Unit 2 Success Lesson3-2025-2026学年高中英语词汇变形及词缀精讲选择性必修第一册（北师大版）

高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 词汇精讲 Unit 2:Success Lesson 3 词汇变形及词缀精讲 全部单元单词 extreme/k'stri:m/n.极端 intensity'tensati/n.强度；强length1ey/n.长度 strive/strarv/i.努力：奋斗 烈 ugby/ragbi/n.(英式)橄榄球 encyclopaedia /m saikla'pi:dia/ selfish/'selfi/adj..自私的，自私apply oneself to sth努力；专心 n.百科全书 自利的 致志于某事 enty/'entri//n.条目 sacrifice/'saekrifars/n.牺牲 apart /a'pat/adj.&adv分开： academic/eka'demk/adj.学术 countless/'kaontlas/adj.无数散开 的 的，数不尽的 set sb/stha即art使与众不同 Iuin/'ru:n/t.毁掉，糟蹋，毁hire/'haa/t.租用 platform/'plaetfo:m/n.舞台；月 坏 triathlete /trar'eθli:t/n.铁人三台 skip /skip/V.不做（本来应做的项运动员 injured/'md3ad/adj.受伤的 事)：蹦跳着走 boil /borl/vi.&t.(使)沸腾，煮outstanding/.at'staend/adj. defensive/d'fensiv/adj.戒备的，沸 杰出的，优秀的 自卫的 boil down to sth归结为；要点average'vd3/adj.平庸的， element/elmant/n.基本部分；是 普通的：n.平均水平；平均数 要素 enormous/'nm3s/adj.巨大normal/n3ml/adj.正常的，平 workout/w3kat/n.训练，锻的，庞大的 常的 炼 stay in待在家里 词汇变形及词缀精讲 1.academic/,ek3'demik/adj.学术的 词汇变形 名词形式：academy(学院：研究院) 构词解析 后缀c:加在名词后构成形容词，表“与…有关的；具有…性质的”。 同类词：historic(历史的)、economic(经济的) We need to read more academic books to improve our research ability. 真题链接（北师大版高中选修1同步练习）：The professor will give an」 (academy)lecture on environmental protection next week.(答案：academic) 1 高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 2.defensive/d'fensrv/adj.戒备的，自卫的 词汇变形 动词形式：defend(防御：保卫) 名词形式：defence(英式)/defense(美式) 构词解析 前缀de-:表“向下；离开”；后缀-ive:构成形容词，表“具有…倾向的”。 同类词：attractive(有吸引力的)、active(积极的) 例句：The team took a defensive attitude in the second half of the game. 真题链接（北师大版高中选修1单元测试）：He raised his arm in a(defend)gesture when he saw the dog running towards him.(答案：defensive) 3.intensity/m'tensati/n.强度：强烈 词汇变形 形容词形式：intense(强烈的：紧张的) 副词形式：intensely(强烈地) 构词解析 前缀n-:表“加强”；后缀-ity:加在形容词后构成名词，表“性质；状态”。 同类词：difficulty(困难)←一difficult(困难的)、curiosity(好奇心)←一curious（好奇的) 例句：The intensity of the storm caused many trees to fall down. 真题链接（北师大版高中选修I阅读填空)：The(intense)of his love for music made him practice the piano for hours every day..(答案：intensity) 4.selfish/self/adj.自私的，自私自利的 词汇变形 名词形式：selfishness(自私) 构词解析 前缀sf:表“自己：自我”：后缀-ish:加在名词后构成形容词，表“具有…特征的：有点… 的”。 同类词：childish(孩子气的)、foolish（愚蠢的) It's selfish of him to take all the cookies without sharing with others. 真题链接（北师大版高中选修1完形填空）：She was criticized for her (selfish)when she refused to help her classmates.(答案：selfishness) 5.countless/'kaontlas/adj.无数的，数不尽的 词汇变形 动词形式：count(数；计数) 名词形式：count(计数：总数) 构词解析 前缀count..(词根“计数”)；后缀-less:加在名词后构成形容词，表“无…的：不…的”（反 义后缀)。 同类词：homeless(无家可归的)、careless(粗心的) 例句：There are countless stars in the sky on a clear night. 高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 真题链接（北师大版高中选修1语法填空)： _(count)people have lost their homes due to the natural disaster.(答案：Countless) 6.enormous/i'nm3s/adj.巨大的，庞大的 构词解析 前缀e-(同ex-,表“出：超出”)：词根nom(“标准”，如normal):后缀-ous:表“具有…性质 的”。 含义：超出标准的→巨大的 同类词：extraordinary(非凡的)、excessive（过多的) 例句：The company has made an enormous profit this year 真题链接（北师大版高中选修1阅读理解）：The new stadium has an (enormousness)capacity of80,000 people.(提示：此处需填形容词，答案：enormous) 7.outstanding/,at'staendn)/adj.杰出的，优秀的 词汇变形 动词短语：stand out（突出；显眼) 构词解析 前缀out-:表“向外；超过”；词根stand(“站立”)：后缀-ing:构成形容词，表“持续的状态”。 同类词：outgoing(外向的)、outspoken(直言不讳的) Her outstanding performance in the competition won her a scholarship 真题链接（北师大版高中选修1写作）：Asa__((stand out))student,,he was chosen to represent the school at the national conference.（答案：outstanding) 8.average/'aevarid3/adj.平庸的，普通的；n.平均水平：平均数 词汇变形 动词形式：average(平均为) 副词形式：averagely(平均地；一般地) 构词解析 前缀a-（加强)：词根ver(“真实；公平”，如verify“证实”)；后缀-age:构成名词或形容词，表 “状态；集合”。 例句：The average temperature in July is28 degrees in this city.. 真题链接（北师大版高中选修1数学应用）：The_(average)score of the class in the math test is 85.