Unit 5 A delicate world Starting out& Understanding ideas学案 2022-2023学年高中英语外研版（2019）选择性必修第二册

Section A Starting out & Understanding ideas 学习目标 1、学会本节单词、短语。 2、掌握本节句型表达与运用。 知识运用 1.decrease 词性：_________ 意思：________ 词性：_________ 意思：________ 常用搭配 decrease from… to… 从……减少到…… decrease by… 减少了……decrease to… 减少到…… on the decrease在下降 近义词 decline v.&n.下降：减少 drop vi.（水平）降低；（数量）减少n.下跌；下降；减少 fall v.&n.下降 反义词 increase v.&n.上涨；增加 boom v.&n.快速增长；激增 rise v.& n.上升；增加 练习：Our coal output is 4/5 of that of last year—that is, it has decreased _____ 20%. 2.trap 词性：_________ 意思：________ 词性：_________ 意思：________ 常用搭配 be/get trapped(in/on/into…)困于……；陷于…… trap sb. into（doing）sth. 诱骗某人(做）某事 练习：Because of the greenhouse effect the Earth is warmed by gases _____ (trap) in the atmosphere. 3. owe 词性：_________ 意思：________ 常用搭配 owe sb sth=owe sth to sb欠某人某物；把……归功于某人 our sb a lot/a great deal= owe a lot/a great deal to sb 非常感激某人 owing to 由于 练习：We owe a great deal _____ our parents. 句型梳理 Nor would they fail to imagine how its native inhabitants... existed in perfect harmony with their natural habitat