Unit 2 Amazing numbers-2026-2027学年八年级英语上册词汇精讲精练（沪教版）

U2 Amazing numbers 词汇精讲精练 核心词汇概览： schedule;challenge;promise,reply,hesitation;wonder;agree;currently,sharply, symbol;represent;without hesitation;instead of 词汇精讲 序号 单词/短语 词汇讲解 schedule 释义：n.日程表，计划表：v.安排，预定 fedju:I/(英)/'sked3u:1/词形变化：scheduled(adj.预定的)；reschedule(w.重新安排) (美) 搭配：on schedule按时；behind schedule落后于计划；a tight schedule紧凑的日程 词根词缀：来自拉丁语schedula“小纸条”，后引申为“时间表” 例句：We have a busy schedule this week. 这周我们的日程很满。 2 challenge 释义：n.挑战；v.向…挑战，质疑 /'tfaelind3/ 词形变化：challenger(m.挑战者)；challenging(adj.有挑战性的) 搭配：face a challenge面对挑战；meet the challenge迎接挑战： challenge sb.to sth.向某人挑战某事 词根词缀：chall--(呼叫+-enge(名词后缀)→原指“指控”，后 引申为“挑战” 例句：Learning a new language is a big challenge. 学习一门新语言是个大挑战。 promise 释义：v.承诺，许诺；n.承诺，诺言 /promis/ 词形变化：promised(过去式)；promising(adj.有前途的) 搭配：make a promise许下诺言；keep a promise遵守诺言；break a promise违背诺言；promise to do sth.承诺做某事 词根词缀：pro-(向前)+mise(发送)→原指“事先发出的话” 例句：He promised to help me,. 他承诺要帮我。 reply 释义：v.&n.回答，答复 I'plav 词形变化：replied(过去式/过去分词)；replying(现在分词) 搭配：reply to sb./sth.回答某人/某物：in reply to作为对…的 答复 词根词缀：e-(回)+ply(折，叠)→折回去→答复 例句：Please reply to my email as soon as possible. 请尽快回复我的邮件。 hesitation 释义：n.犹豫，迟疑 /hezr'ter fn/ 词形变化：hesitate(v.犹豫)；hesitant(adj.犹豫的)；hesitantly (adv.犹豫地) 搭配：without hesitation毫不犹豫；have no hesitation in doing sth. 毫不犹豫做某事 词根词缀：hesit-(黏着，迟疑)+-ation(名词后缀)→犹豫 例句：She answered the question without hesitation. 她毫不犹豫地回答了问题。 wonder 释义：v.想知道，琢磨：n.惊奇，奇迹 /'wanda(r)/ 词形变化：wonderful(adj.极好的)；wondering(adj.疑惑的) 搭配：wonder about sth.对某事感到好奇；wonder at sth.对… 感到惊讶；No wonder...难怪… 词根词缀：与“wander'同源，原指“眼睛转动”，引申为“好奇” 例句：I wonder why he is late. 我想知道他为什么迟到。 agree 释义：V.同意，赞同 /a'gri/ 词形变化：agreement(.协议)；disagree(w.不同意)；agreeable (adi.令人愉快的) 搭配：agree with sb.同意某人：agree to sth.同意某事；agree on th.就某事达成一致 词根词缀：a-(加强)+gree(令人愉快)一使愉快→同意 例句：I agree with your idea. 我同意你的想法。 8 currently 释义：adv.目前，当前 /'kArantli/ 词形变化：current(adj.当前的：n.水流/电流)；currency(.货币) 搭配：currently available当前可用的 词根词缀：cr-(跑，流)+-rent(形容词后缀)+-y(副词后缀) →正流动着的→当前 例句：He is currently working on a new project. 他目前正在做一个新项目。 sharply 释义：adv.急剧地；严厉地：锋利地 /Sa:pli/ 词形变化：sharp(adj.锋利的；急剧的)；sharpen(v.使锋利) 搭配：rise sharply急刷上升；turn sharply急转弯；speak sharply 严厉地说 词根词缀：sharp(锋利)+-ly(副词后缀) 例句：The temperature dropped sharply la.st night. 昨晚气温急剧下降。 10 symbol 释义：n.象征；符号 /'smbl/ 词形变化：symbolic(adj.象征性的)；symbolize(w.象征) 搭配：a symbol of…的象征 词根词缀：sym-(共同)+bol(投掷)→投在一起比较→符号 例句：The dove is a symbol of peace. 鸽子是和平的象征。 11 represent 释义：v.代表：象征：描绘 /reprI'zent/ 词形变化：representation(m.代表，表现；representative(.代表； adj.代表性的) 搭配：represent sb..sth.代表某人/某物 词根词缀：re-(再)+present(呈现)→再次呈现→代表 例句：The red lines on the map represent roads,. 地图上的红线代表道路。 12 without hesitation 释义：毫不犹豫地 wr'δaut,hezI'teln/ 搭配：act without hesitation毫不犹豫地行动：say without hesitation毫不迟疑地说 例句：He jumped into the river to save the child without hesitation. 他毫不犹豫地跳进河里救那个孩子。 13 instead of 释义：代替，而不是 /m'sted av/ 搭配：instead of doing sth.而不是做某事 辨析：instead可单独使用位于句首或句末，instead of后跟名词/代 词/动名词 例句：Let's go swimming instead of watching TV, 我们游泳去吧，而不是看电视。 二、专项训练 (一)单句填空（用所给词的适当形式填空） 1.We should finish the work on (scheduled) 2.There are many (challenge)in our daily life. 3.He (promise)to come back before 9 o'clock last night. 