Unit 8 Section A Grammar Focus - 4c 课件 2022-2023学年人教版英语八年级下册

Unit 8 To learn the present perfect tense with already and yet. -- Have you decided which book to write about yet? -- Yes, I have. I’ve already finished reading it. It was really good. 等候 赶快(做某事) 不久之后 放弃 wait for hurry up not long after that give up Translate and write them down. 新课导入 1.你读过《小妇人》吗？不， 我没有。 Have you read Little Women yet? No, I haven’t. 2. Tina读过金银岛吗？是的，她读过。 Has Tina read Treasure Island yet? Yes, she has. 3. 我已经读完了《金银岛》。 I have already finished reading Treasure Island. 4. 至少你已经读过书的结尾，了解了它的大致内容吧。 Have you at least read the back of the book to see what it’s about? 5. 我带回了许多我可以用的东西。 I’ve brought back many things I can use. Translate the following sentences 5. 我带回了许多我可以用的东西。 I’ve brought back many things I can use. 6. 虽然我失去了所有，但没有丧生。 Although I have lost everything, I have not lost my life. 7. 我已经砍到了树木并建造了一所房子。 I have already cut down trees and built a house. 现在完成时 1. 构成：“助动词have / has + 动词的过去分词” 2.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）。 2025 learning 8 years have learned English 2012 started learning English I started learning English in 2012. I am learning English these days. I have learned English for 8 years. （一般过去时） （现在进行时） （现在完成时） 3.结构： 1.肯定句：主语 + have/ has + 过去分词+... 2.否定句:主语+haven’t ( have not) +过去分词… 主语+hasn’t ( has not ) +过去分词... 3.疑问句:Have / Has+主语+过去分词...? I have finished my homework. I haven’t finished my homework. Have you finished your homework? 4.常见标志词： 1.already / yet 2.ever / never 3.just / before / up to now / in the past years/ so far already一般用于肯定句；yet用于否定句和疑问句。 多用于否定句和疑问句中，意为“曾经”；“从未”。 5.过去分词的规则变化和不规则变化： 规则变化 (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 5.过去分词的规则变化和不规则变化： 规则变化 (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 5.过去分词的规则变化和不规则变化： 不规则变化 A.过去分词与过去式形式一样（ABB型） hav