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课件网) 现在完成时 Present Perfect Tense Unit 8 Have you read Treasure Island yet SectionA 目录 01 02 03 04 揭开现在完成时的神秘面纱 现在完成时与一般过去时：差异大揭秘！ 现在完成时构成与标志词学习探索 现在完成时句型运用与交流 01 揭开现在完成时的神秘面纱 开启现在完成时的学习之旅 现在完成时导入 Have you eaten breakfast Yes,I have. No,I haven't. Yes,I have. now past I have eaten breakfast . I ate breakfast just now. I needn't eat breakfast now. 影响 No,I haven't. now past I haven't eaten breakfast . I didn't eat breakfast just now. I need to eat breakfast now. 影响 现在完成时导入 Have you eaten breakfast Yes,I have. No,I haven't. 02 Unveiling the Mysteries of Present Perfect Tense 现在完成时构成与标志词学习探索 a. 一般直接在词尾加上ed。 look — looked—looked b.以不发音的e结尾的动词，直接加d。 move—moved—moved c.以辅音字母加y结尾的动词，改y为i,再加ed。 carry—carried—carried d.以一个辅音字母结尾的重读闭音节动词，双写 词尾最后一个辅音字母，再加ed。 stop—stopped—stopped 1）规则变化与动词过去式的变化规则相同 规则动词过去分词变化 2 规则动词过去分词变化 2 2）不规则变化，没有规律，需要记忆 AAA型 cut—cut—cut ABB型 bring—brought—brought ABA型 come—came—come ABC型 do—did—done AAB型 beat—beat—beaten 03 Now, Let's Master Present Perfect Tense in Conversations! 现在完成时句型运用与交流 I have already eaten breakfast. He has eaten breakfast. 观察：现在完成时的谓语结构是什么？ 主语 + have/has + done +其他 注意： have或has是助动词 has 用于第三人称单数， 其他人称一律用have。 现在完成时的构成 1 观察：现在完成时的肯定句如何变成否定句？ I have already eaten breakfast. I have not eaten breakfast yet. haven't She has eaten breakfast already. She has not eaten breakfast yet. hasn't 现在完成时的构成 1 在have/has后+not，缩写 为haven't /hasn't 观察：现在完成时的陈述句如何变成一般疑问句？如何作回答？ I have already eaten breakfast. Have you eaten breakfast Yes, I have./No, I haven't. She has had breakfast already. Has she already had breakfast Yes, she has./No, she hasn't. 现在完成时的构成 1 把助动词have/has放句首，其后照抄，句末“？” 回答用Yes,...have/has./ No,...haven't/hasn't. already 用于肯定句中或句末 yet 常用于否定句中和疑问句中 just 常用于肯定句中表示“刚才” I have already taught him some English. Bob hasn't gone to school yet. Have you had you lunch yet Mom has just cooked in the kitchen. already 、yet和just 都用在现在完成时句子中，但有什么区别？ （2）现在完成时的用法 用法 例句 表示过去发生的动作或已经完成的动作对现在造成的影响和结果。 -Have you had your breakfast yet -Yes,I have.I've just had it. -No,I haven't yet. already 用于肯定句中或句末 yet 常用于否定句中和疑问句中 just 常用于肯定句中表示“刚才” 04 现在完成时与一般过去时：差异大揭秘！ 深入探究时态区别与拓展应用 现在完成时与一般过去时：用法大不同 时态 时间 谓语 1. I have already eaten my breakfast. I ate my breakfast just now. 2.My mother has lived in Dali for a long time. My mother lived in Dali two years ago. 3.Have you ever read that b ... ...
