Unit 4 Breaking boundaries高频词汇知识点清单 2023-2024学年高中英语外研版选择性必修第二册

新教材外研版 英语选择性必修第二册 UNIT 4 UNIT 4高频词汇 知识点清单 Unit 4　Breaking boundaries 高频词汇精讲 1. assist v.协助,帮助;促进 It assists people based on need, regardless of which country they are from. 它根据需要帮助人们,不管他们来自哪个国家。 (教材P50) 情景导学 I always assist my parents in doing the dishes after meals. 饭后我总是帮助我的父母洗碗。(2021全国乙) Ding Talk is an app which can assist teachers with/in online classes and the collection of homework.钉钉是一款可以帮助教师在线上课和收作业的应用程序。 用法归纳 ①assist (sb.)　with/in   sth. 帮助(某人)某事 ②assist (sb.)　in    doing sth. 帮助(某人)做某事 易混辨析 assist 比help正式,着重指“协助”,受协助的人自己做主要工作 help 普通用词,指一般意义上的帮助 aid 强调帮助受难者脱离困难或危险 词汇拓展 ①assistance n.帮助;援助 be of great assistance 有很大帮助 with the assistance of... 在……的帮助下 ask for one’s assistance 请求某人的援助 come to one’s assistance 来帮助某人 •He can walk only with the assistance of crutches. 他只能在拐杖的帮助下走路。 (牛津高阶) •He cried loudly, hoping that someone would come to his assistance. 他大声喊叫,希望有人来帮助他。 ②assistant n.助理;助手 2.  vital adj.极其重要的;必不可少的;生气勃勃的 But it is vital not to take any chances.但至关重要的是不要冒任何风险。 (教材P50) 情景导学 It is vital to adapt to the new environment quickly.迅速适应新环境是至关重要的。 It is of vital importance to keep the old tradition alive. 使古老的传统保持生机是至关重要的。 It is vital that we (should) have enough sleep to stay healthy. 我们应该有充足的睡眠来保持健康,这是至关重要的。 (写作—健康) Painful experiences are in fact vital for/to our development and they play a key role in helping us to develop our ability to feel truly happy. 痛苦的经历实际上对我们的发展至关重要,它们在帮助我们培养感受真正快乐的能力方面发挥着关键作用。 用法归纳 ①be vital　for/to    ... 对……至关重要 ②be of vital importance　 至关重要   ③play a vital part/role in...在……中起着极其重要的作用 ④it is vital　to do    sth. 做某事是极其重要的 ⑤it is vital that... ……是极其重要的(that从句要用虚拟语气,即从句谓语用“　should    +动词原形”,　should 可以省略) 3.  relieve vt.给(某人)换班;解除/缓和(不快或痛苦);减轻(问题的难度或严重性);调剂, 使有趣;解除……的职务 My mission was to relieve Emma...我的任务是接替埃玛…… (教材P50) 情景导学 Many interesting activities were held in our school in order to relieve the students of their pressure. 为了减轻学生的压力,我们学校举办了许多有趣的活动。(写作—学校生活) Not only can travel help us relieve stress, but it