Unit2 Working the land小课文短语及句子分析(1)课件
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分析：making it ... 是现在分词短语做结果状语。 eg.They __________________(catch) a traffic jam,
thus ________(cause) the delay. 他们遇上交通堵塞，因而迟到了。
(were caught in; causing
•20. prevent/stop/keep sb. from doing… 阻止某人做某事
•21. carry away 带走
重点句子 1. Over the past half century, using chemical
fertilizers has become very common in farming. 2. Recently, however, scientists have been finding
Book4 Unit2小课文 重点短语及长难句分析
重点短语
1. over/ during/ in the last/ past half century 在过去的半个世纪里(用于现在完成时) 2. a way to do/ of doing 一种…样的方式 3. do/ cause damage to... 对...造成损害 4. even more dangerous 甚至更危险的是 5. as well as... 和, 也, 又 6. wash off 清洗掉 7. build up 逐渐加强, 增进, 扩大
6. Some organic farmers prefer planting grass
between crops to prevent wind or water from
carrying away the soil, and then leaving it in the
ground to become a natural fertilizer for the
next year's crop. 分析：此句为复杂的简单句。句中谓语为prefer, 其后跟并列宾语“planting grass ...”“leaving it”；“to prevent ...”“to become ...”为目的 状语。
2. Recently, however, scientists have been finding
that longterm use of these fertilizers can cause
damage to the land and, even more dangerous,
to people's health. 分析：scientists是主语，谓语 have been finding 现在完成进行时,that引导宾语从句，从句中 longterm use of these fertilizers是主语，and 前面 的to the land和to people's health是并列结构。 cause/ do damage to 对...造成损坏
1. Over the past half century, using chemical
fertilizers has become very common in farming. 分析：over/ in/ during the past/ last +一段时间 做时间状语，常用现在完成时。 using chemical fertilizers为动名词短语做主语， 谓语动词用单数。
6. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year's crop.
make a discovery/discoveries 作出发现 discover sb. doing sth. 发觉某人在做某事 discover sb./sth. to be发现某人/物是 turn to在句中的意思是“转向”。此外， 还有“求助于”的意思。
5. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil.
that longterm use of these fertilizers can cause damage to the land and, even more dangerous, to people's health. 3. These chemicals in the food supply build up in people's bodies over time.
•15. keep...free from/ of... 使...免受... •16. use...as... 把...用作... •17. be rich in...=be high in... 富含... •18. every few years 每隔几年 •…
3. These chemicals in the food supply build up in people's bodies over time. 分析：build up 逐渐增强;逐步建立 over time 随着时间的推移
4. With these discoveries, some farmers and many customers are beginning to turn to organic farming. 分析：discovery n. 发现, 发觉
8. over time 随着时间的推移 9. lead to +n./ doing 导致,通向 10. in addition (to+n./ doing) 此外;除...之外 11. be full of... =be filled with... 充满... 12. be beginning to do... 开始做… 13. turn to(介)+n./ doing 转向,求助于 14. focus on... 集中(注意力/精力)于...
4. With these discoveries, some farmers and many customers are beginning to turn to organic farming.
5. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil.
thus ________(cause) the delay. 他们遇上交通堵塞，因而迟到了。
(were caught in; causing
•20. prevent/stop/keep sb. from doing… 阻止某人做某事
•21. carry away 带走
重点句子 1. Over the past half century, using chemical
fertilizers has become very common in farming. 2. Recently, however, scientists have been finding
Book4 Unit2小课文 重点短语及长难句分析
重点短语
1. over/ during/ in the last/ past half century 在过去的半个世纪里(用于现在完成时) 2. a way to do/ of doing 一种…样的方式 3. do/ cause damage to... 对...造成损害 4. even more dangerous 甚至更危险的是 5. as well as... 和, 也, 又 6. wash off 清洗掉 7. build up 逐渐加强, 增进, 扩大
6. Some organic farmers prefer planting grass
between crops to prevent wind or water from
carrying away the soil, and then leaving it in the
ground to become a natural fertilizer for the
next year's crop. 分析：此句为复杂的简单句。句中谓语为prefer, 其后跟并列宾语“planting grass ...”“leaving it”；“to prevent ...”“to become ...”为目的 状语。
2. Recently, however, scientists have been finding
that longterm use of these fertilizers can cause
damage to the land and, even more dangerous,
to people's health. 分析：scientists是主语，谓语 have been finding 现在完成进行时,that引导宾语从句，从句中 longterm use of these fertilizers是主语，and 前面 的to the land和to people's health是并列结构。 cause/ do damage to 对...造成损坏
1. Over the past half century, using chemical
fertilizers has become very common in farming. 分析：over/ in/ during the past/ last +一段时间 做时间状语，常用现在完成时。 using chemical fertilizers为动名词短语做主语， 谓语动词用单数。
6. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year's crop.
make a discovery/discoveries 作出发现 discover sb. doing sth. 发觉某人在做某事 discover sb./sth. to be发现某人/物是 turn to在句中的意思是“转向”。此外， 还有“求助于”的意思。
5. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil.
that longterm use of these fertilizers can cause damage to the land and, even more dangerous, to people's health. 3. These chemicals in the food supply build up in people's bodies over time.
•15. keep...free from/ of... 使...免受... •16. use...as... 把...用作... •17. be rich in...=be high in... 富含... •18. every few years 每隔几年 •…
3. These chemicals in the food supply build up in people's bodies over time. 分析：build up 逐渐增强;逐步建立 over time 随着时间的推移
4. With these discoveries, some farmers and many customers are beginning to turn to organic farming. 分析：discovery n. 发现, 发觉
8. over time 随着时间的推移 9. lead to +n./ doing 导致,通向 10. in addition (to+n./ doing) 此外;除...之外 11. be full of... =be filled with... 充满... 12. be beginning to do... 开始做… 13. turn to(介)+n./ doing 转向,求助于 14. focus on... 集中(注意力/精力)于...
4. With these discoveries, some farmers and many customers are beginning to turn to organic farming.
5. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil.