《2025年情景导学高中英语选择性必修第四册外研版》

4. Some people have experienced damage to their properties whilst renting out their homes, and others have found themselves victims of theft or attack while sharing rides. 有些人出租房屋时财物遭到破坏,还有人搭顺风车时成为盗窃甚至袭击的受害者。
名师点拨
whilst renting out their homes 与 while sharing rides 都是状语从句的省略,都省略了主语和 be 动词。
读句入境
Some poisonous mushrooms, if (they are) consumed mistakenly, can be deadly. 误食某些毒蘑菇可能致命。
Unless (you are) asked to speak, you should remain silent at the meeting. 除非被要求发言,否则你应当在会上保持沉默。
归纳小结
在由 if, as if, unless, although, whilst, when, while 等引导的状语从句中,若从句的谓语含有be动词,且从句的主语与主句的主语一致或从句的主语是 it 时,从句的主语和 be 动词通常可以省略。
高考链接
单句语法填空
The engineers are also trying to develop an on - and - off “switch” where the glow would fade when exposed (expose) to daylight.

答案： be动词; exposed

Ⅰ. 根据汉语提示写单词
1. Doing housework and other tasks can give people higher self - belief, and enable them to better deal with frustration (沮丧).
2. It's a great opportunity to learn more about fitness through the clear instruction and supervision (监督) of a fitness coach.
3. I typically spend only a couple of dollars on a dozen books, so although I read a lot, books aren't my major expense (花费).
4. Police are investigating the theft (偷窃) of computers from the company's offices.
5. She is still grateful to the railway staff and the person who found her purse (钱包).
6. Regular exercise strengthens the heart, thereby (因此) reducing the risk of heart disease.
7. David decided to hire (租用) a second - hand car from a garage so that he could get about.
8. Children are usually told to share toys, snacks, books, happy memories, and sometimes even sorrows (令人悲伤的事) with others.
9. The abuse (滥用) of fertilizer is one of the causes of environmental pollution.

答案： 1. frustration 2. supervision 3. expense 4. theft 5. purse 6. thereby 7. hire 8. sorrows 9. abuse

Ⅱ. 单句语法填空
1. The young chairwoman usually hires expensive (expense) designer clothes for official occasions.
2. Not limited by just two strings, the erhu is capable of presenting both soft, lovely tunes, and grave, sorrowful (sorrow) music.
3. Even when times got tough and frustrating (frustrate), he never let his opponent get the better of him.
4. The organisation does a further favour for some patients by helping them make a lifestyle change.
5. When walking (walk) down the street, she came across her former consultant, who/whom she hadn't seen for three years.
6. On second thoughts, she decided to rent out a room to increase her income.
7. What is in no doubt is that the sharing economy is taking off in all sorts of areas.
8. For security reasons, toddlers should be supervised (supervise) closely by adults at all times.
9. A squeeze of fresh lemon juice on the bananas will prevent them turning (turn) brown.
10. The cosmetics enterprise received a positive response to its products from consumers.

答案： 1. expensive 2. sorrowful 3. frustrating 4. a 5. walking; who/whom 6. out 7. off 8. be supervised 9. turning 10. to