Leon 7 Too late 为时太晚
本课重点：过去进行时，一般过去时
New words and expreions: 1.detective n.侦探
detective story/novel 侦探小说
detective film 侦探片
After a while he was tired of reading detective stories.过了一会儿，他对看侦探小说也感到厌倦了。
2.airport n.机场
airfield n.飞机起落的场地 port 港口；airport航空港 field 田野；airfield 停机坪
at the airport
on the airfield
The plane circled the airport before landing.飞机着陆以前在机场上空盘旋。
We are to meet him at the airport.我们要到飞机场去接他。
An airfield is a place where aircraft can take off or land.飞机场是飞机可以起飞或降落的地方。
The firm decided to bid on the new airfield.该公司决定投标争取承建新机场。 3.expect:／ik\'spekt/ v.期待，等待 / except 除……之外 expect sb.to do sth.期待某人做某事: I expect you to write back.
We expect him to carry out his promises.我们期待他履行诺言。
We expect you to finish it in time.我们希望你及时把它完成。 expect sb./ sth.及物动词：I expect your letter.
Do not expect me.不要期待我来。 I expect so.我希望如此［口语］/ I think so.expect to do sth.预料，预期，估计，预计
We expect to have a supply this Friday.估计本星期五就会到货。
She expects to fail the exam.她预料无法通过考试。 比较：wait for sth./wait for sb.不及物动词 expect:心理上的等待 wait for:动作上的等待
I am waiting for my mother.
I expect my mother to come back.习惯用语：
as one might expect 正如人们所预料的 be expecting 怀孕了
expect sb.to be 期望某人成为...expect sth.of sb.对...的期望[要求] 4．valuable: adj.(1) 贵重的, 珍贵的, 值钱的, 名贵的，指“由于有价值很值钱而价格高的”
He has a valuable collection of stamps.他收藏了很有价值的邮票。 (2) 宝贵的, 有价值的, 极有用的
This is one of the most valuable leons I learned.这是我所学到的最宝贵的教训。 precious adj.珍贵的，宝贵的, 贵重的, 珍爱的，往往带有感情色彩的
He has sent me most precious gifts.他送给我极其珍贵的礼物。
precious photo 珍贵的照片 adv.〈口〉很, 非常
Precious few people can afford prices like that.没有什么人出得起那个价钱。 pricele adj.无价的, 贵重的, 无法估价的
The findings could be pricele.这些调查结果可能是极为重要的。 valuele adj.没有价值，不足道的 worth 值：worthle adj.无价值的 5.parcel n.包裹/ a parcel of
I want to send this parcel to Hong Kong.我想把这个包裹寄去香港。
John sent a parcel to a friend of his.约翰寄一个包裹给他一个朋友。
She is carrying a parcel of book under her arm.她胳膊下夹著一包书。 6.diamond n.钻石
diamond ring 钻石戒指
five carat diamond 五克拉钻石
Diamond cut diamond.强中更有强中手。
It was diamond cut diamond when the two teams met.那两队一交锋真是棋逢对手，互不相让。
precious stone 宝石 crystal 水晶 jade 玉
7.steal v.偷 steal, stole, stolen steal sth.偷（某物）
He that steals an egg will steal an ox.现在偷只蛋，将来会偷牛。
steal into the room 潜入房间
steal sb.\'s heart 巧妙地博取某人的欢心 rob sb.抢(某人)
My wallet was stolen.
I was robbed.
rob the bank 8.main adj.主要的, 不与人连用
main building; main street
main sentence; main idea
This is the main purpose of my coming here.这就是我到这儿来的主要目的。 9.guard n.(1) 警戒，守卫
Be on your guard against pickpockets.谨防扒手。
The sentry is on guard.那哨兵在担任警戒。
It is better to guard speech than to guard wealth.慎言重于守财。
We think it best to be on guard.我们觉得最好还是保持警锡。 (2) 卫兵
The guard won\'t let anyone through the gate without a pa.卫兵不让任何没有通行证的人通过大门。
life guard 救生员/body guard 保镖 10.stone n.石子，石头，矿石，石料
a heap of stones 一堆石头
Marble is a precious stone.大理石是一种珍贵的石料。
A rolling stone gathers no mo.滚石不生苔，转业不聚财。 11.sand n.沙, 沙子
Mix the sand and cement.将沙和水泥和在一起。
Sand may be carried many miles by the wind.风可以把沙子带几里远。
The boy scooped out a hole in the sand.那个男孩在沙中挖了个洞。 (pl.) 沙滩; 沙洲
Sands are a large area of sand.沙漠就是大面积的沙地。
Notes to the text 1.The plane was late and detectives were waiting at the airport all morning. 过去进行时
1.过去进行时的定义
过去进行时主要表示过去某一时刻正在进行的动作，或表示过去某一阶段一直在进行的动作。如：
I was having a talk with Li Hua at that time.那时，我正在跟李华谈话。
I was watching TV at home last night.昨晚我一直在看电视。 2.过去进行时的结构
过去进行时由“was / were + 现在分词”构成。如：
I was doing my leons then.那时，我在做功课。
We were cleaning the house.我们在打扫房子。 3.使用过去进行时应注意的几点
(1) 过去进行时可表示按计划、安排过去某时刻将要发生的动作。如：
He said they were leaving for Beijing this afternoon.他说他今天下午要去北京。
(2) 动词hope, wonder等的过去进行时常用来表示提出要求，虽然表示现在的内容，但语气比一般现在时或一般过去时要委婉。如：
I was wondering whether you could come to join us.我想你能否过来跟我们一起活动?
(3) 过去进行时中有always, forever, continually, constantly修饰时，表示说话人的赞赏或厌烦的感情。如：
He was always thinking of others.他总是想到人家。 4.过去进行时与一般过去时的区别
(1) 过去进行时强调动作在过去某时刻正在进行或持续，而一般过去时表示动作的完成。如：
He was writing his composition last night.他昨晚在写作文。(不一定写完)
He wrote his composition last night.他昨晚写了一篇作文。(已经写完)
(2) 表示过去的状态、感觉及心理活动的静态动词(如be, like, love, hate, fear, own, hear, see, know, want, notice)可用于一般过去时，但通常不用于进行时。如：
I hated it when a man spoke with his mouth full of food.我讨厌人们说话时口里含着食物。
(3) 一般过去时与always, constantly, forever, continually等连用，表示“过去经常性、习惯性的动作”;而过去进行时与always, constantly, forever, continually等连用，表示动作的重复，常带有感情色彩。如：
He always got up at six.他过去总是六点起床。
He was always thinking of his work.他总是一心想到工作。
(4) 有时过去进行时可以用来替换一般过去时，但一般过去时表示主语的行为是经过认真考虑的;而过去进行时表示一种较随便或没有进行仔细考虑的行为。如：
I thought that he would agree with us.我原以为它会同意我们的。
I was thinking of persuading him to follow my advice.我想到了要说服他接受我们的建议。
