★New words and expressions
☆detective n.侦探
detective story 侦探小说
☆airport n.机场
☆airfield n.飞机起落的场地
port 港口：airport：航空港
at the airport
field 田野：airfield：停机坪
on the airfield
☆expect v.期待，等待（重点词）
区分：except 除……之外
I think so.=I expect so.(口语）
expect sb to do sth:期待某人做某事
expect(vt):expect sth
I expect your letter.=I expect you to write.
wait(vi):wait for sth/sb
wait for:动作上的等待
expect：心理上的等待
☆valuable adj.贵重的（重点）
☆precious adj.珍贵的
precious带有感情色彩，是真心喜欢的
如：precious photo 珍贵的照片
如果不谈感情，valuable和precious是一样的。
sth is valuable/precious
price:价格->priceless adj.
-less表示否定：没有价格的，无价的
valueless adj.没有价值，不足道的
worth 值：worthless adj.无价值的
☆diamond n.钻石
precious stone 宝石
crystal 水晶
jade 玉
diamond ring 钻戒
☆steal(stole,stolen) v.偷
在中国，认为在不知道的情况下是“偷”，明目张胆的就是“抢”。
而英语不区分。
我们说“我的钱包被偷了”和“我被偷了”是一个字，而在英语里是两个词。
My wallet was stolen.
I was robbed.
steal sth 偷（某物）；rob sb 抢（某人）
跟地点相连也用rob：rob the bank
☆main adj.主要的
main永远不修饰人，我们可以说main building/street/sentence/idea,但不能说main person
☆guard n.警戒，守卫
life guard 救生员
body guard 保镖
★Text
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 on the airfield.Two men took the parcel off the plane and caried it into the Custom 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!
☆someone had told...
过去完成式，过去以前发生的事情
...that thieves would try to...
would+do:过去将来式，间接方式，转述，站在过去看未来
☆when和while都表示当……的时候，考试时一定选when
while能用when代替，但是when却不一定能用while代替
while+从句，动作一定会延续
when+延续性动作/瞬间动词
when he arrived/died
用过去进行时：
在过去的某一点时间，或者是过去某一动作同时发生的另外一个动作。瞬间动词（如arrive）无进行时态。
同时发生的两个动作
1.一个用一般过去时，另一个用过去进行时。
2.分工的情况，均用过去进行时
When I was doing my homework,my mother was cooking.
表面上是分工：两个动作同时开始，表示同时开始同时结束，延续时间不一致，长一点时间的动作用进行时态，短时间的动作用过去时。
When someone knocked at the door,I was having dinner.
☆two others=two other detectives
☆to one\'s surprise, 让某人惊讶的是
跟人的情绪有关的名词都可以替换
to one\'s joy/excitement
☆be full of...装满
My bag was full of books.
★Special difficulties
vt+adv+宾语(n)
vt+宾语(n/pron)+adv
vi+prep+宾语(n)
宾语的位置和词性取决于施加动作的动词
介词出现，一定要有宾语，所以v+prep+宾语(n)
副词可以省略，v+宾语(n/pron)+adv或v+adv+宾语(n)
是副词还是介词要看动词是及物动词还是不及物动词
vt-adv vi-prep
而判断是不是及物动词就要看平时的积累了
特殊：1.make up...->make(vt)up one\'s mind
语法上可以改为make one\'s mind up,但习惯上不改
2.ask for...
表面上ask（vt），可改。但要注意是ask (sb) for sth 的省略，所以不能改
