郑秀宁教案.doc

Lesson 7 - Too late
一、教学重点
1、时态:过去进行时。
2、词汇:介词的用法。
二、引入话题:
Today we will learn a story about diamonds. 今天的小故事是关于钻石的。But there’s something wrong about them. 但是在这些钻石身上发生了一些不寻常的事。What happened? 到底发生了什么事呢?Let’s listen to the audio and try to understand the main idea of the story.
三、精讲课文
1、Detectives were waiting at the airport all (the) morning.
这里detectives第一次出现,且只是强调“侦探”这类人,所以可以不用冠词。
过去进行时(强调过去某段时间一直在做某事),标志性时间状语all the time/day/morning
wait for sb./sth. at somewhere; at+小地点,in+大地点
2、They were expecting a valuable parcel of diamonds from South Africa.
expect sth.(心理上的期待) = wait for sth. (动作上的期待)。expect sb. to do sth.
注意expect VS except。 valuable 贵重的 VS precious 珍贵的
a parcel of... 一包… diamond(jade,crystal)戴梦得珠宝
3、A few hours earlier, someone had told the police that thieves would try to steal the diamonds.
立足点是侦探们等在机场的时间。主句用的过去完成时,从句用的过去将来时。
someone 不定代词。try to do sth. 试图做某事。
a few hours ago 现在之前,以现在的时间为基点往前推,用于一般过去时。
a few hours earlier 比之前更早,以过去的时间为基点往前推,用于过去完成时。
4、When the plane arrived(分句2), some of the detectives were waiting inside the main building while others were waiting on the airfield(分句1).
主句是过去进行时,分句1是过去进行时,分句2是一般过去时。
while 后常接进行时(持续性动词)。
when 后常接一般时(瞬时性动词),也可接进行时(持续性动词)。
5、While two detectives were keeping guard at the door, two others opened the parcel.
例句:My father is reading newspapers while my mother is cooking.
My father was