初中英语语法现在完成时精讲 (共63张PPT)

现在完成时 the Present Perfect Tense 现在完成时 助动词have (has)+过去分词done 二、现在完成时用法 过影响现 过持续到现在 两“去” I can’t find my pen. I have lost it. Have you finished it yet ? He has worked here for a year. I have been in this school since 1999 . He has been to China twice. He isn’t here. He has gone to the library. * * 1 2 1 2 1 2 陈述句 主+has/have + 过去分词+… Ha has worked for 9 hours .他已经工作九小时了 疑问句 Has/have+主+ 过去分词 +…? Has he worked for 9 hours?他已经工作九个小时了吗? 否定句 主+ has/have not+ 过去分词 +… He has not worked for 9 hours 他还没有工作九个小时 三、现在完成时时间标志词 have/has + V过分 1.持续 2.影响 时间标志词： already never ever just since+时间点 for+时间段 yet past now Yesterday , we cleaned the classroom. Now , the classroom is clean because we have cleaned it. 用法1 强调过去发生的动作对现在产生的结果或影响 1. My father bought many books for me yesterday . Now , I have a lot to read because ________________________________ 2. I saw this film last week. Now, I know this film because I_____________________. 3. I did my homewor