1、Period Using Language (见学生用书P93)It was raining heavily when the north wind was blowing.入伏刮北风，当时雨咚咚。1_nutritional_ adj.营养(物)的2nutritious adj. _有营养的；营养丰富的_nutrition_ n. 营养；滋养3alleviate vt. _减轻；缓解_4poverty n. _贫穷；贫困_5_organic_ adj. 有机的；不使用化肥的；有机物的6pesticide n. _杀虫剂；除害药物_7_widespread_ adj. 分布广的；普遍的；广泛的8
2、bacterium n. (pl. bacteria) _细菌_9_in_turn_ 相应地；转而；依次；轮流10_digest_ vt.& vi. 消化 vt.领会；领悟 n. 摘要；文摘11_essential_ adj. 完全必要的；极其重要的12_mineral_ n. 矿物；矿物质13_alternative_ n. 可供选择的事物adj. 可供替代的；非传统的14_grocery_ n. 食品杂货店；pl.食品杂货15_instance_ n. 例子；实例；事例_for_instance_例如；比如16_depth_ n. 向下(或向里)的距离；深(度)17_root_ n. 根；
3、根茎；根部；根源18_entirely_ adv.全部地；完整地；完全地19_aspect_ n. 方面；层面Step 1PrereadingWhat ways can you think of to increase our crop harvest?_答案不唯一，合理即可。_Step 2Whilereading1输入为先，阅读梳理文脉Task：文本整体理解：关注布局谋篇Read the text and choose the best answer to each question.(A)1Why did many farmers welcome the introduction of c
4、hemical farming?AIt can fight crop disease and increase production. BIt doesnt harm the land or peoples health. CIt can help produce rich soil. DIts not expensive. (D)2What concerns many people about the use of pesticides?APesticides can damage the land. BChemicals can stay in the soil for a long ti
5、me.CPesticides can kill harmful bacteria and insects. DChemicals may make people ill and even cause cancer. (A)3Why do organic farmers change the kind of crop grown in each field every year?AIt helps put important minerals back into the ground. BIt can avoid damage to the environment. CIt can help i
6、ncrease output. DThe writer doesnt tell us. (D)4Why cant we stop the use of manmade chemicals in agriculture entirely?AOrganic farming costs us a lot of money. BOrganic farming can meet peoples need. CChemical farming has brought us huge profit. DChemical farming helps serve the need for food.2细读课文，
7、关注表达策略学结构Part 1(Para.1 & Para.2)The (1)_problems_with chemical farming.Part 2(Para.3)What organic farming is.Part 3( Para.4)Organic (2)_methods_for producing rich soil.Part 4(Para.5)(3)_Why_manmade chemicals are still used in farming.学技巧本文用了多种写作手法。第一、二段摆事实、讲道理，说明了化学耕作存在的问题。第三段下定义，告诉我们什么是有机农业。第四段举例子，
8、列举了有机农业种植如何保持土壤肥沃的方法。学语言1This affects the crops grown on the land and，in turn，the animals and humans who digest them.这影响了生长在土地上的作物，进而影响了消化它们的动物和人类。(教材P55)in turn相应地；转而；依次；轮流by turns轮流地；交替地take turns (to do sth) 轮流(做某事)Its ones turn to do sth. 轮到某人做某事。 【活学活用】(1)When you play cards，each plays_in_turn_
9、玩牌的时候大家轮流出牌。(2)Sam and I drove the car _by_turns/in_turn_我和萨姆轮流开车。(3)They_took_turns_to_ look after their parents.They looked after their parents in turn.他们轮流照顾他们的父母。(4)_Its_your_turn_to_read_ the passage.轮到你来读这篇文章了。(1)in turn表示“轮流；相应地”，而in return (for)则表示“作为(对)回报”。(2)by turns和take turns中的turn用复数形式。
10、2As an alternative，some farmers have switched to organic farming，and many customers have turned to organic food when they shop at the local grocery.作为一个选择，一些农民已经开始转向有机耕作，并且当很多顾客在当地的食品杂货店购物的时候，他们已经转向有机食品。(教材P55)alternative n(something you can choose to do or use instead of something)可供选择的事物 adj.可供替代的
11、；非传统的(1)have no alternative but to do sthhave no choice but to do sth别无选择只有做某事have the alternative of拥有的选择权(2)alternative energy 替代性能源alternative ways/approaches/methods 可供选择的方法alternative suggestions 可供选择的建议 【活学活用】(1)There must be _an_alternative to people sleeping on the streets.一定要想办法解决街头露宿者的问题。(
12、2)Im afraid I_have_no_alternative_but_to_ask you to leave.恐怕我别无选择，只有让你离开。(3)You_have_the_alternative_of_speaking or keeping quiet.你拥有选择说话或保持沉默的权利。(4)新北师大选择性必修第四册People who work in the area of physics also recommended that _alternative_fuel_and_energy_ sources would need to be researched.在物理学领域工作的人也建
13、议对替代燃料和能源进行研究。“别无选择只好做某事”的其他表达形式：(1)can do nothing but do sth(2)cant do anything but do sth(3)cant choose/help but do sth3Organic farmers also plant diverse crops that use different depths of soil to help keep it rich. 有机农场主还种植生长于不同深度的土壤的多种作物，来帮助保持土壤肥沃。(教材P56)depth n. 向下(或向里)的距离；深(度)in depth全面；深入；详细
14、in the depths of 在最深处at a depth of 30 metres 在30米的深处a metre in depth 一米深 【活学活用】(1)新概念3The platforms extend to_a_depth_of_over 100 feet under the sea.这些平台深达海底100多英尺。(2)I havent looked at the report _in_depth_ yet.我还没仔细看这份报告。(3)_In_the_depths_of_my_memory_， many things I did with my father still live.
