Unit2 Grammar and usage 学案Teaching aims and demands Teaching aims and demandsTo teach the element of a paragraphTo put what they learnt into practiceKey points:To teach the element of a paragraphTo put what they learnt into practiceTeaching steps:一、 Revision 1.agriculture 农业 2.cost of living 生活成本(费用)3. industrialization 工业化 4. industrialized 工业化的5.rural 农村的 6. urban 城市的7.urbanization 城市化的 8.migration pattern 迁移模式9.modernization 现代化 10. living standards 生活水平二、The elements of a paragraph1. Ask students to read the second paragraph of the magazine article in the Reading section and try to find which sentence in the paragraph .Tell students that the sentence which gives the main point of a paragraph or an article is the topic sentence. 2. Ask students to read the second paragraph under the subtitle of ‘Bright lights , big city’ and identify the topic sentence and supporting sentences in it.3.Ask students to read both the instructions and Part1 in this section. And choose the right answer. 4.Ask students to read Part 3 to understand what a concluding sentence is ,then get students to read the paragraph in Part B.First add transitions to complete the paragraph, and then point out the topic and concluding sentences.5.Language points:1. numb adj 麻木的 2.physicist n. 物理学家3. biologist n. 生物学家 4..botany n. 植物学用心 爱心 专心15.biochemistry n. 生物化学 6.analytical adj 分析的.7lawyer n. 律师 8.firm n. 公司9.law firm 律师事务所 10.adjustment. n. 调整11.bungalow n. 平房, 小屋 12.go bowling 打保龄球13.skateboard n. 滑板 14.astronomer n. 天文学家15.telescope n. 望远镜 16.bakery n. 面包店三、Consolidation.Read the following article. Then write the letter of the topic sent...