1. While people in other countries in the world were trying to catch wild animals and birds and were still collecting seeds and nuts, farmers in China were developing the science of agriculture. 當別的國家的人們還在努力捕獵禽獸、采集果實時，中國的農民就已經在從事農業研究了。

　　了解引導時間從句的三個引導詞 when, while, as 的區別: while 的含義是during the time that 表示時間段或過程，強調主句與從句的行為或狀態同時發生或存在，從句的謂語動詞必須是延續性的。如：While I was reading, the telephone rang. 我正看書時電話響了。when 的含義是at or during that time, 既可以用于指時間一點(從句謂語需用終止性動詞),也可用于指時間段(從句謂語需用延續性動詞)。如：When the firefighters arrived, we had already put out the big fire. 當救火隊員到來時，我們已經把大火撲滅了(前后兩個動作不同時發生)。When I woke up, Mum was preparing breakfast. 當我醒來時，媽媽正在準備早餐。as 側重的是主句和從句中的行為同時發生，通常譯為隨著...或一邊...一邊...。如: As you grow, you know more and more. 隨著年齡的增長，你的知識越來越豐富。

　　2. He advised farmers to choose the best seed-heads, the ones that had the best colour. 他建議農民挑選最好的谷穗，即那些顏色最好的谷穗。

　　the ones在本句中是同位語，后接定語從句。如：He offered me some books, the ones that are both interesting and instructive. 他提供給我一些書籍，既有趣又有教育意義。My mother advises me to make good friends, the ones that can help each other. 我母親建議我交好朋友，也就是能互相幫助的朋友。

　　　1. Whats the weather going to be like at the weekend? 周末的天氣怎樣？問天氣也可用How is the weather going to be?

　　2. Then he returned home and spent his time on research into agriculture. 然后他回到家鄉，把時間用在農業研究上。research into對進行研究：The doctor carried out a research into healthy food. 這位大夫對健康食品進行了研究。

　　3. He collected information, studied it, did experiments and learnt from the experiences of farmers. 他收集、研究資料，進行實驗，并學習農民的經驗。experience 有兩個意思：①經歷(可數)：He told us about his experiences in Africa. 他給我們講述了他在非洲的經歷。②經驗(通常不可數)：Have you got much experience in/of teaching? 你教學經驗豐富嗎？

　　4. Then he said that they should be hung up to dry. 他說這些谷穗應掛起來晾干。掌握hang的用法：①懸掛(hung; hung): She hung her wet clothes out on the line. 她把濕衣服晾在繩子上。The trees were thickly hung with fruit. 樹上果實累累。②吊死(hanged; hanged): He was hanged for murder. 他因謀殺而被絞死。

　　5. In the following spring, the seeds should be knocked out of the seed-heads and sown. 第二年春天，種子應該從谷穗上敲打下來，然后播種。形容詞following 緊接著、下一個: It rained on the day we arrived, but the following day was sunny. 我們到達的那天正下雨，但次日天氣晴朗。

　　6. He studied how to improve soil conditions. 他還研究了怎樣改造土壤狀況。condition 作單數的時候，表示人或物所處的具體狀態，這時候它的意義相當于state.如：The doctor said that the patient was in good condition. 醫生說病人狀況不錯。用作復數時，指一般情況，偏重于環境。如：They were interested in living conditions in Canada. 他們對加拿大的居住環境感興趣。

　　7. Here are five pieces of advice collected from Jia Sixies book Qi Min Yao Shu: 這是從賈思勰的《齊民要術》一書收集到的五條建議：這是倒裝句。又：Here are some examples. 這里有一些例子。Heres your watch. 這是你的手表。但主語是代詞不倒裝：Here they are. 再提醒：不能說advices或an advice，應說 some advice 或 a piece of advice。

　　8. But if you plant rice in a field one year and wheat in the field the next year, you will harvest good crops. 但如果你頭一年在這塊地里種水稻，第二年則在這塊地里種小麥，就會獲得好收成。掌握harvest的用法：①名詞：gather in the harvest of corn 收獲玉米；have another good harvest 又有一個好收成 ②動詞：The farmers are out harvesting the corn. 農民們在外收割莊稼。

