新概念英语第二册 第七课知识点

Lesson 7 Too late为时太晚
The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamond from South Africa. A few hours earlier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. Two men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, two others opened the parcel. To their surprise, the precious parcel was full of stones and sand!
单词vocabulary：
1.detective n. 侦探，警探
2.airport n. 机场 port 港口，口岸 air 空气
3.expect v. 1）期待，等待 expectation n.
He doesn’t expect his girlfriend’s coming at all.
2）预料，预期，预计
I did not expect the rain.
4.valuable adj. 贵重的；有价值的 value n. 价值
—> a valuable painting; a valuable information
5.parcel n. 包裹
6.diamond n. 钻石
7.steal v. 偷（过去式：stole; 过去分词：stolen）
8.main adj. 主要的
the main reason 主要的原因； the main problem 主要的问题；
the main thing 最重要的事
9.airfield n. 飞机起落的场地
10.guard n. 警戒，守卫 v. 守卫
11.precious adj. 珍贵的
—> precious time 宝贵的时间
12.stone n. 石子
13.sand n. 沙子
知识点language points：
1.过去将来时
would（will 的过去式）＋动词原形
was/ were going somewhere/to do sth.
for example:
He told me that he would go to Beijing next month.
I wouldn’t say that if I knew your story.
I was going to meet my friend when it suddenly rained.
2. 过去进行时： was/ were doing……
3. while 当……的时候 (一般有时间的持续)
for example:
My father was playing computer games while my mother was cooking.
—> 两个同时持续动作
While I was doing my homework, my mom came in and gave me some fruits.
They arrived while we were having dinner.
While we were talking and laughing loudly, the teacher came in.
—> 一个短暂动作发生在一个持续动作中
while 和 when 的辨析：
We were talking and laughing when the teacher came in. —> 处在时间点的动作While we were talking and laughing loudly, the teacher came in. —> 处在时间段的动作
用when或while填空
1. _____ the teacher came in, we were talking.
_____ we were talking, the teacher came in.
2. He was driving along ____ suddenly a woman appeared.
3. ____ Jack was waiting at the door, an old woman called to him.
4. He was reading a book ____ suddenly the telephone rang.
5. ____ it began to rain, they were playing chess.
6. She saw a taxi coming ____ the she was waiting.
7. While Jack _________(look) for customers, he _______(see) an old man.
8. John __________(sleep) when someone_____(steal) his car.
9. He is strong_____ his brother is weak.
10. The children were running to move the bag of rice ______ they heard the s ound of a motorbike.。