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Unit 4 Unforgettable experiences
第二課時學案
Teaching aims and demands :
Some sentence patterns and difficult points of grammar .
Important and difficult points :
Attributive Clauses , the past perfect continuous tense and the present participles .
Teaching Procedures :
Step 1 疑難透析
1. What had he been doing before the earthquake ?
過去完成進行時表示在過去一個時間點以前一直進行的動作; 而現在完成進行時則表示從過去一個時間點開始一直進行的動作。例如:
I had been doing my homework before you came .
I have been doing my homework since I came back home .
注意 完成進行時都是強調動作的延續, 故其中的動詞必須是延續性的。
考查方向 現在與過去進行完成時的辨異。
【典型考題】 2004 北京高考
Three months went by before she knew it . 她還沒有意識到三個月就過去了。
Now that she is out of a job , Lucy __________ going back to school , but she hasn’t decided yet .
A. had considered B. has been considering
C. considered D. is going to consider
【解析】由 she hasn’t decided yet 可知, Lucy 還在考慮這件事情, 故用現在完成進行時, 表示動作還在繼續。
【答案】B。
2. Before she could move , she heard a loud noise .
Before she could think twice , the water was upon her .
本句中，before 意為“還未來得及…就…”， 例如：
The telephone was hung up before I could answer it .
我還未來得及接電話, 電話就掛斷了。
before 還可以表示“… 之后才…”, 例如:
He almost knocked me down before he saw me .他幾乎把我撞倒才看到我。
before 還可用于 It was not long before …結構, 表示“不久以后”。在此句式中, it 表示時間, before 引起時間狀語從句。若從句時態為將來時, 應用現在時表示。例如:
It was not long before the whole country rose up and drove the enemy out of their homeland . 不久以后, 全國人民奮起反抗, 把敵人趕出了他們的國土。
注意 before 用法很多, 在平時的學習中應特別注意。它既可用作連詞又可用作介詞, 應注意不同詞性需要不同形式。
考查方向 before 與其他連詞的意義辨析以及詞義。
【典型考題】 2003 北京高考
He made a mistake , but then he corrected the situation ___________ it got worse .
A. until B. when C. before D. as
【解析】根據句意“在形勢變得糟糕之前糾正錯誤”可知, 答案應為 before 。
【答案】C。
3. who， whom ， that ，which 或 whose 引起的定語從句以及關系詞與普通連詞 and，but 等的用法區別。
who， whom， that， which 或 whose 為引起定語從句的關系代詞，該使用哪一個由其在句中做的成分來決定：who， whom ，that ，which 在從句中作主語、賓語，而whose 在從句中作定語。
定語從句應為句子的一部分，故從句的前面不需要 and， but，so，or 等連詞。而句中若有了這些連詞，則不使用定語從句。這也就是何時使用關系詞，何時使用普通代詞的問題。例如：
He has three sons，and all of them are doctors .
或: He has three sons , all of whom are doctors .
考查方向 是選擇關系詞還是選擇普通代詞, 也就是選擇含有定語從句的復合句還是并列句。
【典型考題】 2004 遼寧高考
The factory produces half a million pairs of shoes every year, 80% __________ are sold abroad.
A. of which B. which of C. of them D. of that
【解析】80% 的前面沒有連詞, 故應用定語從句形式, 排除 C 項; 而 that 不能直接充當介詞的賓語, D 項錯誤; 用 of which 表示從屬關系“其中的”, 引導定語從句。
【答案】A。
4. 分詞做狀語
分詞在句中做狀語, 是一個重要的語法項目, 一定要把握。
若分詞在句中做狀語, 則由句子的主語來決定其形式。若主語與分詞之間為主動關系, 則用現在分詞; 為被動形式, 則用過去分詞; 沒有主動或被動關系, 則用狀語從句或獨立主格作狀語。例如:
A storm broke out suddenly , sweeping away everything .
（a storm 與sweep away 之間為主動關系 ）
Given more time , I will do it better . （I 與give 之間為被動關系）
It being a hot day , they went swimming . （獨立主格）
辨析 分詞做狀語與并列謂語動詞
若幾個動詞之間沒有主次之分, 只有時間先后, 則用作并列謂語, 表示連續的動作, 最后兩個動作之間加連詞; 若動詞之間有主次之分, 則次要動詞用作分詞作狀語, 主要動詞用作謂語, 且分詞前不能加連詞。
考查方向 在具體的語境中, 過去分詞和現在分詞的選擇。
【典型考題】 2004 廣東高考
____________ the program, they have to stay there for another two weeks .
A. Not completing B. Not completed
C. Not having completed D. Having not completed
【解析】現在分詞的完成式表示動作發生在謂語動詞以前, 其否定形式要在分詞的前面加not 。
【答案】C。
Step 2 Exercises
基礎鞏固
1. Do you still remember the chicken farm __________ we visited three months ago ? （2005 北京高考）
A. where B. when C. that D. what
2. __________ in the queue for half an hour , Tom suddenly realized that he had left his wallet at home .（2004北京高考）
A. To wait B. Have waited C. Having waited D. To have waited
3. Scientists say it may be five or six years _________ it is possible to test this medicine on human patients .（2004 福建高考）
A. since B. after C. before D. when
4. There are two buildings , ___________ stands nearly a hundred feet high .（200 4湖北高考）
A. the larger B. the larger of them C. the larger one that D. the larger of which
5. ----Sorry to have interrupted you .Please go on .
----Where was I ?
----You ________ you didn’t like your father’s job. （2004 北京春招）
A. had said B. said C. were saying D. had been saying
6. It is believed that if a book is __________ it will surely _________ the reader .
A. interested; interest B. interesting; be interested
C. interested; be interesting D. interesting; interest
7. The sunlight came in _________ the windows in the roof and lit up the whole room . （2001上海高考）
A. through B. across C. on D. over
8. The Parkers bought a new house but __________will need a lot of work before they can move in .
A. they B. it C. one D. which
9. Don’t be discouraged . __________ things as they are and you will enjoy every day of your life .（2003 上海春招）
A. Taking B. To take C. Take D. Taken
10. On the way home , a good idea suddenly __________ me --- why not buy Mom a gift for her birthday ?
A. struck B. beat C. knocked D. attacked
高分挑戰
單項填空
1. The forest guards often find campfires that have not been _________ completely .（2004 全國II）
A. turned down B. put out C. put away D. turned over
2. _________ with a difficult situation , Arnold decided to ask his boss for advice . （2005北京高考）
A. To face B. Having faced C. Faced D. Facing
3. The crazy fans _________ patiently for two hours , and they would wait till the movie star arrived .（2004 重慶高考）
A. were waiting B. had been waiting C. had waited D. would wait
4.“We can’t go out in this weather ,”said Bob , __________out of the window .　（NMET 2004II）
A. looking B. to look C. looked D. having looked
5. Having been attacked by terrorists , ___________ .（2004 上海高考）
A. doctors came to their rescue B. the tall building collapsed
C. an emergency measure was taken D. warning was given to tourists
Key ; 基礎鞏固 1-5 CCCDC 6-10 DABCA

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