Unit 2 单元知识归纳 -2022-2023学年高一英语上学期同步精品课堂（人教版2019必修第二册）

Unit 2 一、词形转换 1.threat n．威胁 →threaten vt.威胁；危及 2.hunt v．打猎；搜寻；追捕 → hunter n．猎人 3.rate n．速度；(比)率 vt.划分等级 →rating n．等级；级别 4.extinct adj.已灭绝的 →extinction n．灭绝 5.press vt.压；按 →pressure n．压力；要求 6.concern n．担心；关心 vt.让……担忧；涉及 →concerned adj.担心的；关切的 7.legal adj.法律的；合法的 →illegal adj.不合法的；非法的 →illegally adv.不合法地；非法地 8.alarm vt.使害怕；使惊恐；使担心 n．警报；恐慌；警报器 →alarming adj.惊人的；使人惊恐的 →alarmed adj.担心的；害怕的 9.intend vi.& vt.打算；计划；想要 →intention n．打算；目的 10.exist vi.存在；生存 →existence n．存在；生存 二、重点单词和短语 rate n．速度；(比)率 vt.划分等级；评价；评估 ①Most people walk at an average rate of 5 kilometres an hour.n.速度 ②The birth rate of that country is reducing.n.(比)率 ③China and India are rated as the most attractive markets now.v.评价，看作 reserve n．(动植物)保护区；储藏(量)vt.预订；预留；保留 ①These seats are reserved for the elderly and women with babies.vt.预留 ②I'd like to reserve a table for three for eight o'clock.vt.预订 ③We set up a wildlife reserve to protect endangered elephants.n.保护区 die out灭绝；逐渐消失；逐渐熄灭 [例1]　With society developing，many old custo