Unit5 Section A(4a-4c) 2026-2027学年人教版英语九年级上册

Power of Ideas Unit 5 Section A (4a-4c) Grammar Time Travel Route Now let’s begin our journey. Game rule: We will stop at four moments in history. At each stop, guess the invention. Time Travel Route ⭐It was invented in 1876. ⭐ It was invented by Alexander Graham Bell. ⭐ It is used to talk with people far away. What is it? Telephone 1876 Bulb √ Time Travel Route ⭐ It was developed in 1879. ⭐ It is used when it is dark. ⭐ Houses can be lighted with it. What is it? Bulb 1879 Telephone TV √ Time Travel Route ⭐ It was invented in 1895. ⭐ News, music and other programs can be heard through it. What is it? Radio 1895 TV √ Time Travel Route ⭐ It was invented in 1983. ⭐ It was invented by Chuck Hull. ⭐ It is used to make almost everything under the sun.. What is it? 3D printer 1983 Lead in --- Read the sentences together. What kind of sentences are they? It was invented in 1876. It is used to talk with people far away. It was developed in 1879. Houses can be lighted with it. News, music and other programs can be heard through it. Pictures and sounds can be shown on it. It is used for watching shows. （被动语态） be done What do you know about the passive voice? 被动语态的含义 语态 在英语中有两种语态，即主动语态 the active voice 和被动语态 the passive voice。 主动语态 被动语态 Marconi invented the radio. The radio was invented by Marconi. 发明 被发明 主语是动作的执行者 主语是动作的承受者 4a Read the sentences. Circle the verbs in the passive voice. A mini-camera is connected to the front of the glasses. The oil and salt are also added by the machine itself. Toys, chairs, tables, and even houses can all be made by the 3D printer. A radio message was sent across the Atlantic Ocean for the first time in 1901. 一般现在时态的被动语态 含情态动词的被动语态 can be done 一般过去时态的被动语态 Passive voice of different tenses. A B C ( ) 1. A lot of trees ______ every year. A. plant B. were planted C. are planted 一般现在时 Passive voice of different tenses. ( ) 2. The letter ______ by my sister yesterday. A. is written B. was written C. wrote 一般过去时 A B C Passive voice of different tenses. ( ) 5. Students ______ to follow the school rules. A. must ask B. must be asked C. must be ask A B C 含有情态动词 Presentation 过去分词的构成 Look and say 1. 规则变化（与动词过去式规则一样，此类称作规则动词） play → _______ → _______ walk → _______ → _______ use → _______ → _______ like → _______ → _______ study → _______ → _______ cry → _______ → _______ stop → _______ → _______ plan → _______ → _______ played played  walked walked  used  used liked liked studied studied cried cried stopped stopped 一般情况下直接 + ed 以不发音e结尾的直接+ d planned planned 以辅音字母+y结尾的，变y为i加-ed 以重读闭音节“辅元辅”结尾的， 双写末尾字母，再+ed Presentation 被动语态的构成 Look and say 2. 不规则变化（不规则动词） put → _______ → _______ cut → _______ → _______ read → _______ → _______ cost → _______ → _______ drink → _______ → _______ begin → _______ → _______ sing → _______ → _______ put put cut cut read read drank drunk began begun sang sung 原形、过去式、 过去分词拼写一致 原形（含字母i）—过去式（i变a）—过去分词（i变u） cost cost Presentation 被动语态的构成 Look and say 2. 不规则变化（不规则动词） try → _______ → _______ teach → _______ → _______ think → _______ → _______ bring → _______ → _______ tell → _______ → _______ catch → _______ → _______ tried tried taught taught brought brought told told thought thought caught caught 过去式和过去分词拼写一致 Presentation 被动语态的构成 Look and say 2. 不规则变化（不规则动词） know → _______ → _______ grow → _______ → _______ throw → _______ → _______ see → _______ → _______ write→ _______ → _______ go → _______ → _______ knew known grew grown threw thrown saw seen went gone wrote written 原形（词尾为ow / aw）—过去式（词尾变ew）—过去分词（词尾变own） 其它特殊情况 4b Complete the sentences with the correct forms of the verbs in brackets. The telephone ____________ (invent) by Alexander Bell in 1876. People all over the world ____________ (connect) to each other through the internet. The word “robot” ______________ (introduce) for the first time in a play in 1920. It wasn’t supposed to make such a loud noise when the button ____________ (press) to start the machine. It is believed that the world’s oldest wheel ____________ (find) in Eastern Europe. was invented are connected was introduced was pressed was found /səˈpəʊz/ v. 认为;推断 /wiːl/ n. 轮子;车轮 /ˈiːstən/ adj. 东方的;东部的 be (not) supposed to do/be sth (不)应当... It is believed that... 人们认为/大家相信... 被动语态的用法 当说话者不知道动作的执行者或没有必要指出动作的执行者时，只需要强调动作的承受者，可以使用被动语态。 1. 汽车于1885年被发明。 The car was invented in 1885. 2. 飞机被用来进行长途旅行。 Planes are widely used for long-distance travel. 3. 智能手机被全世界数百万人使用。 Smartphones are used by millions of people around the world. 需要在被动语态中指出动作的执行者时可用介词by引出 English is spoken by many people. Many people speak English. Conversion(转换) between active voice and passive voice. 