现在完成时 3课时课件 2023-2024学年仁爱科普版九年级英语上册

现在完成时 I 现在完成时的定义 现在完成时的基本句型认知 动词的过去分词 现在完成时 The Present Perfect Tense 定义: ①表示过去发生或已经完成的某一动作对现在造成的影响或结果。 I have opened the window already. ②表示开始于过去并持续到现在的动作或状态。 My grandma has lived in Zhangzhou for forty years. We They You 复数主语 2. 基本句型: 主语+助动词 have / has + 动词过去分词done + have done… 2. 基本句型: 主语+助动词 have / has + 动词过去分词done She He It 单数主语 + has done… 3. 动词过去式和过去分词的构成规则 规则变化: 原形 - 过去式 - 过去分词 allow – allowed - allowed look – looked - looked accept - accepted - accepted 直接加ed 3. 动词过去式和过去分词的构成规则 规则变化: 原形 - 过去式 - 过去分词 refuse - refused - refused use - used - used lived - lived - lived 以不发音的e结尾的动词直接加d 原形 - 过去式 - 过去分词 tidy - tidied - tidied study - studied - studied 以辅音加y结尾的动词,把y改为ied 原形 - 过去式 - 过去分词 chat - chatted - chatted stop - stopped - stopped prefer - preferred - preferred 以重读闭音节结尾的动词,双写辅音字母再加ed 2.不规则变化: cost cut hit hurt let cost cost cut cut hit hit hurt hurt let let A A A 型 原形 - 过去式 - 过去分词 2.不规则变化: A A B 型 beat 原形 - 过去式 - 过去分词 beat beaten become come run 原形 - 过去式 - 过去分词 A B A 型 became become came come ran run A B B 型 原形 - 过去式 - 过去分词 brought brought bought bought thought thought caught caught taught taught bring buy think catch teach was/were been did done went gone began begun drank drunk rang rung sang sung swam swum A B C 型 原形 - 过去式 - 过去分词 be do/does go begin drink ring sing swim 现在完成时 II 现在完成时的定义回顾 现在完成时的基本句型以及变化 练习 We They You 复数主语 基本句型回顾===Who can tell us ? 肯定句:主语+助动词 have / has + 动词过去分词 She He It 单数主语 + has +过去分词… + have + 过去分词… 她已经走了。 She has gone. 他已经回来了。 He has come back. 我们已经做好了。 We have done. 否定句呢? 一般疑问句该怎么变呢? 肯定回答咋整? 否定回答咋整啊? 回想过去-一些时态的否定句 He doesn’t like swimming. She didn’t come here yesterday. We won’t join in the party tomorrow. 请问你有没有发现什么? 否定式: 主语 + haven’t (have not)/ hasn’t (has not) + 过去分词 否定句:主语+haven’t / hasn’t + done… She has worked out the math problem. 否定句: She hasn’t worked out the math problem. They have had some bread. 否定句: They haven’t had any bread. 疑问式: Have /Has + 主语 + 过去分词? 能顺道想出它的肯定回答和否定回答吗? 回想过去-一些时态的疑问句 Does he like swimming? Did sh