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课件网) 人教新目标版 八年级下 Section A Grammar Focus-4c 现在完成时1公开课 Unit8 Have you read Treasure Island yet? A short video to understand the present perfect. Warming-up Have you read Little Women yet? Yes, I have./No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. Find the present perfect tense. Grammar Focus 你已经读过《小妇人》了吗? 是的，我读过。不，我没读过。 蒂娜已经读过《金银岛》了吗? 是的，她读过。她认为它是极 好的。 你已经决定选择写哪本书 了吗? 是的，我已经读完它了， 它真好。 Have you read Little Women yet? Yes, I have./No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. How is the present perfect tense formed? have/has + 过去分词 Have you read Little Women yet? Yes, I have./No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. What adverbs are often used with the present perfect? Already and yet. Have you read Little Women yet? Yes, I have./No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. 含现在完成时的句子如何构成一般疑问句？ 将助动词have/has放在主语之前。 现在完成时态（1） 一、现在完成时的基本结构 现在完成时由“助动词 have/has + 过去分词”构成，其基本句式结构为： ① 肯定句：主语 + have/has + 过去分词 + 其他. I have seen this film. ② 否定句：主语 + have/has not + 过去分词 + 其他. I have not seen this film. ③ 一般疑问句：Have/Has + 主语 + 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. — Have you seen the film? —Yes, I have. / No, I haven’t. 和主语一致 have not = haven’t; has not = hasn’t have/has 常可缩略为 -’ve/-’s 二、过去分词的构成 1. 规则变化（与动词过去式规则一样，此类称作规则动词） -ed 的读音规则： ① 在元音或浊辅音后读 [d] ② 在清辅音后读 [t] ③ 在[t][d]后读[id] (1)一般动词，在词尾直接加“ ed ”。 work--worked--worked (2)以“ e ”结尾的动词，只在词尾加“ d ”。 live--lived--lived (3)以“辅音字母 + y ”结尾的动词，将“y” 变为 “i”，再加“ ed ”。 study--studied--studied (4)重读闭音节结尾，末尾只有一个辅音字母，先 双写该辅音字母，再加“ ed ”。 drop--dropped--dropped 2. 不规则变化（此类称作不规则动词，有很多） 原形（不定式） 过去式 过去分词 be was/were been have had had choose chose chosen put put put run ran run 参看课本P136-137 Irregular Verbs（不规则动词表） 不规则动词看似很多，其实也有一些“规则”可循，比如可以分类记忆：有A→A→A型， A→B→B型， A→B→C型， A→B→A型； 部分单词有类似变化： 变元 ... ...