(答案：average) 9.normal/'nml/adj.正常的，平常的 词汇变形 名词形式：normality(常态：正常) 副词形式：normally(通常：正常地) 构词解析 前缀norm-（词根“标准”)：后缀-a:加在名词后构成形容词，表“有关…的：具有…性质的”。 同类词：national(国家的)、natural（自然的) 例句：It's normal to feel nervous before a big exam. 高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 真题链接（北师大版高中选修1语法填空)：After the storm,life gradually returned to (normal). (答案：normality) 10.injured/'nded/adj.受伤的 词汇变形 动词形式：injure(伤害；损害) 名词形式：injury(伤害；伤口) 构词解析 前缀i-（加强)：词根jure(“伤害”)：后缀-ed:构成形容词，表“已…的；被…的”。 同类词：interested(感兴趣的)、excited(兴奋的) 例句：The injured players were taken to the hospital immediately. 真题链接（北师大版高中选修1阅读理解）：He suffered a serious (injure)in the car accident (答案：injury) 11.apply/A'pla/v.申请；应用 词汇变形 名词形式：application(申请；应用) 形容词形式：applicable(适用的) 构词解析 前缀ap-(同ad-,表“向；去”)：词根ply(“折叠：应用”)：后缀-ation:构成名词，表“动作；过 程”。 例句：You need to apply for a visa before traveling to that country. 真题链接（北师大版高中选修1书面表达）：We are writing to _(application)for the summer camp organized by your school.(答案：apply) l2.apart/'pat/adj.&adv.分开；散开 词汇变形 动词形式：pat(分开；分离) 名词形式：pat(部分；零件) 构词解析 前缀a-(表“在…状态”)；词根pat(“部分；分开”)。 固定搭配：apart from(除…之外) 例句：The two villages are two kilometers apart. 真题链接（北师大版高中选修1完形填空)：She stood (apart)from the crowd,watching silently. (答案：apart) l3.platform/'platfo:m/n.舞台：月台 构词解析 前缀plat.(词根“平坦”)：fom(“形状：形式”)：后缀fom:表“具有…形状的”。 同类词：uniform(制服，“统一形状”)、reform(改革，“重新形成”) 例句：The speaker walked onto the platform and began his speech 真题链接（北师大版高中选修1词汇运用）：We waited for the train on the (platform)for half an 高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 hour.(答案：platform) 14.entry/'entri/n.条目 词汇变形 动词形式：enter(进入：登记) 构词解析 前缀n-(表“进入：使”)：词根r(“通过”)：后缀-y:构成名词，表“状态；行为”。 例句：You can find the word in the dictionary under the entry“climate”. 综合训练 一、 根据句意及汉语提示完成单词 6.The new library provides a good environment for_(学术的)research. 7.The soldiers built a strong (system along the border. 8.The」 (of the sunlight makes it necessary to wear sunglasses. 9.Her (behavior made her unpopular among classmates. 10.The (operation of the machine depends on regular maintenance 二、用所给单词的适当形式填空 1.The (academy)conference will be held in our city next month. 2.She has a(defend)attitude when talking about her mistakes. 3.The (intense)of the pain made him unable to sleep. 4.It's (selfish)to keep all the toys for yourself. 5.There are (count)stars in the universe. 6.The company has made an (enormousness)effort to improve product quality. 7.He is an (stand out)scientist in the field of medicine. 三、完成句子（每空一词） 1.除了英语，他还擅长数学。 English,he is also good at math. 5 高中选修1北师大版 【词汇精讲】 Unit 2:Success Lesson 3 2.他在事故中受了重伤。 He suffered a serious in the accident. 3.你需要提前申请这个职位。 You need to this position in advance. 4.这个体育场能容纳八万人。 The stadium has an capacity of 80,000 people. 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。 In a (norm)school day,students attend various classes.One of the most important is the (academy)lecture given by Professor Wang.His lectures are known for their (intense) and depth.Yesterday,he talked about environmental protection,emphasizing the need to reduce waste During the lecture,a student raised a question about (defend)the environment from pollution. The professor praised her(curious)and encouraged everyone to take action.After class,many students decided to (application)for volunteer programs to protect the environment. 参考答案 I根据句意及汉语提示完成单词 6.academic 7.defence/defense 8.intensity 9.selfishness 10.normal Ⅱ用所给单词的适当形式填空 1.academic 2.defensive 3.intensity 4.selfish 5.countless 6.enormous 7.out- standing I.完成句子 1.Apart from 2.injury 3.apply for 4.enormous V.语篇填空 1.normal 2.academic 3.intensity 4.defending 5.curiosity 6.apply 6