Unit 3 Great Ideas Preparing for the topic 知识点讲解2026-2027学年仁爱科普版英语九年级上册

Unit 3 Great Ideas Preparing for the topic 课时1&2&3 第一课时 Listening & Speaking 1. 后缀 -en：名词变形容词（材质） 【教材原句】The chair is made of wood. It is a wooden chair. 【讲解】 后缀 -en 加在表示材质的名词后，构成形容词，表示“由……制成的；……质的”。 常见词：wood → wooden（木制的）；gold → golden（金色的；金制的）；wool → woolen（羊毛制的）；silk → silken（丝制的）。 注意：golden 除表示“金制的”外，还常表示“金色的；珍贵的”，如 a golden opportunity（千载难逢的机会）。 拓展：-en 也可加在形容词后变动词，如 weak → weaken（使变弱）；wide → widen（加宽）。 【例句】 • This is a wooden table. 这是一张木桌。 • She has golden hair. 她有金色的头发。 • He wears a woolen sweater in winter. 他冬天穿羊毛衫。 【练习题】 1. 用所给词适当形式填空：The ______ (wood) desk is very old. 答案：wooden 2. 写出对应形容词：wood → ______；wool → ______ 答案：wooden; woolen 2. lock n. 锁；v. 锁上；锁住 【教材原句】Please check the lock before you leave. 【讲解】 lock 作名词，意为“锁；水闸”，常见搭配：under lock and key（妥善锁藏着）。 作动词，意为“锁上；锁住”，常见搭配：lock the door（锁门）；lock sth. away（把某物锁起来）。 派生词：locker（储物柜；寄物柜）；unlock（开锁；解锁）。 【例句】 • Don't forget to lock the door. 别忘了锁门。 • The lock is broken. 锁坏了。 • She locked her diary in the drawer. 她把日记锁在抽屉里。 【练习题】 1. 选择：Please ______ the door when you go out. A. lock B. locked C. locking D. to lock 答案：A 2. 翻译：出门前请检查门锁。 答案：Please check the lock before going out. 3. be made of / be made from / be made in / be made by / be made into / be made up of 【教材原句】The table is made of wood. Paper is made from wood. 【讲解】 be made of：由……制成（能看出原材料，物理变化），如 The desk is made of wood. be made from：由……制成（看不出原材料，化学变化），如 Paper is made from wood. be made in：在……制造（后接地点），如 This watch is made in Switzerland. be made by：由……制造（后接执行者），如 The cake was made by my mother. be made into：被制成……，如 Wood can be made into paper. be made up of：由……组成/构成，如 The team is made up of ten players. 【例句】 • The bridge is made of stone. 这座桥是石头造的。（看得出） • Wine is made from grapes. 葡萄酒是葡萄酿的。（看不出） • Our class is made up of 40 students. 我们班由40名学生组成。 【练习题】 1. 选择：The paper is made ______ wood. A. of B. from C. in D. by 答案：B 2. 用适当介词填空：This kind of car is made ______ Germany. 答案：in 4. be used for doing sth. = be used to do sth. 被用来做某事 【教材原句】The knife is used for cutting things. 【讲解】 be used for doing sth. = be used to do sth.，意为“被用来做某事”，是被动语态结构。 辨析：be used to doing sth.（习惯于做某事，to是介词）；used to do sth.（过去常常做某事）；be used as（被用作……）。 主动形式：use sth. for doing sth. / use sth. to do sth.（用某物做某事）。 【例句】 • Computers are used for working. 电脑被用来工作。 • Wood can be used to make paper. 木头可以用来造纸。 • He is used to getting up early. 他习惯早起。 【练习题】 1. 选择：The machine is used ______ the room. A. for clean B. for cleaning C. to cleaning D. clean 答案：B 2. 翻译：手机被用来和别人交流。 答案：Mobile phones are used to communicate with others. 