英语人教版八年级下册Present perfect tense.doc

现在完成时米脂姬岔中学 高涛I.Teaching Objectives1.掌握现在完成时的用法与构成、标志词及句型结构2.掌握规则动词和不规则动词过去分词的变化3.学会自己寻找规律并总结知识点及语法结构II.Student Analysis八年级学生在已经掌握的一般过去时态的基础上过渡到现在完成时，并且对现在完成时的构成进行系统性地学习、巩固和提高。III. Teaching important and difficult points:Teaching important points:现在完成时的构成规则动词与不规则动词的变化Teaching difficult points:正确区分现在完成时与一般过去时IV.Teaching Procedures：Step1.Lead-inRead a poem and lead in？Step2.PresentationI.用法1. 表示过去发生或已经完成的某一动作对现在造成的影响或结果。 e.g. Have you had your lunch yet? Yes, I have. Ive just had it. (现在我不饿了。)2. 表示动作或状态从过去某一时刻开始，一直延续到现在，而且可能还要继续下去。e.g. Ive known Bob for three years.II.现在完成时的标志词1.already 已经（肯定句，句中）2.yet 已经（否定句及疑问句，句末）3.ever 曾经4.never 从未5.just 刚刚6.before 以前7.for+一段时间 （for two years）8.since+过去的时间点 （since2010）9.since+一般过去时从句（since he came here）III.构成：通过读句子，自己发现并总结规律“助动词have / has+ 动词的过去分词”1. 过去分词 规则动词a. 一般动词，词尾直接加-ed。pick picked picked; wish wished wishedb. 以不发音的e结尾的动词，只在词尾加d。like liked liked; hope hoped hopedc. 以“辅音字母 + y”结尾的动词，变y为i，再加-ed。study studied studied; hurry hurried hurried d. 词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。stop stopped stopped; clap clapped clapped2. 过去分词 不规则动词AAA型 cut-cut-cut read-read-readAAB型 beat-beat-beatenABB型 buy-bought-bought build-built-builtABA型 come-came-come run-ran-runABC型 do-did-done go-went-gone IV.句式1. 肯定句：主语 + have / has + 过去分词 (+ 其他)2. 否定句：主语 + have / has + not + 过去分词(+ 其他)3. 一般疑问句：have/ has + 主语 + 过去分词(+ 其他)4. 特殊疑问句：特殊疑问词 + have / has + 主语+过去分词 (+ 其他)V.中考链接1. Sanya is a nice city.I_there twice. have gone to(已经去过某地了，人不在这儿)A. have gone to B.have been to C.have come have been to(曾去过某地，已回来)2. Mary _in China five years ago.She_for five years.一般过去时表示动作发生在过去，强调的是过去的情况A. worked,worked B.has worked,worked C.worked,has worked现在完成时强调过去发生的动作对现在的影响3. They_this big house since they moved here.A. have had B.have bought C.bought熟记短暂性动词与持续性动词的转换1.buyhave 2.borrowkeep 3.beginbe ebe in 5.diebe dead 6.joinbe in7.leavebe awayStep3.Exercise:1. Write the forms of the past tense and past participle: drink _ _ see_ _ find _ _ leave _ _ tell _ _2. Choose the best answer.(1). Have you taken out the trash, Belly? _. Ill do it right away. A. Sorry, I have B. No, I didnt C. No, I dont D. Not yet(2). Have you _ visited Shanghai? No, _. A. ever; not B. never; not C. ever; never D. never; ever(3). Could you go to the park with me this afternoon? Sorry, I _ there. I went there yesterday. A. have gone B. have been C. went D. was (4). Have you washed your clothes _? No, I havent. But I have cleaned the room _. A. ago; already B. yet; yet C. before; yet D. yet; already（5）. I am a soldier. I _ the army _ about five years. A. have joined;