Unit 5 Working the Land Using Language & Assessing Your Progress 知识点学案-2020-2021学年高一下学期英语人教版（2019）选择性必修第一册

Section Ⅲ　Using Language & Assessing Your Progress 重点词汇讲解 Point1 alleviate  用法详解 alleviate vt. 减轻;缓解 常见搭配:alleviate the problem/situation/suffering减轻/缓解问题/状况/痛苦 A number of measures were taken to alleviate the problem.采取了一系列措施缓解这个问题。 Our proposed approach would help to alleviate this problem.我们建议的方法将有助于缓解这一问题。 经典例题 单句语法填空 (1)Nowadays, a great deal can be done 　　　　(alleviate) back pain.  (2)It is a common problem that can 　　　　(alleviate) and cured if you act quickly.  Point2 in turn 用法详解 in turn可做状语, 常位于句中或句末。其含义有以下两种: (1)转而,相应地 Theory is based on practice and in turn serves practice.理论来源于实践,反过来又服务于实践。 (2)轮流,依次,逐个 The children called out their names in turn.孩子们逐一自报姓名。 辨析比较in turn,in return与in return for  易混词组 区别 in turn ①意为“相应地,转而”;②意为“依次,轮流,逐个”。 Increased production will, in turn, lead to increased profits.增加生产会继而增加利润。 The children got on the bus in turn.孩子们依次上了公共汽车。 in return 意为“作为回报”,可单独使用。 Tom helped me a lot.In return, I invited him to dinner.汤姆帮了我许多,作为回报,我请他吃晚饭。 续表 易混词组 区别 in return for 意为“作为对……的回报”,相当于in reward for。 I invited Tom to dinner in return for his help.为了回报汤姆的帮助,我请他吃了晚饭。 经典例题 用in turn, in return和in return for填空 (1)The students answered the teacher’s questions 　　　　.  (2)Tom would like to do something for his parents 　　　　everything they’ve done for him.  (3)While staying in the village, James unselfishly shared whatever he had with the villagers without asking for anything 　　　.  (4)A clean environment can help the city bid for the Olympics,which 　　　　will promote its economic development.  Point3 digest 用法详解 vt. & vi.(1)消化(食物) Most babies can digest a wide range of food easily.大多数婴儿能够轻易地消化多种食物。 (2)理解 I struggled to digest the news.我费力地琢磨着那条新闻。 n.摘要,文摘 The organization publishes a regular digest of environmental statistics.该组织定期出版一份环境统计数据摘要。 经典例题 单句语法填空 (1)It often takes a long time 　　　　(digest) new ideas.  (2)Some books are to be chewed and 　　　　(digest).  Point4 alternative  用法详解 (1)adj.可供替代的 Do you have an alternative solution?你有没有别的解决办法?