高中英语人教版新教材选择性必修二Unit 1 Science and Scientists教学课件.pptx

Unit 1 Science and Scientists选择性必修二 1. severe adj. ① extremely bad or serious severe weather conditions 恶劣的天气情况His injuries are severe. 他的伤很重。② not kind or sympathetic and showing disapproval of sb./sth. a severe expression 严厉的表情She was a severe woman who seldom smiled. 她是个严肃的女人，脸上很少出现笑容。课中讲练 severe adj. ③ ~ (on/with sb.) punishing sb. in an extreme way when they break a particular set of rules a severe punishment/sentence 重罚；重判be severe with oneself 严于律己________ adv. 严重地；严厉地________ n. 严重，严重性；严肃，严厉（的态度）severely severity 2. suspect vt. /s??spekt/ 推测，怀疑，认为 suspect sb. of (doing) sth. to have an idea that sb. is guilty of sth, without having definite proof 怀疑某人（做过）某事① The drug is suspected of causing over 200 deaths. ② Bill ____________________（被怀疑是）a spy.n. /?s?spekt/ 嫌疑犯，被怀疑者____________ n. 怀疑；嫌疑；猜疑____________ adj. 可疑的was suspected of beingsuspicionsuspicious 相同结构的有：__________________ 提醒某人……___________________抢了某人……___________________通知某人… …_________________ 治愈某人…________________ 警告某人……_________________ 说服某人相信…_________________ 欺骗某人…_________________ 指控/责备某人…remind sb. of sth.rob sb. of rm sb. of sth.cure sb. of sth.warn sb. of sth.convince sb. of sth.cheat sb. of sth.accuse sb. of sth. 3. decrease vt. vi. 减少；（使）变小；或变少①会员数减少到150人。 The membership _________ ___ 150. ②家里的零食少了10包。The number of snacks has _________ ___ 10 packs. ③ The number of members decreased ______ 210 ____ 160 this year. ④ This species of bird is decreasing ____ numbers every year. 这种鸟的数量在逐年减少。⑤ People should decrease the amount of fat they eat. todecreased todecreased byfromin n. 减少，减少的数量There has been some decrease in military spending this year. on the decrease 在减少The birthrate is on the decrease. increase vi. vt. 增加；增长；增强 n. 增加__________________ 增加了__________________ 增加到__________________ 从A增加到B__________________ 在增加increase byincrease toincrease from A to Bon the increase 4. defend v.defend sb./sth. from/against sb./sth.: ① to protect sb./sth. from attack 防御；保护；保