高考英语必考20个句型讲与练9
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句型15
when引导的从句
when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句，还有一种用法值得关注，那就是when高考资源网引导并列分句，意思是“这时突然；就在那时”，强调另一个动作的突然发生。常用于以下句型中：（1）、主语 + be doing… when…意思是“正在做某事这时……”；（2）、主语 + be about to do…when…；（3）、主语+be on the point of (doing) …when…意思是“正要去做某事这时……”21世纪教育网
[例句]
One day Chuck was on a flight across the Pacific Ocean when suddenly his plane crashed. 有一天，Chuck正在太平洋上飞行，这时他的飞机突然爆炸了。
I don’t know when he will arrive. 我不晓得他什么时候到达。
I thought of the happy days when I was in Beijing. 我想起了在北京时的那段快乐日子。
I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会到来。21世纪教育网
I was walking along the river when I heard a drowning boy cry for help. 我正在河边行走，这时我突然听到一个落水男孩求救。
I was about to leave when it began to rain. 我刚要离开，这时下雨了。
I had just finished my exam paper when the bell rang, announcing the class was over. 我刚做完作业，下课铃响了。
I thought of the happy days when I was in France. 我想到了在法国时那段快乐日子。
I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会来临。
[比较]
I was walking along the street when I caught sight of a tailor’s shop. 我正在街上走，这时我看见一家裁缝店。
I was walking along the streets. Just at the moment I caught sight of a tailor’s shop. 我在街上走。就在那时我看见一家裁缝店。21世纪教育网
[高考题回放]
1. He was about to tell me the secret ______ someone patted him on the shoulder.（2002上海）
A. as B. until C. while D. when
2. Don’t be afraid of asking for help ______ it is needed.（2003全国卷）
A. unless B. since C. although D. when
3. We were swimming in the lake ______ suddenly the storm started.（2004北京春季）
A. when B. while C. until D. before
4. Jasmine was holidaying with her family in a wildlife park ______ she was bitten on the leg by a lion.（2004上海）
A. when B. while C. since D. once
5. I was just talking to Margaret when Jackson _____.（2005湖南）
A. cut in B. cut down C. cut out D. cut up
6. He transplanted the little tree to the garden _____ it was the best time for it.（2005上海）
A. where B. when C. that D. until
7. –Did Jack come back early last night 21世纪教育网
–Yes, it was not yet eight o’clock _____ he arrived home.
A. before B. when C. that D. until
8. Most of us know we should cut down on fat, but knowing such things isn’t much help when it _____ shopping and eating.（2006天津）
A. refers to B. speaks of C. focuses on D. comes to
9. He was about halfway through his meal _____ a familiar voice came to his ears.（2006辽宁）
A. why B. where C. when D. while
10. When _____ different cultures, we often pay attention only to differences without noticing the many similarities.（2006浙江）
A. compared B. being compared C. comparing D. having compared
11. I _____ along the street looking for a place to park when the accident _____.（2006安徽）
A. went; was occurring B. went; occurred
C. was going; occurred D. was going; had occurred
12. How can you expect to learn anything _____ you never listen （2006山东）
A. in case B. even if C. unless D. when 21世纪教育网
13. I had just stepped out of the bathroom and was busily drying myself with a towel _____ I heard the steps.（2006湖南）
A. while B. when C. since D. after
14. I was still sleeping when the fire _____, and then it spread quickly.（2006广东）
A. broke out B. put out C. came out D. got out
15. Please remind me _____ he said he was going. I may be in time to see him off. (NMET2006)
A. where B. when C. how D. what
21世纪教育网
[参考答案和提示]
1. D 2. D 3. A 4. A. 5. A 6. B 7. B 8. D 9. C 10. C 11. C 12. D 13. B 14. A 15. B
21世纪教育网 -- 中国最大型、最专业的中小学教育资源门户网站。 版权所有@21世纪教育网
句型15
when引导的从句
when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句，还有一种用法值得关注，那就是when高考资源网引导并列分句，意思是“这时突然；就在那时”，强调另一个动作的突然发生。常用于以下句型中：（1）、主语 + be doing… when…意思是“正在做某事这时……”；（2）、主语 + be about to do…when…；（3）、主语+be on the point of (doing) …when…意思是“正要去做某事这时……”21世纪教育网
[例句]
One day Chuck was on a flight across the Pacific Ocean when suddenly his plane crashed. 有一天，Chuck正在太平洋上飞行，这时他的飞机突然爆炸了。
I don’t know when he will arrive. 我不晓得他什么时候到达。
I thought of the happy days when I was in Beijing. 我想起了在北京时的那段快乐日子。
I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会到来。21世纪教育网
I was walking along the river when I heard a drowning boy cry for help. 我正在河边行走，这时我突然听到一个落水男孩求救。
I was about to leave when it began to rain. 我刚要离开，这时下雨了。
I had just finished my exam paper when the bell rang, announcing the class was over. 我刚做完作业，下课铃响了。
I thought of the happy days when I was in France. 我想到了在法国时那段快乐日子。
I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会来临。
[比较]
I was walking along the street when I caught sight of a tailor’s shop. 我正在街上走，这时我看见一家裁缝店。
I was walking along the streets. Just at the moment I caught sight of a tailor’s shop. 我在街上走。就在那时我看见一家裁缝店。21世纪教育网
[高考题回放]
1. He was about to tell me the secret ______ someone patted him on the shoulder.（2002上海）
A. as B. until C. while D. when
2. Don’t be afraid of asking for help ______ it is needed.（2003全国卷）
A. unless B. since C. although D. when
3. We were swimming in the lake ______ suddenly the storm started.（2004北京春季）
A. when B. while C. until D. before
4. Jasmine was holidaying with her family in a wildlife park ______ she was bitten on the leg by a lion.（2004上海）
A. when B. while C. since D. once
5. I was just talking to Margaret when Jackson _____.（2005湖南）
A. cut in B. cut down C. cut out D. cut up
6. He transplanted the little tree to the garden _____ it was the best time for it.（2005上海）
A. where B. when C. that D. until
7. –Did Jack come back early last night 21世纪教育网
–Yes, it was not yet eight o’clock _____ he arrived home.
A. before B. when C. that D. until
8. Most of us know we should cut down on fat, but knowing such things isn’t much help when it _____ shopping and eating.（2006天津）
A. refers to B. speaks of C. focuses on D. comes to
9. He was about halfway through his meal _____ a familiar voice came to his ears.（2006辽宁）
A. why B. where C. when D. while
10. When _____ different cultures, we often pay attention only to differences without noticing the many similarities.（2006浙江）
A. compared B. being compared C. comparing D. having compared
11. I _____ along the street looking for a place to park when the accident _____.（2006安徽）
A. went; was occurring B. went; occurred
C. was going; occurred D. was going; had occurred
12. How can you expect to learn anything _____ you never listen （2006山东）
A. in case B. even if C. unless D. when 21世纪教育网
13. I had just stepped out of the bathroom and was busily drying myself with a towel _____ I heard the steps.（2006湖南）
A. while B. when C. since D. after
14. I was still sleeping when the fire _____, and then it spread quickly.（2006广东）
A. broke out B. put out C. came out D. got out
15. Please remind me _____ he said he was going. I may be in time to see him off. (NMET2006)
A. where B. when C. how D. what
21世纪教育网
[参考答案和提示]
1. D 2. D 3. A 4. A. 5. A 6. B 7. B 8. D 9. C 10. C 11. C 12. D 13. B 14. A 15. B
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