow.I need to get the hard disk (upgrade).
6.I think I’ll have the car (service) this week.
7.Next month I’m going to get my bike (repair).
8.I had that broken window (replace) at last.
Ⅱ.完成句子
1. (电影已经开始了) when they arrived at the cinema.
2. (学生们已离开教室了) when the teacher came in.
3.The roads were full of people. (我们没有想到这一点).
4.I always (理发) at Ken’s.
5.I must (找人给我的轮胎充气).
语法精析
Ⅰ.过去完成时
一、构成方法
由“had+动词的过去分词”构成。
二、用法说明
1.表示在过去某一时刻或某一动作之前已经完成了的动作,即“过去的过去”。
She said she had never been to Paris.
她说她从未去过巴黎。
When the police arrived,the thieves had run away.
警察到达时,小偷们早就跑了。
过去完成时是一种相对时态,一定要有一个作参照的过去时间或过去动作作比较,否则,就不能用过去完成时。但下列三种情况虽然有先后发生的两个过去动词,却用一般过去时:
(1)先后发生的一系列动作,但并不强调先后时,最后两个动词用then,and,but等连接,用一般过去时。
On Saturday afternoon,Mrs.Green went to the market,bought some bananas and visited her cousin.
星期六下午,格林夫人去了市场,买了些香蕉,然后去看望了她的表姐。
(2)两个动作是紧接着发生的,可用一般过去时。
When I heard the news,I was very excited.
我听到那个消息时,非常兴奋。
(3)叙述历史事实,用一般过去时。
Our teacher told us that Columbus discovered America in 1492.
我们老师告诉我们哥伦布于1492年发现了美洲。
2.表示从过去某一时刻开始一直延续到另一过去时刻的动作或状态。与现在完成时一样,也常与so long,for three days,before等表示一段时间的状语连用。
When Jack arrived,he learned Mary had been away for almost an hour.
当杰克到来时,他才得知玛丽已经离开差不多一个小时了。
3.表示未曾实现的愿望或打算。表示希望或打算的动词,如hope,want,expect,think,suppose,plan,mean,intend等的过去完成时,后接不定式to do时,表示未曾实现的愿望或打算,即“本来希望或打算做某事(但却没做)”。
I had hoped to send him a Christmas card,b