现在完成时教案一、引入:-Did you visit Beijing before? -Yes, I did. -No, I didn’t. Have you ever visited Beijing? Yes, I ________. No, I ________. Have you ever been to Beijing? Yes, I ________. No, I ________.二、定义:现在完成时表示到现在为止已经完成或仍在持续的动作、状态;强调对现在的影响或联系。三、 结构:have/has+p.p.(动词过去分词) 接触一:肯定句式 现在完成时的肯定句式是“have(has)+过去分词”。如: ① We have just finished our homework. ② She has gone home. 注意:1)该句式中的have或has是助动词,has用第三人称单数,其它人称一律用have。 2)该句式中have(has)和过去分词之间可用just插入。 3)把该句式译成汉语时,往往用“已经”、“”、“过”或“了”等。 接触二:否定句式:现在完成时的否定句式是“haven't(hasn't)+过去分词”。如: ⑥ We haven‘t studied Unit 2 yet. ⑦ The train hasn't stopped yet. 接触三:疑问句式 现在完成时的一般疑问句式是把助动词have或has提到主语之前。 ③ Have you read this story book yet? 特殊疑问句及反意疑问句结构如下: ④ What have you done with my bike? ⑤ You've read this story book, haven't you? 注意:1)现在完成时的一般疑问句往往在句末加yet。 2)把现在完成时的一般疑问句译成汉语时,往往译成“……过吗?”、“已经……了吗?”等。 3)其肯定回答用“Yes,...have(has).”,否定回答用“No,.haven't(hasn't).”,有时用“No,not yet.”或“No,never.”。 四、过去分词(规则+ed)1)Worked,visited,asked,played,stayed 2)liked lived moved3)stopped dropped robbed planned, preferred 4)carried,worried,tried |