Unit 1 The changing world第4课时（Section A 4a-4c）课件 2026-2027学年人教版九年级英语上册

这是一份Unit 1 The changing world第4课时（Section A 4a-4c）课件 2026-2027学年人教版九年级英语上册，共26页。
Unit 1The changing world第4课时 (Section A 4a-4c)R·九年级上册Read the sentences about changes and fill in the blanks. He _______(become)a good friend of your grandfather about 20 years ago.They _____________(not, see)each other for ages!becamehaven’t seen We _______(use) to have to travel far to see a doctor.Our village _____________(build)a new hospital.usedhas (just) builtMany people _______(use) to work in big cities.Now, more of them _____________(come) back to live and work here.usedhave comeRead the sentences and circle the verbs. Pay attention to the verb tenses.He became a good friend of your grandfather 20 years ago.We used to have to travel far to see a doctor.Many people used to work in big cities.They haven’t seen each other for ages!Our village has just built a new hospital.Now, more of them have come back to live and work here.When do we use the simple past tense?When do we use the present perfect tense?一般过去时和现在完成时的用法和区别定义时间标志词句式结构一般过去时与现在完成时的区别动词结构一般过去时表示过去某个时间或某一段时间内发生的动作或存在的状态。定义nowPast future动词的过去式（did）动词结构一般过去时常见的时间状语有: yesterday（morning/afternoon）（昨天……）、last week/month/year（上周/上个月/去年）、一段时间+ago（……前）、the day before yesterday（前天）、in +过去的年份（在……年）、just now（刚才）when+从句时间标志词句式结构①含be 动词的一般过去时的句式主语+was/were+其他.主语+was/were not+其他.I was late for class this morning.I wasn’t interested in maths last year.Was/Were+主语+其他?Yes,主语+was/were.No, 主语+ wasn’t/ weren’t.疑问词+was/were（+主语）+其他?—Were you at home yesterday?—Yes, I was. /No, I wasn’t. How was your school trip?①含实义动词的一般过去时的句式主语+动词过去式+其他.主语+did not/didn’t+动词原形+其他.He visited a science museum last week.They didn’t play badminton last night.Did＋主语+动词原形+其他? Yes, 主语+did.No, 主语+ didn’t.疑问词+did+主语+动词原形+其他?—Did you go swimming yesterday? —Yes, I did. What did you do the day before yesterday?注意：若对主语提问，则特殊疑问句的句式为“疑问词+动词过去式+其他?”。助动词have/has+过去分词①表示过去发生或已经完成的动作对现在造成的影响或结果。②表示某一动作或状态从过去某一时间开始一直持续到现在，并有可能持续下去。定义nowPast future影响或结果构成现在完成时常见的标志词有: already（已经），yet（还；已经），never（从不），ever（曾经），just（刚刚），so far（到目前为止）for+时间段”或 since+过去的时间点/从句时间标志词主语+have/has+过去分词+其他.I have reviewed physics for the coming exam.主语+haven’t/hasn’t+过去分词+其他.I have not reviewed physics for the coming exam.句式结构Have/Has+主语+过去分词+其他?—Have you reviewed physics for the coming exam?—Yes, I have. /No, I haven’t. 疑问词（组）＋have/has＋主语＋过去分词＋其他?What have you reviewed for the coming exam?只表示过去的动作或状态，与现在无关表示过去发生的某一动作对现在造成的影响或结果，强调的是现在的情况常和already, yet, never, ever, just, so far, since, for等连用常和yesterday, last week, just now, two days ago等具体的表示过去的时间状语连用一般过去时与现在完成时的区别练习：用括号内所给内容的适当形式填空。1.Have you ever_________( try) Chinese food outside of China?2.He__________( prefer) country music to pop music when he was young.3.The film_________( be) successful with the public since it________( come) out.4. Tony ___________( have) the bike for two years. His father __________( buy) it for his ninth birthday.5. My sister ___________( not see) her friend for months. She__________(miss) her so much and wants to call her.triedperferredhas beencamehas hadboughthasn’t seenmissesComplete the conversation with the correct forms of the verbs in brackets.A:______ you______ (be) to the new library yet?B: No, I____________ (not know ) there was a new library. When did it ______ .(open)?A: It______ (open) last Friday. I ______ (go) there with my grandpa on Saturday night. B: ______ you______ (like)it?A: Of course! It’s the most high-tech library I______ ever______ (visit).Have beendidn’t knowopenopenedwentDo likehavevisitedB: Oh, what ______ you______ (see) there?A: There are sections with books about science and Chinese culture, as well as a huge section with children’s books. I also______ (read) some digital books on the computer. My grandpa________ (1isten) to some audio books because he can’t see well.B: Cool! I ____________ (bring)my little brother there tomorrow.didseereadlistenedwill bringComplete the passage with the correct forms of the verbs in brackets. Why are local people richer and happier than before?In the past, it______(be)difficult to travel in Guizhou. In many places, there used to_____ (be) no bridges to cross mountains and rivers, and most roads were just dirt tracks. This_______ (make) it difficult for locals to bring products to the market or to develop industry.wasbemadeIt’s+形容词(+for sb)to do sth.(对某人来说)做某事是……的。dirt /dɜː t/ [名词]泥土；尘土 track /træk/ [名词]小路；轨道Now great changes ________(take) place. The government_________(build) thousands of kilometres of highways,railways, and wide roads. It has also built many high bridges and tunnels. A journey that used to________(take) a day now takes only a few hours. As a result, the lives of local people________________(improve). They are much richer and happier than they once__________(be).have takenhas builttakehave improvedweretake place 发生；进行不及物动词短语，其后不接宾语。数以千计的；成千上万的隧道因此Why are local people richer and happier than before?Read and find out the answer It was difficult to travel in Guizhou. In many places, there used to be no bridges to cross mountains and rivers, and most roads were just dirt tracks. The government has built thousands of kilometres of highways, railways, and wide roads. It has also built many high bridges and tunnels. A journey that used to take a day now takes only a few hours. Review the grammar of this lesson and know how to use simple past tense and present perfect tense in different contexts correctly.Do some related exercises to consolidate.