中学联盟江苏省昆山市鹿峰中学牛津译林版八年级英语下册课件：Unit1 Grammar(共24张PPT).ppt

* * * * * * * Grammar Unit1 Past and present 学习目标 1.掌握词汇：yet, recently, past 词组：learn more about, over the past century 2. 掌握现在完成时的基本结构、用法和动词过去分词的变化规律。 3. 能够在语境中正确运用现在完成时。 4.理解并运用常和现在完成时连用的时间表达方式。 Review 1. How long has Mr Chen lived in Sunshine Town? 2. What has the government done to part of the town centre? 3. Why does Mr Chen think it is impossible to see his old friends as often as before? He has lived there since he was born. The government has turned part of the town centre into a new park. Because most of his old friends have moved away. Present perfect tense 1. I have lived here since I was born. 我自从出生就一直居住在这里。 过去发生的动作一直延续到现在，有可能继续延续下去。 2. Eddie has eaten my food. 埃迪吃了我的食物。 过去发生的动作，对现在造成影响。 3.I have already read this book many times. 我已经看过这本书很多次了。 某个动作迄今为止发生过多少次。 现在完成时定义 现在完成时定义三要素： 1.表示到现在为止已经完成或刚刚完成的动作。 2.一件发生在过去的事情对现在产生影响。 3.一个动作开始于过去，并持续到现在(也许还将持续下去)。 观察与思考 结论：现在完成时的肯定句结构为 ________________________________________ I have just eaten it. You have cleaned up the window. She/He/ has visited Beijing three times. It has slept three hours. 1 主语 + have/ has + 过去分词+... 结论：现在完成时的否定句结构为 ________________________________________ I have not just eaten it. You have not cleaned up the window. She/He/ has not visited Beijing three times. It has not slept three hours. 2 主语 + have not/ has not+ 过去分词+... —Have you eaten it? —No, I haven’t./Yes, I have. —Has she/he/ visited Beijing three times? —No, she/he hasn’t./Yes, she/he has. —Has it slept three hours? —Yes, it has./No, it hasn’t 3 3 结论：现在完成时的一般疑问句结构为 __________________________________ __________________________________ __________________________________ Have/Has+ 主语+过去分词+...？ 肯定回答：Yes, 主语+has/have. 否定回答：No, 主语+hasn’t/haven’t. 观察与思考 How long have you lived? What has she/he eaten for breakfast? What has the government done to part of the town centre? Where has she travelled recently? 4 结论：现在完成时的特殊疑问句结构为 ________________________________________ 特殊疑问词+have/has+主语+过去分词+... (1)一般动词，在词尾直接加“ ed ”。 work---worked-