第二课时 Function, Pronunciation 1. certainly adv. 无疑；当然；肯定 【教材原句】— Can you help me? — Certainly! 【讲解】 certainly 是副词，意为“当然；无疑；肯定”，在句中通常放在be动词、助动词之后，实义动词之前。 在口语中，certainly 可用来表示同意或肯定回答，相当于 of course / sure。 形容词形式为 certain，意为“确定的；无疑的”，常见句型：be certain that…（确信……）；be certain to do sth.（一定会做某事）。 辨析：certainly（当然，肯定）；surely（ surely 也表示“肯定”，但常用于美式口语）。 【例句】 • He will certainly come. 他一定会来。 • — May I use your pen? — Certainly. —我能用你的钢笔吗？—当然。 • I am certain that he is right. 我确信他是对的。 【练习题】 1. 选择：He ______ knows the answer. A. certain B. certainly C. certainty D. be certain 答案：B 2. 翻译：他一定会通过考试的。 答案：He will certainly pass the exam. 第三课时 Thinking Skills, Reading Strategies 1. support sb. in (doing) sth. 在做某事上支持某人 【教材原句】My parents support me in my decision to study abroad. 【讲解】 support sb. in (doing) sth. 意为“在（做）某事上支持某人”，in 是介词，后接名词或动名词。 support 作动词，还可表示“支持；拥护；供养；支撑”，常见搭配：support a family（养家）；support an idea（支持某个观点）。 作名词，意为“支持；帮助；支撑物”，常见搭配：give support to（给予支持）；with the support of（在……的支持下）。 派生词：supporter（支持者；拥护者）；supportive（支持的；给予帮助的）。 【例句】 • My teacher supports me in joining the competition. 老师支持我参加比赛。 • He has a large family to support. 他要养活一大家人。 • Thank you for your support. 谢谢你的支持。 【练习题】 1. 选择：My parents always support me ______ what I want to do. A. on B. in C. at D. with 答案：B 2. 翻译：我们应该支持他的决定。 答案：We should support him in his decision. 2. either…or… 要么……要么……；或者……或者…… 【教材原句】Either you or I am going to the party. 【讲解】 either…or… 意为“要么……要么……；或者……或者……”，连接两个并列成分，表示两者之一。 连接两个并列主语时，谓语动词遵循“就近原则”，即与最近的主语保持一致。 反义表达：neither…nor…（既不……也不……），同样遵循就近原则。 拓展：both…and…（两者都），谓语动词用复数；not only…but also…（不但……而且……），就近原则。 【例句】 • Either you or he is wrong. 要么你错了，要么他错了。 • You can either stay at home or go with us. 你要么待在家里，要么和我们一起去。 • Neither he nor I am interested in it. 他和我都对此不感兴趣。 【练习题】 1. 选择：Either Tom or his parents ______ going to attend the meeting. A. is B. are C. was D. has 答案：B 2. 翻译：你要么现在做，要么明天做。 答案：You can either do it now or tomorrow. 3. bring about 带来；引起；导致 【教材原句】The Internet has brought about great changes in our life. 【讲解】 bring about 意为“带来；引起；导致”，相当于 cause / lead to / result in，后接名词或动名词。 拓展短语：bring up（抚养；提出）；bring down（降低；击落）；bring in（引进；赚得）；bring out（出版；使显现）；bring back（带回；使回忆起）。 辨析：bring about（导致，及物短语）；happen（发生，不及物）；take place（发生，不及物）。 【例句】 • The new policy brought about many changes. 新政策带来了许多变化。 • What brought about the accident? 是什么导致了这起事故？ • Technology has brought about great progress. 科技带来了巨大进步。 【练习题】 1. 选择：The invention of the computer ______ great changes in society. A. brought up B. brought about C. brought in D. brought out 答案：B 2. 翻译：这场雨给庄稼带来了好收成。 答案：The rain brought about a good harvest for the crops. 1 学科网（北京）股份有限公司 $