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课件网) Grammar Present Perfect Tense Unit 5 Travel 学习目标 通过本节课学习，学生能够： 1.掌握现在完成时的基本结构和功能，理解其表示过去动作对现在的影响或持续状态的核心含义。（学习理解） 2.正确运用现在完成时的肯定、否定、疑问句式进行造句和转换，并能在具体语境中选择使用for或since；区分并正确使用have been to和have gone to表达不同的语义，避免常见错误。（应用实践） 3.在给定的情境中，综合运用现在完成时描述旅行经历或生活变化，完成真实的交际任务。（迁移创新） Contents Lead in 1 Presentation 2 Practice 3 Exercise 4 Summary 6 Homework 5 Lead in What do you notice You’ve grown one strawberry. Cheeky little birds have eaten all the rest. You’ve come to the right place. Have you picked a lot of strawberries Perhaps they have just eaten too many. They have just arrived at the strawberry farm. 现在完成时 结构： have/has + done (过去分词) 现在完成时 Presentation 定义1： 表示从过去开始并延续到现在，可能还将延续下去。 eg: a) He has lived here for ten years. 他在这里已经住了十年了。 b) I have been a teacher since 2015. 我从2015年起就当老师了。 现在完成时 Presentation 定义2： 表示过去发生的某一动作对现在造成的影响或结果。 eg：a) Have you seen that movie yet 你看过那部电影了吗？ 询问过去的经历对现在认知的影响。 b) We have never been to Beijing. 我们从未去过北京。 过去的经历 → 对现在的影响：我们现在对北京不熟悉。 现在完成时的构成 Presentation 1.肯定句： eg：a) I have finished my homework. 我已经做完作业了。 b) She has seen that movie three times. 那部电影她已经看了三遍了。 结构：主语+have/has + 动词的过去分词(+其他). 现在完成时的构成 Presentation 2.否定句： eg：a) I have not (haven't) finished my homework yet. 我还没做完作业。 b) He has not (hasn't) seen the new teacher. 他还没见过新老师。 结构： 主语 + have not (haven't)/has not (hasn't) +动词的过去分词 (+ 其他). 现在完成时的构成 Presentation 3.一般疑问句： eg：Have you finished your homework —Yes, I have. / No, I haven't. 结构：Have/Has + 主语 +动词的过去分词 (+ 其他) 肯定回答:Yes，主语 +have/ has. 否定回答:No，主语+haven't/ hasn't. 现在完成时的构成 Presentation 4.特殊疑问句： eg：a)Where has she gone 她去哪儿了？ b) How long have you lived here 你在这里住多久了？ 结构： 特殊疑问词 + have/has + 主语 +动词的过去分词 Rewrite the following sentences. 1.She has already booked the flight tickets. (改为一般疑问句) 2.They have visited the Great Wall. (改为否定句) 3.I have lived in Shanghai for ten years. (对划线部分提问) 4.He has worked in the company since he graduated. (改为一般疑问句) 5.Have they told you the news (肯定回答) Has she booked the flight tickets yet They haven’t visited the Great Wall. How long have you lived in Shanghai Has he worked in the company since he graduated Yes, they have. Practice 动词的过去分词的构成 Presentation 1.规则动词的变化规则 （1）大部分动词在词尾直接加 -ed work → worked ask → asked play→ played （2）动词以不发音的字母e结尾时，直接加 -d move → moved use → used love → loved （3）动词以“辅音字母+y”结尾时,变y为i再加 -ed ... ...