15、在我的记忆深处，我与父亲一起做过的很多事仍然历历在目。【语境助记】She belongs to herself. Nobody can measure the depth of her heart, deep as sea. 她属于自己，没有人能测出她的心有多深，深似大海。 【拓展归纳】以“th”为后缀的高频词一览depth n深度growth n成长；发育；增长；发展width n宽度length n长度strength n力量；力气warmth n温暖wealth n财富4For example，pesticides can damage the land by killing not o
16、nly harmful bacteria and insects，but also helpful ones.例如，农药不仅杀死有害的细菌和昆虫，还会杀死有益的细菌和昆虫，进而会破坏土地。(教材P55)句型公式：本句中not only.but also.连接两个并列成分，着重强调后者，其意为“不仅而且”；其中的also有时可以省略。句型解读：(1)not only.but also.连接两个句子，且not only位于句首时，not only所在的句子要用部分倒装。(2)not only.but also.连接两个成分作主语时，其谓语动词的单复数通常与靠近的主语保持一致，即遵循就近原则。 【活
17、学活用】(1)I can _not_only_ share ideas with others, _but_also_learn_to_ express myself clearly.我不但能够和他人分享我的想法，而且还能够学会清晰地表达自己(的观点)。(2)It was not until I came here that I realized this place was famous for_not_only_its_beauty_but_(also)_its_weather_直到我来到这里，我才意识到这个地方不仅以它的美丽而且以它的天气而闻名。(3)Not only_did_we_fo
18、rget_to_turn_off_ the light in the kitchen，but we (also) failed to lock the front door.我们不仅忘记关厨房的灯，而且也没锁前门。(4)Not only the children but (also) their coach _likes_(like) playing football.不仅是孩子们，他们的教练也喜欢踢足球。5This makes the soil in their fields richer in minerals.这使得他们地里的土壤富含矿物质。(教材P55)句型公式：makes the s
19、oil in their fields richer in minerals为“make名词形容词”组成的复合结构。句型解读：“make宾语宾语补足语”结构中，宾语补足语可以用省略to的动词不定式、形容词、名词或介词短语。 【活学活用】(1)The boss made them _work_ (work) day and night.老板迫使他们日夜工作。(2)Experiences will _make_him_a_man_经历将会使他成为一个堂堂男子汉。(3)He turned me down, which _made_me_at_a_loss_他拒绝了我，这让我不知所措。make后接名词
20、作宾补时，若作宾补的名词是表示独一无二的职位，如president，chairman，monitor，headmaster，manager，head，captain等，则该名词前不用任何冠词。6Why different crops are grown is because they put important minerals back into the ground，making it ready for the next batch of crops.为什么要种植不同的作物，是因为它们把重要的矿物质放回地里，让它为下一批作物做好准备。(教材P56)句型公式：句型解读：making it.
21、为现在分词短语作结果状语，表示前面的情况所造成的结果，相当于which makes it., making与逻辑主语为主动关系；现在分词作结果状语多表示一种合乎情理的，顺其自然的结果。 【活学活用】(1)Many people moved to New York，_making_it_the_largest_city_in the USA.很多人去了纽约，使之成为美国最大的城市。(2)Soon after，there are two entrances to the parking lot，_making_it_easier_for us to enter it.不久之后，将有两个入口通往停车场，使得我们进去更加容易。(3)The child slipped and fell，_hitting_his_head_against_the_door_(and hit his head against the door).那孩子滑了一跤摔倒了，头撞到了门上。动词不定式也可作结果状语，但它通常表示一种“偶然的、出人意料的”结果，有时为了强调这种意外的结果，可在不定式前面加only，译为“(结果)却”。I hurried to his house，only to find him out.我急急忙忙赶到他家，结果却发现他不在家。温馨说明：课后请完成高效作业23)