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课件网) 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 she come here yesterday Will you join in the party tomorrow 请问你有没有发现什么？ 疑问式: Have /Has + 主语 + 过去分词 答语: Yes, 主语 + have/has.(肯定) No, 主语 + haven’t/hasn’t.(否定) We have finished the work. 一般疑问句： 肯定回答： 否定回答： Have you finished the work Yes, we have. No, we haven’t. Tom has come back home. 一般疑问句： 肯定回答： 否定回答 ... ...
