Unit 8重点知识讲解-2025-2026学年冀教版英语八年级上册

冀教英语八上Unit 8重点知识讲解 Unit 8 Protecting the environment 一、单词用法讲解 1. recycle /ˌriːˈsaɪkl/ v. 回收利用；再利用 教材原句：I'll go throw this bottle in the recycling bin. → 替换例句：We should try to recycle these waste things. 用法解析 · 动词，由前缀 re-（重新）+ cycle（周期；循环）构成。 · 拓展：reuse（重复使用）、rewrite（重写）、restart（重新开始）。 例句 · Then it will be easier than ever for people to recycle and protect our environment. 2. harmful /ˈhɑːmfl/ adj. 有害的 教材原句：Such behaviour is harmful to the ocean and its creatures. → 替换例句：This is not only cruel, but also harmful to the environment. 用法解析 · 形容词，常用短语 be harmful to sb/sth（对某人/物有害）。 · 动词形式为 harm（伤害；损害），短语 do harm to...（对……有害）。 例句 · Eating cold food with beer does harm to the stomach. = Eating cold food with beer is harmful to the stomach. 3. waste /weɪst/ n. 垃圾；浪费 v. 浪费 教材原句：We use many plastic products only once or twice before they become waste. → 替换例句：Don't waste too much time in playing computer games. 用法解析 · 作动词，常用搭配 waste... (in) doing sth（浪费……做某事）。 · 作名词，常用句式 It's a waste of... to do sth（做某事是浪费……）。 例句 · It's a waste of time to talk something about the news. 4. pollute /pəˈluːt/ v. 污染；弄脏 教材原句：Plastic will stay in the ground for years and pollute the soil, water, and plants. → 替换例句：The smoke from the factory polluted the air. 用法解析 · 动词，名词形式为 pollution（污染；污染物），形容词形式为 polluted（受污染的）。 例句 · Windmills don't pollute the environment at all. 5. suffer /ˈsʌfə(r)/ v. 遭受；蒙受；受苦 教材原句：If our environment suffers, humans will do too. → 替换例句：Do you often suffer from headaches? 用法解析 · 常见搭配： ① suffer sth：受（苦、痛、损失等） ② suffer from...：受……之苦；因……而感到不舒服 例句 · The car suffered great damage in the accident. 6. hardly /ˈhɑːdli/ adv. 几乎不 教材原句：Around the late 1950s, you could hardly see a tree or a flower anywhere in Saihanba. → 替换例句：Linda spoke too quietly. I could hardly hear her at the back. 用法解析 · 频度副词，表示否定含义，用在系动词、助动词和情态动词之后，实义动词之前。 例句 · A zero-waste life is that people hardly create any rubbish. 7. complete /kəmˈpliːt/ v. 完成；结束 adj. 完全的 教材原句：The Saihanba Spirit inspired the foresters to complete the difficult task. → 替换例句：Teenagers are advised to complete tasks in time. 用法解析 · 作动词，指完成预定的任务、工程、建设等。 · 作形容词，意为“全部的；完全的”；副词形式为 completely（完全地；彻底地）。 例句 · Mike, your room is a complete mess. · I found I was completely wrong and said sorry to Mum. 8. effect /ɪˈfekt/ n. 影响；效果；结果 v. 引起；使发生 教材原句：The effects of global warming are serious. → 替换例句：The cold weather has a great effect on our life. 用法解析 · 作名词，常见短语： ① have... effect on...：对……有……影响 ② put... into effect：落实……；实施…… ③ take effect：开始起作用；产生效果 · 形容词形式为 effective（有效的），副词形式为 effectively（有效地）。 例句 · It won't be easy to put the changes into effect. · The new law will take effect next May. 二、重点短语讲解 1. be harmful to 对……有害 教材原句：Such behaviour is harmful to the ocean and its creatures. → 替换例句：Smoking is harmful to your health. 用法解析 · 固定短语，同义短语为 do harm to...。 例句 · Eating too much junk food is harmful to your body. 2. millions of 成千上万的 教材原句：Humans produce millions of tons of plastic every year. → 替换例句：There were millions of people there. 用法解析 · 表示约数，不与具体数字连用，后接可数名词复数。 · 拓展：hundreds of（数以百计的）、thousands of（数以千计的）、billions of（数以十亿计的）。 例句 · There are about nine million people in New York. 3. agree to do 同意做…… 教材原句：They explain the plan to their family members, and everyone agrees to help. → 替换例句：He agreed to go to the party with me. 用法解析 · 常见搭配： · agree to do sth：同意做某事 · agree with sb：同意某人的观点 · agree on sth：就某事达成一致 · agree to sth：赞同某事 例句 · I agree with your opinion. 4. the rest of 剩余的 教材原句：They spend the rest of the afternoon picking up bottles, plastic bags, and all kinds of garbage on the beach. → 替换例句：How do you spend the rest of the day? 用法解析 · rest 作名词，还可意为“休息；睡眠”。 例句 · She is tired and has a rest. 5. change... into... 把……变成…… 教材原句：In 1962, the local government decided to change this dead land into a forest. → 替换例句：We can change ice into water by heating it. 用法解析 · change 作动词，还可意为“改变”，短语 change one's mind（改变某人的主意）。 例句 · Will the school change in twenty years? 三、重点句式讲解 1. “sb spends time (in) doing sth” 句型 教材原句：They spend the rest of the afternoon picking up bottles, plastic bags, and all kinds of garbage on the beach. → 替换例句：Every time, they spend from 15 minutes to half an hour using different apps in iPads. 句式结构 · 意为“某人花时间做某事”，in 可省略。 · 拓展：sb spend(s) time/money on sth（某人在某事/物上花费时间/金钱）。 例句 · They also spend little on food or clothes to save their money for online games. 2. “Let's...” 句型 教材原句：Let's be part of the solution. → 替换例句：Let's play volleyball. 句式结构 · let's 是 let us 的缩写形式，意为“让我们做某事吧”，包括说话者和听话者双方。 · 易混：let us 只包括说话者一方。 例句 · Let's go for a walk. · Let us know the time of your arrival. 四、语法讲解 1. 祈使句 教材原句：Think about drinking bottles and plastic bags. 基本概念 祈使句表达说话人的劝告、叮嘱、请求或命令等，主语通常是第二人称，常省略。肯定祈使句通常以动词原形开头，句末用句号或感叹号。 类型 · Do型：Open the door, please. · Be型：Be quiet! · Let型：Let's fly a kite. 否定祈使句 · Don't+动词原形(+其他).：Don't run in the classroom. · Let+宾语+not+动词原形(+其他). / Don't let+宾语+动词原形(+其他).：Let the dog not go into the room. = Don't let the dog go into the room. · No+名词/动名词.：No photos. 2. 动词不定式作宾语补足语和目的状语 ① 作宾语补足语 · 动词不定式作 ask、want、tell 等的宾语补足语时，to 不可省略。 例：He asked me to talk about English study. · 动词不定式作使役动词 let、have、make 及感官动词 feel、hear、see、watch 等的宾语补足语时，to 要省略。 例：The teacher made him say the word like this. · 否定形式：在 to 前加 not。 例：My mother tells us not to fight. ② 作目的状语 · 动词不定式作目的状语时可放在句首或句末。 例：To carry out the task, the government organised a group of 369 foresters... 例：She arrived early to get a good seat. ( 1 ) 学科网（北京）股份有限公司 $