　　1. While people in other countries in the world were trying to catch wild animals and birds and were still collecting seeds and nuts, farmers in China were developing the science of agriculture. 當別的國家的人們還在努力捕獵禽獸、采集果實時，中國的農民就已經在從事農業研究了。

　　了解引導時間從句的三個引導詞 when, while, as 的區別: while 的含義是during the time that 表示時間段或過程，強調主句與從句的行為或狀態同時發生或存在，從句的謂語動詞必須是延續性的。如：While I was reading, the telephone rang. 我正看書時電話響了。when 的含義是at or during that time, 既可以用于指時間一點(從句謂語需用終止性動詞),也可用于指時間段(從句謂語需用延續性動詞)。如：When the firefighters arrived, we had already put out the big fire. 當救火隊員到來時，我們已經把大火撲滅了(前后兩個動作不同時發生)。When I woke up, Mum was preparing breakfast. 當我醒來時，媽媽正在準備早餐。as 側重的是主句和從句中的行為同時發生，通常譯為隨著...或一邊...一邊...。如: As you grow, you know more and more. 隨著年齡的增長，你的知識越來越豐富。

　　2. He advised farmers to choose the best seed-heads, the ones that had the best colour. 他建議農民挑選最好的谷穗，即那些顏色最好的谷穗。

　　the ones在本句中是同位語，后接定語從句。如：He offered me some books, the ones that are both interesting and instructive. 他提供給我一些書籍，既有趣又有教育意義。My mother advises me to make good friends, the ones that can help each other. 我母親建議我交好朋友，也就是能互相幫助的朋友。

　　　1. Whats the weather going to be like at the weekend? 周末的天氣怎樣？問天氣也可用How is the weather going to be?

　　2. Then he returned home and spent his time on research into agriculture. 然后他回到家鄉，把時間用在農業研究上。research into對進行研究：The doctor carried out a research into healthy food. 這位大夫對健康食品進行了研究。

　　3. He collected information, studied it, did experiments and learnt from the experiences of farmers. 他收集、研究資料，進行實驗，并學習農民的經驗。experience 有兩個意思：①經歷(可數)：He told us about his experiences in Africa. 他給我們講述了他在非洲的經歷。②經驗(通常不可數)：Have you got much experience in/of teaching? 你教學經驗豐富嗎？

　　4. Then he said that they should be hung up to dry. 他說這些谷穗應掛起來晾干。掌握hang的用法：①懸掛(hung; hung): She hung her wet clothes out on the line. 她把濕衣服晾在繩子上。The trees were thickly hung with fruit. 樹上果實累累。②吊死(hanged; hanged): He was hanged for murder. 他因謀殺而被絞死。

　　5. In the following spring, the seeds should be knocked out of the seed-heads and sown. 第二年春天，種子應該從谷穗上敲打下來，然后播種。形容詞following 緊接著、下一個: It rained on the day we arrived, but the following day was sunny. 我們到達的那天正下雨，但次日天氣晴朗。

　　6. He studied how to improve soil conditions. 他還研究了怎樣改造土壤狀況。condition 作單數的時候，表示人或物所處的具體狀態，這時候它的意義相當于state.如：The doctor said that the patient was in good condition. 醫生說病人狀況不錯。用作復數時，指一般情況，偏重于環境。如：They were interested in living conditions in Canada. 他們對加拿大的居住環境感興趣。

　　7. Here are five pieces of advice collected from Jia Sixies book Qi Min Yao Shu: 這是從賈思勰的《齊民要術》一書收集到的五條建議：這是倒裝句。又：Here are some examples. 這里有一些例子。Heres your watch. 這是你的手表。但主語是代詞不倒裝：Here they are. 再提醒：不能說advices或an advice，應說 some advice 或 a piece of advice。

　　8. But if you plant rice in a field one year and wheat in the field the next year, you will harvest good crops. 但如果你頭一年在這塊地里種水稻，第二年則在這塊地里種小麥，就會獲得好收成。掌握harvest的用法：①名詞：gather in the harvest of corn 收獲玉米；have another good harvest 又有一個好收成 ②動詞：The farmers are out harvesting the corn. 農民們在外收割莊稼。