Unit 4 Information Technology Lesson3-2025-2026学年高中英语词汇变形及词缀精讲必修第二册（北师大版）

高中必修2北师大版 【词汇精讲】 Unit 4:Information Technology Lesson 3 必修2 Unit 4:Information Technology Lesson 3 词汇变形及词缀精讲 全部单元单词 harm /ham/t.&n.伤害，损害shallow∫ela/adj.肤浅的，浅手机 argument/a:gjumant/h.论点；薄的 tablet/'taeblt/n.平板电脑：药 论据 *trivial/'trivial/adj.没有什么价片：碑，牌 replace /r'plers/vt.取代：接替 值的：微不足道的 limiting/'lnt四/adj.局限的，限 hug /hag/n.&t.拥抱；紧抱 basis/'beisIs/n.基础：基点 制性的 concentrate/'kDnsntrert/,i.专percent /p3'sent/n.百分比；百brief /bri:f/adj.简洁的，简明的 注，专心：集中注意力 分数 *emoji/'maod3in.表情符号 concerned /kan's3nd/adj.关切opinion/'pmjen/n.意见：看法；creative /kri'eItv/adj.创造性的 的，关心的 主张 *thought-provoking adj..发人深 be concerned with关心… focus/'faukas/vi..&t.集中（注省的，令人深思的 rewarding /rr'w:dm/adj.有益意力)：n.焦点 authority:'prati/n.权威人士： 的：有意义的 focus on关注 专家 addition/'dn/m.增添：添加 maintain/mem'tem/vt.保持：维 in addition除此之外 持 content/'kpntent/h.内容 smartphone/'sma:tfn/h.智能 词汇变形及词缀精讲 1.argument/'a:gjumant/n.论点；论据 动词形式：argue(争论：主张) 构词解析 后缀-ment:加在动词后构成名词，表“行为、结果”。 同类词：agreement(同意)、development(发展) They had a heated argument about whether students should use smartphones at school. 真题链接（北师大版高中必修2同步练习）：Hismain__(argue)is that technology has both advantages and disadvantages.(答案：argument) 2.replace /rI'plers/t.取代；接替 名词形式：replacement(替代物：替换) 构词解析 高中必修2北师大版 【词汇精讲】 Unit 4:Information Technology Lesson 3 前缀re-:表“再、重新”；词根place(放置)：后缀-ment构成名词。 同类词：rebuild(重建)、reuse（再利用) Online communication cannot completely replace face-to-face conversations. 真题链接（北师大版高中必修2教材例句）：New technology has replaced many traditional ways of working. 3.concentrate/'kpnsntreit/vi..专注，专心；集中注意力 名词形式：concentration(专注；集中) 形容词形式：concentrated(集中的；浓缩的) 构词解析 前缀con-:表“共同、一起”；词根cent（中心)：后缀-ate构成动词，-tion构成名词，-ed构成形 容词。 It's hard to concentrate on studying when there are too many distractions around. 真题链接（北师大版高中必修2同步练习）：Good__(concentrate)is necessary for effective learning.. (答案：concentration) 4.concerned /kan's3nd/ad.关切的，关心的 动词形式：concern(涉及：使担忧) 名词形式：concern(担心；关切) 构词解析 前缀con-:表“共同”；词根cern(分开，辨别)：后缀-ed构成形容词。 固定搭配：be concerned about(担心…)、show concern for（对…表示关心) 例句：Parents are always concerned about their children's safety. 真题链接（北师大版高中必修2教材例句）：Many people are concerned with the impact of social media on teenagers. 5.addition/'dn/h.增添：添加 动词形式：add(增加：添加) 形容词形式：additional(额外的；附加的) 构词解析 词根add(增加)：后缀-ition构成名词，-al构成形容词。 固定搭配：in addition(除此之外)、in addition to(除…之外) 例句：In addition to reading,he also likes playing sports. 真题链接（北师大版高中必修2同步练习)：Ve need」 (add)some new books to our school library. (答案：to add) 6.content/'kpntent/m.内容 形容词形式：content(满足的，读作kan'tent/) 动词形式：content(使满足，读作kan'tent/) 构词解析 词根tent(持有)：前缀con-(共同)：作为名词时表“所持有的东西”即“内容”；作为形容词/动 词时表“共同持有”即“满足”。 2 高中必修2北师大版 【词汇精讲】 Unit 4:Information Technology Lesson 3 The content of this article is mainly about environmental protection. 真题链接（北师大版高中必修2教材例句)：Are you content with your present life? 7.basis/'beisIs/h.基础：基点 复数形式：bases/'beisi:z/ 形容词形式：basic(基本的；基础的) 构词解析 词根base(基础)：后缀-is构成抽象名词，-ic构成形容词。 固定搭配：on the basis of(在…的基础上) 例句：Trust is the basis of any good relationship. 真题链接（北师大版高中必修2同步练习）：We should learn the (base)knowledge before moving on to difficult topics..(答案：basic) 8.percent/p3'sent/n.百分比；百分数 形容词形式：percentile（百分位的) 构词解析 前缀per-:表“每”；cent(百)：“每一百”即“百分比”。 