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生詞和短語
★detective n. 偵探
detective story 偵探小說
★airport n. 機場
★airfield n. 飛機起落的場地
port 港口;airport航空港
field 田野;airfield 停機坪
at the airport
on the airfield
★expect v. 期待，等待
except 除……之外
expect/ik'spekt/ v. 期待，等待
I think so.
I expect so.我希望如此[口語]
expect sb.to do sth.期待某人做某事
expect sth.及物動詞：I expect your letter.
I expect you to write back.
wait for sth./wait for sb.不及物動詞
expect:心理上的等待
wait for:動作上的等待
I wait for my mother.
I expect my mother to come back.
★valuable adj. 貴重的
★precious adj. 珍貴的
value n.---valuable adj.有價值的
sth.is valuable/sth.is precious
precious 帶有感情色彩的
precious photo 珍貴的照片
price 價格;priceless adj.-less 表否定;沒有價格的，無價的
valueless adj. 沒有價值，不足道的
worth 值：worthless adj. 無價值的
★parcel n. 包裹
★diamond n. 鉆石
precious stone 寶石
crystal 水晶; jade 玉
diamond ring 鉆石戒指
★steal v. 偷
steal,stole,stolen
steal sth. 偷(某物)
rob sb. 搶(某人)
My wallet was stolen.
I was robbed.
rob the bank
★main adj. 主要的
main building; main street
main sentence; main idea
不與人連用
★guard n. 警戒，守衛(wèi)
life guard 救生員/body guard 保鏢
★stone n. 石子
★sand n. 沙子
本課重點：過去進行時，一般過去時
一般過去時與現(xiàn)在完成時
共同點：動作在過去都做過了。
區(qū)別：過去式只能強調過去的事，和現(xiàn)在沒有任何關系。
I ate a piece of bread.
現(xiàn)在完成時，過去的事情對現(xiàn)在產(chǎn)生的影響。
I have eaten a piece of bread this morning.I'm not hungry.
The clock stopped.陳述事實
The clock has stopped.過去的事實對現(xiàn)在造成影響
It snowed yesterday.
It has snowed yesterday.強調對現(xiàn)在造成影響
First listen and then answer the question.
聽錄音，然后回答以下問題。
Did the detectives save the diamonds?
The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds 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!