Unit 5 Using Language知识点课件-2021-2022学年高中英语人教版（2019）选择性必修第一册

选修一 Unit 5 Using language 知识点讲解 课堂•重难突破 课前•基础认知 词汇精讲 句型剖析 1.【教材原文】They may look beautiful on the outside,but inside there is usually more water than essential minerals, and they often have less flavour as well.(Page 55) 它们可能外表看起来很漂亮,但里面通常有更多的水,而不是必需的矿物质,而且它们的味道通常也更差。 课堂•重难突破 课前•基础认知 词汇精讲 句型剖析 考点 essential adj.完全必要的;极其重要的 be essential to/for 对……很重要 It is essential that...(should) do... 做……是完全必要的。 It is essential for sb to do... 对某人来说做……是完全必要的。 课堂•重难突破 课前•基础认知 词汇精讲 句型剖析 学以致用 单句语法填空 (1)When we learn a language,it is essential for us 　to write　(write) compositions.  (2)Sun and water are essential 　to/for　 the growth of crops. (3)It is essential that you 　(should) learn　(learn) Chinese history.  课堂•重难突破 课前•基础认知 词汇精讲 句型剖析 2.【教材原文】As an alternative,some farmers have switched to organic farming,and many customers have turned to organic food when they shop at the local grocery. (Page 55) 作为一种选择,一些农民已经转向有机农业,而且许多顾客在当地杂货店购物时转向有机食品。 课堂•重难突破 课前•基础认知 词汇精讲 句型剖析 考点 alter