中考英语一般现在时专项讲解.docx

课堂内容一般现在时用法和构成内容重点构成和单三变化规律内容难点单三变化规律1. 一般现在时的用法用法例句表示经常性、习惯性的动作或存在的状态。常与频度副词连用。I often take a walk in the park.These T-shirts are new.表示客观事实、真理。The sun rises in the east and sets in the west标志性词：1.every系列:day,year,month,week,morning,afternoon,evening2.频率副词:neverseldomrarelysometimesoftenusuallyalways2. 次数oncetwicehree timestwice a weekfour times a weekon Saturdays2.一般现在时构成基本结构：主语+动词原形（do)+其他注意：若主语为第三人称单数，一般在动词原形后加-s或-es。情况构成方法例词一般情况readreads loveloves以s，o，x，ch，sh结尾（ (小子吃寿司）passpasses boxboxesteachteaches washwashes以辅音字母 + y结尾carrycarries studystudies不规则变化havehas beam/is/are什么是第三人称单数？第三人称单数举例1.人称代词he, she, itHe/She _(like)watching TV. It_（look) a cat.2.单个人名、地名或称呼作主语Han Mei _(look) like her mother. Beijing_(be) in China.Uncle Wang often_(make) cakes.3.单数可数名词或"this/that/the+单数可数名词"作主语时3. A horse _(be) a useful animal. This book_(be) yours.That car _(be) red.The cat_(be) Lucys.4.不可数名词作主语时The milk_(be) in the glass. 5.当数字或字母作主语时"6" _(be) a lucky number. 练一练：（1） We often _ (play) on the playground.（2） He usually _ (get) up at six oclock.（3） There _ (be) a football match on TV every morning.（4） Daniel and Tommy _ (be) in Class One.（5） Sandy usually _ (play) the piano on Sundays.变为三单形式study _ run _ watch _ play _have _ eat _ look _ cry _wash _ pass _ 3.一般现在时的句子转换A.肯定句变为否定句l 情态动词和be动词后直接加not练一练：I could get you a book. I _get you a book.I am at home when you called me. I _at home when you called me.l 实义动词之前加 do not/dont，构成否定句。例如： The  singer sings some Chinese songs. The  singes dont sing any Chinese songs.B. 陈述句变为一般疑问句一提二改：be/情/助提前，第一人称改为第二人称，句号变问号。举例：I am a teacher. Are you a teacher?举例：He could read it . Could he read it ?l 实义动词：在主语之前添加助动词do/does，如果动词为三单，需要_Miss Zhang looks  very old. Does Miss Zhang look very old?练一练：I am a student.改为否定句：改为一般疑问句I could make cakes.改为否定句：改为一般疑问句He takes a shower at ten oclock 改为否定句：改为一般疑问句:家庭作业1. Before the sun _, we need to get to the top of the mountain.A. set B. sets C. is setting D. will set2. The weather report says that it _ tomorrow in most parts of Anshun city.If it _, the school sports meet will be canceled. A. will rain; will rainB. will rain; rainsC. rains; will rain D. rains; rains3. Gary is the best singer in my class. No one else _ so well.A. sings B. sang C. will sing D. is singing4. Do you think if Robert will go to the zoo tomorrow?I think he will go if he _ too much homeworkA. dont haveB. wont haveC. doesnt have5. I saw Toms father bought lots of books yesterday.Thats not strange. Not only Tom but also his father _ reading.A. enjoy B. enjoys C. enjoyed6. I will call you as soon as he _ here.A. arrive B. will arrive C. arrives D. arrived7. Your bedroom is so clean.Of course. It _ every dayA. cleans B. cleaned C. is cleaned D. was cleaned8. I dont know when he _ back. Please tell me when he _ back.A. comes; comes B. comes; will come C. will come; comes阅读理解Have you ever seen a solar panel(太阳能电池板) in your neighborhood? Solar panels take energy from the sun and turn it into electricity. Over the past ten years, the price of solar panels has gone down greatly. In many parts of the world, solar energy is now the cheapest form of electricity. More and more people have started using solar energy to power(给供电) their homes. However, solar panels also have their problems. They stop working at night and on rainy days. Is it possible to make them produce electricity all of the time?Scientists at Suzhou University, China, have invented a new solar panel now. It can produce electricity not only from solar energy but also from falling rain. When a raindrop falls on the solar panel and then rolls(滚动) down, it creates friction(摩擦力) on the surface of the panel, which can then be turned into electricity. Sun Baoquan is one of the inventors. “Our new invention can produce electricity in any weather during the day,” he says. “It can even provide electricity at night if there is a rain.”The solar panel, however, does not make much electricity from falling rain. So Sun Baoquan is still working hard to improve it. The scientist also wants to make soar panels more flexible, which are as soft as clothing.The field of solar energy is developing fast. Scientists around the world have been improving solar panels. Some have been working on ways to join solar panels and wind power together. Some have been trying to use sunlight to produce liquid and gas fuels(液体和气体燃料). 51. Which energy is now the cheapest form of electricity in many parts of the world? A. Solar energy.B. Water energy.C. Wind energy.52. What was one of the problems of common solar panels? A. The price of them is rising. B. They cant work all of the time. C. They can hardly power peoples homes.53. Why is the new solor panel more scientific and useful? A. It has a larger size than a common one. B. It produces more electricity from falling rain than solar energy. C. It can produce electricity day and night and even in rainy conditions.54. What does the underlined word “flexible” mean in Paragraph 5? B. 柔软的B. 光滑的C. 坚硬的55. We can infer(推断) from this text that _. A. there is no room for developing solar energy B. there is no end to research in the field of solar energy C. solar energy has completely taken the place of other kinds of energy学科网（北京）股份有限公司