4.Can you give me a quick (reply)? 5.She agreed without (hesitate). 6.1 (wonder)how to solve this problem. 7.Both sides (agree)to sign the contract yesterday. 8.The company is (current)developing a new product. 9.The price of oil rose (sharp)last month. 10.The Great Wall is a (symbol)of China. 11.The flag (represent)our country. 12.He took the medicine (with)hesitation and saved the patient. (二)短文填空（用所给词的适当形式填空，每空一词） Dear Tom, I'm writing to tell you about my new school life.Everything is busy but exciting.My daily 1. (scheduled)is very full.The biggest 2.(challenge)for me is math But I 3. (promise)to work harder.When the teacher asks questions,I always 4. (reply)quickly.I never show 5.(hesitate)in class.Sometimes I 6. (wonder)if I can catch up with others.My classmates are friendly.They always (agree)to help me.8.(current),I'm preparing for the exam.The scores have 9. (sharp)improved.I think the school is a 10. (symbol)of hard work.Everyone here 11. (represent)the spirit of never giving up.I will keep studying hard 12. (instead)of wasting time. Best wishes, Li Hua (三)短文选词填空（用方框中所给单词的适当形式填空，使短文完整正确。每个单词限 用一次，每空限填一个单词。) 方框词汇：schedule,challenge,promise,reply,hesitation,wonder,agree,currently, sharply,symbol,represent,without hesitation,instead of Last month,our class held a meeting to discuss how to help wild animals.The teacher asked us to make a 1. for the action plan.The biggest 2. was how to raise money.I 3. to collect old books and sell them.Everyone 4. with me. 5. we are preparing for the charity sale.The price of second-hand books will drop 6. to attract buyers.The panda,a 7.of endangered animals,8. the need for protection.When the teacher asked who would be the leader,I stood up 9. Some students 10. if they could join.We replied 11. giving excuses.We all decided to work hard.12. of complaining,we took action. (四)完成句子（根据所给汉语意思，用单词或短语完成下列英文句子） 1.请按日程表完成这项任务。 Please finish the task 2面对挑战时，我们要勇敢 When we we should be brave. 3他承诺每天练习英语口语。 He English speaking every day. 4请尽快回复我的问题。 Please my question as soon as possible. 5.他毫不犹豫地跳进了河里。 He jumped into the river 6我想知道他为什么缺席了会议。 he was absent from the meeting. 7我们一致同意这个计划。 We all the plan. 8.目前他正在一所新学校学习。 he is studying in a new school. 9房价在最近几年急剧上涨。 House prices have risen in recent years. 10.鸽子是和平的象征。 The dove is peace. 11.这些颜色代表不同的季节。 These colors different seasons. 12.他选择了步行，而不是坐公交车。 He chose to walk taking a bus. 三、参考答案 (一)单句填空 1.schedule 2.challenges 3.promised ;4.reply ;5.hesitation 6.wonder 7.agreed 8.currently ;9.sharply 10.symbol 11represents 12.without (二)短文填空 1.schedule ,2.challenge ;3.promise 4.reply 5.hesitation ;6.wonder 7.agree 8.Currently ;9.sharply 10.symbol 11.represents 12instead (三)短文选词填空 1.schedule 2.challenge 3.promised 4.agreed 5.Currently 6.sharply 7.symbol 8.represents 9.without hesitation 10.wondered 11.instead of;12.Instead (四)完成句子 1.on schedule ;2.face a challenge 3.promised to practice ;4.reply to ;5.without hesitation 6.wonder why 7.agreed on agreed to 8.Currently ;9.sharply 10.a symbol of;11represent;12.instead of