Unit8重点知识讲解 2025-2026学年译林版八年级英语上册

译林英语八上Unit8重点知识讲解 一、核心单词 1. shout /ʃaʊt/ v. & n. 呼喊；喊叫 用法： 作动词：shout for help（呼救）；shout at sb（对某人大喊，含不友好态度）。 作名词：表“呼喊声”。 例句： He shouted for help when he fell into the river. Don’t shout at your parents. 2. voice /vɔɪs/ n. 嗓音；说话声；唱歌声 易混辨析： 易混词 用法及例句 voice 指说话声、歌声等：Her voice is very sweet. sound 指人能听到的任何声音：We heard a strange sound. noise 指噪声、喧闹声：Don’t make any noise in class. 例句： She spoke in a low voice. His voice shook with fear. 3. except /ɪkˈsept/ prep. 除……之外 易混辨析： 易混词 用法及例句 except 从整体中除去一部分：Everyone except me went to the party. besides 表示“除……之外还有”：We need three more people besides us. 例句： I like all fruits except bananas. He has no friends except me. 4. avoid /əˈvɔɪd/ v. 避免；防止 用法： 后接名词、代词或动名词，不能接动词不定式。 例句： We should avoid making mistakes. They avoid going out alone at night. 5. wound /wuːnd/ n. 伤；伤口 v. 使……受伤 用法： 作名词：表“伤口”。 作动词：表“使受伤”；形容词形式为 wounded（受伤的），the wounded 指“受伤的人”。 例句： First, clean the wound with water. The hunter wounded a deer. 二、重点短语 1. safe and sound 安然无恙 例句：Luckily, everyone was safe and sound after the accident. 2. put out 扑灭；熄灭 例句：Firemen put out the big fire after 16 hours’ work. 3. in fear 恐惧地；害怕地 例句：People ran out of the building in fear. 4. calm down （使）平静 例句：You should calm down and think carefully. 5. so far 迄今为止 例句：So far, 34 people have died in the accident. 三、核心句式 1. if 引导的宾语从句 句式结构：if 意为“是否”，与 whether 可互换；从句用陈述语序，时态与主句保持一致。 例句： I don’t know if he will come today. The little boy asked me if I knew the way to the park. 2. since 引导的原因状语从句 句式结构：since 意为“因为；由于”，表示双方都知道的原因，常位于句首。 易混辨析： 易混词 用法及例句 since 双方已知的原因：Since we are young, we shouldn’t be afraid of mistakes. as 明显的原因：As it was late, we went home. because 直接的原因，用于回答 why：He didn’t go to school because he was ill. 例句： Since you are tired, you can have a rest. 四、语法精讲 1. 过去进行时 ① 结构 was/were + 现在分词 ② 用法 表示过去某个时间点或时间段正在进行的动作。 常用时间状语：at this time yesterday, from...to..., when, while 等。 例句： I was reading a book when the phone rang. They were watching TV from seven to nine last night. 2. when, while, as 的用法 用法场景 选用词 例句 某一时间点 when/as It was raining hard when we arrived. 一段时间/两个动作同时进行 while He fell asleep while he was reading. 一边……一边…… / 随着 as As time goes on, things get better. 一个动作正在进行，另一个突然发生 when I was walking in the street when he called me. ( 1 ) 学科网（北京）股份有限公司 $