主语(执行者) 谓语(主动语态) 宾语(承受者) 主语(承受者) 谓语(被动语态) 宾语(执行者) 助记口诀：宾变主，谓变be done，主变 by宾，可省去。 Presentation Look and fill 将这些句子改为被动 Football __________ by them on Sunday. 2.They used computers in class yesterday. Computers _____________ by them in class yesterday. Memory skills _________________________ by us every day. 1.They play football on Sunday. 3.We should practise memory skills every day. is played were used should be practised 4c Complete the passage with the correct forms of the verbs in brackets. Make a profile of the Qinghai–Xizang Railway. What is the passage mainly about? It’s mainly about the Qinghai-Xizang Railway. How much do you know about this railway? Read and complete The Qinghai–Xizang Railway was completed in 2006. It ____________ (connect) Xining to Lhasa, a huge distance of 1,956 kilometres, and it is the highest railway in the world, reaching 5,072 metres above sea level at Tanggula Pass. The building of the railway was a great challenge. Creative ideas ____________ (need) to solve different problems. In summer, the top layer of the frozen ground would melt and become too soft to build on, so pipes _________ (use) to keep the ground hard. However, in some places, it was impossible to build the railway over the frozen ground, so tunnels had to _________ (create) instead. In some other places, bridges _________ (build) to keep the railway up above the ground. These bridges are animal-friendly and ______ (allow) animals to pass under the tracks. As an important and successful project, the railway has ____________ (increase) tourism and economic development in the area. The lessons learnt and experience gained from building this railway will help ____________ (improve) transport in other similar places in the world. /ˈleɪə(r)/ n. 层;表层 /ˈfrəʊzn/ adj. 冰封的;冻硬的 /melt/ v. (使)融化;熔化 /paɪp/ n. 管子;管道 /ˈtʊərɪzəm/ n. 旅游业;观光业 /ˌiːkəˈnɒmɪk/ adj. 经济的;经济学的 /ɡeɪn/ v. 获得;得到;收获 Presentation Read and complete 4c Complete the passage with the correct forms of the words in brackets. Make a profile of the Qinghai–Xizang Railway. The Qinghai–Xizang Railway was completed in 2006. It ____________ (connect) Xining to Lhasa, a huge distance of 1,956 kilometres, and it is the highest railway in the world, reaching 5,072 metres above sea level at Tanggula Pass. The building of the railway was a great challenge. Creative ideas ____________ (need) to solve different problems. In summer, the top layer of the frozen ground would melt and become too soft to build on, so pipes ____________ (use) to keep the ground hard. However, in some places, it was impossible to build the railway over the frozen ground, so tunnels had to ____________ (create) instead. In some other places, bridges ____________ (build) to keep the railway up above the ground. These bridges are animal-friendly and ____________ (allow) animals to pass under the tracks. As an important and successful project, the railway has ____________ (increase) tourism and economic development in the area. The lessons learnt and experience gained from building this railway will help ____________ (improve) transport in other similar places in the world. connects were needed were used be created were built allow increased (to) improve allow sb to do sth 允许某人做某事 help (to) do sth 有助于做某事 connect A to B 把...与...连接 Great ideas can help us beat difficulties and create wonders.伟大的想法能帮助我们战胜困难，创造奇迹。 Exercise --- Translate the phrases. 被用来做某事 被连接到…… 人们相信…… 应该 / 应当做某事 把 A 和 B 连接起来 be used to do sth. be connected to … It is believed that … be supposed to do sth. connect A to B 用方框中所给词语的适当形式填空，每词仅用一次 Today, Chinese inventions like shared bikes are known ________. We walked carefully on the ________ ground because it was covered with ice. Heilongjiang is in the______________ part of China Ken hasn’t taken part in any activities since last term, because his project should ____________ in one year. The microwave (微波炉) is __________ to be a cooking tool, and it is used for many different purposes. You will _________ a lot if you keep working hard. frozen all over the world eastern be completed complete suppose frozen gain eastern all over the world supposed gain 懒人笔记资料库制作,资料已申请版权,请认准懒人工作室购买,请勿侵权,请勿私自传播,谢谢!!! 公众号:懒人笔记资料库 wx助理号:lanrenbiji456/13540328504 27 Summary Example: A radio message was sent across the Atlantic Ocean in 1901. Homework Find more information about the Qinghai-Xizang Railway and share it with the class Must-do Choose-to-do 1. Take notes of passive voice and recite the past participles of irregular verbs. 2. Write a short passage about an invention you like, using the passive voice. 懒人笔记资料库制作,资料已申请版权,请认准懒人工作室购买,请勿侵权,请勿私自传播,谢谢!!! 公众号:懒人笔记资料库 wx助理号:yyyz1168 $