About 60 percent of students in our class use smartphones every day. 真题链接（北师大版高中必修2教材例句）：Only30 percent of the survey participants were in favor of the new policy. 9.focus/f水svi.&t.集中（注意力）：n.焦点 过去式/过去分词：focused/focussed 复数形式：foci/'fausaI/或focuses 形容词形式：focal(焦点的：中心的) 构词解析 词根focus(火炉，引申为“焦点”)：后缀-al构成形容词。 固定搭配：focus on(关注：集中于) Students should focus on their studies instead of playing games all day. 真题链接（北师大版高中必修2同步练习)：The meeting will.__(focus)on the problem of online safety for teenagers..(答案：focus) l0.maintain /mem'ten/t.保持；维持 名词形式：maintenance(维护：保持) 构词解析 前缀main-(主要的)：词根tain（持有)：后缀-ance构成名词。 例句：It's important to maintain a healthy diet and regular exercise 真题链接（北师大版高中必修2同步练习）：The__(maintain)of public order is the responsibility of everyone in society.(答案：maintenance) Il.creative /kri'etv/adj.创造性的 动词形式：create（创造；创作) 3 高中必修2北师大版 【词汇精讲】 Unit 4:Information Technology Lesson 3 名词形式：creativity(创造力)：creation(创造物) 构词解析 前缀cre-(产生，制造)；后缀tive构成形容词，-ivity构成名词，-ion构成名词。 例句：She has a creative mind and often comes up with new ideas. 真题链接（北师大版高中必修2教材例句)：Reading can help develop children's creative thinking 12.author'ityb:'prati/n.权威人士；专家 形容词形式：authoritative(权威的：官方的) 动词形式：authorize(授权；批准) 构词解析 词根author(作者：创始人)：后缀-ity构成名词，-ative构成形容词，-ize构成动词。 We should consult an authority on education before making the decision. 真题链接（北师大版高中必修2同步练习）：The professor is an _(authority)figure in the field of environmental science.(答案：authoritative) 综合训练 一、 根据句意及汉语提示完成单词 1.His main (论点)is supported by scientific data, 2.The company is looking for a__(替代物)for the old equipment. 3.Good (专注)helps students learn more efficiently. 4.Teachers are always_(关t切的)about students'mental health, 5.In (此外)，we need to consider the environmental impact. 二、用所给单词的适当形式填空 1.You need to (argue)your point clearly in the debate.(提示：动词) 2.The (replace)of traditional energy with clean energy is a global trend. 3.She showed great (concentrate)while solving the math problem. 4.Many parents (concern)about the amount of screen time their kids have 5.The hotel provides (addition)services for disabled guests. 6.We should maintain a(create)attitude towards problem-solving. 三、完成句子（每空一词) 4 高中必修2北师大版 【词汇精讲】 Unit 4:Information Technology Lesson 3 1.科学家们正专注于研究新型疫苗。 Scientists are developing new vaccines. 2.除了英语，他还会说法语和西班牙语。 English,he can also speak French and Spanish. 3.政府对环境污染问题表示关切。 The government has shown environmental pollution. 四、语篇填空 阅读下面短文，在空白处填入一个适当的单词或用括号内单词的正确形式填空，使短文通顺、连 贯。 Nowadays,more students are (concern)about their study efficiency.To improve it,experts suggest several methods.First, (concentrate)is key-try to study in a quiet environment. Second,make a study plan on a regular(base).Third,avoid spending too much time on phones,as they can replace the time needed for learning.In (add),reading widely can de- velop (create)thinking.Remember,good habits help maintain long-term learning motivation. 参考答案 I.根据句意及汉语提示完成单词 1.argument 2.replacement 3.concentration 4.concemned 5.addition Ⅱ.用所给单词的适当形式填空 1.argue 2.replacement 3.concentration 4.concern 5.additional 6.creative II.完成句子 1.focusing on 2.In addition to 3.concern for V.语篇填空 1.concerned 2.concentration 3.basis 4.addition 5.creative