2020届人教版高考英语选修7知识串讲：unit3

2020届人教版高考英语选修7知识串讲：unit3

‎-人教版选修七-unit 3‎ ‎【基础词汇】‎ ‎1.anecdote n. 轶事;奇闻 ‎2.offshore adv.& adj. 近海(的);离岸(的)‎ ‎3.telescope n. 望远镜 ‎4.shark n. 鲨鱼 ‎5.conservation n. 保存;保护 ‎6.jog vi.& vt.慢跑;轻推;轻撞 ‎7.seaside n.& adj. 海边(的);海滨(的)‎ ‎8.net n. 网;网状物;网络 ‎9.tide n. 潮(汐);潮水;潮流 ‎10.dimension n. 维(数);方面;侧面 ‎11.cell n. 细胞;(蜂房的)巢室 ‎12.seaweed n. 海草;海藻 ‎13.flashlight n. 闪光信号灯;手电筒;闪光灯 ‎14.suck vt.& vi. 吮吸 ‎15.boundary n. 界限;分界线 ‎16.awesome adj. 使人敬畏的;令人畏惧的 ‎17.seal n. 海豹;封条;印章 ‎【高频词汇】‎ ‎1.witness vt. 当场见到;目击　n.目击者;证人;证据 ‎2.shore n.岸;海滨 ‎3.opposite prep.& adj.在……对面相对的;相反的 ‎4.yell vi.大叫;呼喊　n.叫声;喊声 ‎5.pause vi.& n.暂停;中止 ‎6.teamwork n.协作;配合 ‎7.dive vi.& n.跳水(的动作);潜水(的动作);俯冲 ‎8.flee vi.&vt.逃避;逃跑;逃离 ‎9.drag vt.拖;拉;扯 ‎10.lip n.一片嘴唇;(容器或洞的)边,口 ‎11.urge vt.催促;极力主张;驱策 ‎12.abandon vt.放弃;遗弃;抛弃 ‎13.target n.目标;靶;受批评的对象 ‎14.pure adj.纯的;纯粹的;纯洁的 ‎15.grey adj.& n.灰色(的)‎ ‎16.shallow adj.浅的;肤浅的;浅显的 ‎17.steep adj.陡峭的 ‎【核心词汇】‎ ‎1.annual adj.每年的;按年度计算的　n.年刊;年鉴→annually adv.每年地 ‎ ‎2.accommodate v.为……提供住宿→accommodation n.住所;住宿 ‎3.deep adj.深的→depth n.深(度);深处 ‎4.urge vt.催促;极力主张;驱策→urgent adj.急迫的 ‎5.abandon vt.放弃;遗弃;抛弃→abandoned adj.被抛弃的;被遗弃的 ‎6.relation n.关系;亲戚→relationship n.关系;血缘关系;交往 ‎7.reflect　vi.思考　vt.映射;反射;思考→reflection　n.反映;影像;沉思 ‎ ‎8.aware adj.意识到的;知道的→awareness n.知道;意识 ‎9.vivid adj.生动的;鲜明的;鲜艳的→vividly adv.生动地;鲜明地 ‎10.neat adj.整齐的;匀称的→neatly adv.整齐地;匀称地 ‎11.narrow　adj.狭窄的;有限的;狭隘的→narrowly　adv.狭窄地;狭隘地 ‎ ‎12.sharp adj.锐利的;锋利的→sharpen vt.&vi.(使)变锋利;削尖 ‎13.taste v.尝起来→tasty adj.好吃的;可口的 ‎14.scare vt.恐吓　vi.受惊吓→scared adj.惊慌的;吓坏的 ‎ ‎15.pension n.养老金;退休金→pensioner n.领取养老金者 ‎【词汇拓展】‎ ‎1.reflect用法小结 reflection n.影像;深思 reflect on/upon sth.思考某事 reflect sth.from sth.从某物(表面)反射(光、热、声等)‎ be lost in reflection陷入沉思中 ‎2.常见反义词 shallow(浅的)→deep(深的)‎ narrow(窄的)→wide(宽的)‎ ‎3.urge相关用法大全 urge sb.to do sth.催促某人做某事 urge sb.on 鼓励/激励某人 have the urge to do sth.有做某事的欲望 urge that...(should)do sth.极力主张;强调……‎ It is urged that...(should)do sth.坚决要求……‎ ‎4.含词根“viv/vit(生命)”的常见单词 vivid adj.生动的 survive vi.&vt.存活;幸存 survival n.存活;幸存 vital adj.有活力的;重要的 vitamin n.维生素 ‎5.help用法复习 help sb.do/to do sth.帮助某人干某事 help yourself (to sth.)随便自己动手(夹菜吃、用……等)‎ with the help of sb.=with one’s help 在某人的帮助下 help (...)out 帮助(某人)摆脱困境或危难 help sb.with/(to)do sth.帮助某人某事/做某事 can’t help doing sth.忍不住做某事 can’t help but do sth.只得做某事;不得不做某事 ‎【短语】‎ ‎1.the Antarctic 南极洲　　　　　　 ‎ ‎2.upside down 上下翻转 ‎3.(be) scared to death 吓死了 ‎ ‎4.float up to 浮到……上来 ‎5.a witness to sth.某事的证人 ‎1.对……知道、明白;意识到…… be/become aware of ‎2.在此期间;与此同时 in the meantime ‎3.帮助(某人)摆脱困境或危难 help (...) out ‎4.(表示空间)在……前面;(表示时间)比……更早 ahead of ‎5.向……瞄准 aim at ‎ ‎6.整理;挑出 sort out ‎7.认真思考某事 reflect on/upon sth ‎【短语拓展】‎ hold相关短语集合 hold up耽搁;延误;举起 hold back踌躇;阻止 hold on坚持;抓住;稍等(电话用语)‎ hold on to守住;不卖某物 ‎【句式】‎ ‎1.It was a time when the killer whales,or “killers” as they were then called,helped the whalers catch the baleen whales that were on their annual migration.‎ 那个时候,虎鲸(当时被称为“杀手”)帮助捕鲸人在每年须鲸迁徙时捕捉须鲸。‎ 考点提炼句中 a time 表示“一段时间”,相当于 a period of time,后接when 引导的定语从句。‎ ‎2.The water was quite shallow but where the reef ended,there was a steep drop to the sandy ocean floor.‎ 水很浅,但到了珊瑚礁的尽头,就有一个陡坡,一直下降到满是沙子的海底。‎ 考点提炼where...,there be...,意为“在……的地方,有……”,where引导地点状语从句。当where,wherever指具体地点时,从句可用于主句之前或之后。‎ ‎【仿写句子】‎ ‎1.那么贵的书那个时候我们买不起。‎ It was a time when we couldn’t afford to pay for such expensive books.‎ ‎2.有志者事竟成。‎ Where there is a will,there is a way.‎ ‎【语篇填空】‎ ‎　　On the morning of 19th January,I went snorkelling.1.Seeing(see)such extraordinary beauty,I think every cell in my body woke up and 2.it was like discovering a whole new dimension of life.During the trip,I first became aware 3.of the vivid colours surrounding me and the fantastic corals,in and around which all kinds of elegant fish 4.were(be)swimming.I also found that the fish didn’t seem to mind me swimming among them.5.But there was still something 6.that made me feel 7.frightened(frighten).For example,I didn’t want to get close to the eel,the giant clam and the grey reef shark,for they made me scared to 8.death(die)for a moment.‎ It is a wonderful and 9.limitless(limit)world under the sea.10.What a tiny spot I was in this huge world!‎