英语人教版八年级下册Unit 8 Grammar.ppt

1、Unit 8 New Lesson Have you read Treasure Island yet?,SectionA Grammar,When?,What?,How?,Present Perfect Tense,What?,定义/结构,标志性词语,运用,Teaching goal (教学目标),句式,Read the sentences,（1） Little teachers,（2） In groups,预习展示,1.Have you read Treasure Island yet? 2. I have already read Treasure Island. 3. He has e

2、ver seen this film. 4.Tom has never heard of the story before . 5. She has just bought a book. 6.We have already studied in this school for 2 years. 7.Ms. Shu has taught us since 2012. 8.I have been to Shanghai three times.,小组探究1,（1）以下句子的结构是什么？,（2）时间标志词语有哪些？,（3）already, yet的区别？,仔细观察以下句子，回答问题。,1.Have

3、 you read Treasure Island yet? 2. I have already read Treasure Island. 3. He has ever seen this film. 4.Tom has never heard of the story before . 5. She has just bought a book. 6.We have already studied in this school for 2 years. 7.Ms. Shu has taught us since 2012. 8.I have been to Shanghai three t

4、imes.,（4）现在完成时的含义是什么？,主语+ _+_ (助动词) (过去分词) ,句子结构：,have/has,P.P. (V-ed / done),时间标志词：,already/ yet 的区别：,already, yet, ever, never, just, before, since， times(次数)，for+时间段，.,already：用于肯定句；,含义：,表示过去发生的动作对现在造成的影响。,yet：用于否定句或一般疑问句。,小组探究2,1.I have read Journey to the West. 2.She has already finished his ho

5、mework. 3. I havent read this book yet. 4. Tom hasnt heard of the story . 5. A:Have you ever seen this film? B:Yes, I have./No, I havent. 6. A:Has she just bought a book? B:Yes, she has./No, she hasnt.,仔细观察下列句子: 1.它们是什么句式？（肯定句、否定句、一般疑问句）,2.现在完成时的句型结构归纳 （肯定句、否定句、一般疑问句及其肯定、否定回答）,现在完成时的句型结构归纳 1.肯定式： 主语

6、+_+ done (动词过去分词)+其他 2. 否定式： 主语+_+ done (动词过去分词)+其他 3. 一般疑问句式及回答： _ +主语+ done (动词过去分词)+其他 肯定回答: Yes,主语+ have/has. 否定回答: No, 主语+ havent/hasnt.,havent / hasnt,Have / Has,have / has,work-worked/ pass-passed/visit-visited/ start-started likeliked/livelived/ die-died/ taste-tasted study-studied/cry-cried

7、 stop-stopped/ drop-dropped read-read/ teach-taught/dig-dug,1. 动词的过去分词的有几种变化?,小组探究3,仔细观察下列词语：,2. 规则变化的变化规则是什么?,*动词的过去分词的规则变化与过去式相同，在动词后加-ed，规则变化有以下四种：. 一般情况，直接_ . 词尾是e时，直接_ . 若词尾为“辅音字母+y”，_ . 末尾只有一个辅音字母的重读闭音 节,_,动词过去分词的规则变化,+ed,+d,变y为i+ed;,双写末字母+ed.,Exercises,请用have/has填空 1.I _ already read Snow Whi

8、te. 2.We _ known him for two years. 3.She _ lived here since 2000. 4._you finished your work? 5._Nancy ever been to Beijing?,have,have,Have,has,Has,【句型巩固】 1He has already gone to New York.(变一般疑问句并回答) _he_to New York_? No,he_. 2We have learned English for two years(变否定句) We _ _ English for two years

9、3. We have lived here for two years.(对划线部分提问) _ _have you_here? 4.Tom has ever read the book. (变否定句) Tom has _ read the book. 5.Ms. Shu started to teach us 2 years ago.(同义句) Ms. shu _ _us for 2 years.,Has,gone,yet,hasnt,havent learned,How long,lived,never,has taught,【巩固提升训练】 1.Have you met Mr Li _？

10、.already . ago .yet . a moment ago 2.The famous writer _ one new book in the past two years . . is writing .was writing .wrote .has written 3.Zhao Lan _already _in this school for two years . . was ;studying .have; study. has ; studied. are ; studying 4.We _ Xiao Li since she was a little girl . . k

11、now . had known . have known . Knew 5.Harry Potter is a very nice film .I_ it twice . . will see . have seen . saw .see 6.These farmers have been to the United States . Really ? When _ there ? . will they go . did they go . do they go . have they gone 7._ you _ your homework yet ? Yes . I _ it a mom

12、ent ago . . Did ; do ; finished . Have ; done ; finished . Have ; done ; have finished . will ; do ; finish,拓展提升 现在完成时和一般过去时两种时态的区别 *1. 现在完成时: 表示的是过去的发生的动作对现在造成的影响和结果，强调的是现在的情况，所以_ (能/ 不能)和表示过去的时间状语连用。 *2. 一般过去时: 表示的是过去发生的动作或状态，和_不发生联系，它和表示_的时间状语连用。(过去/现在) 如：yesterday(), last (), () ago, in 1990。,不能,现在,过去,Sum up：Knowledge Tree,What have you learned about the Present Perfect Tense? (你所学到的现在完成时态),1. 定义/ 结构,2. 过去分词,3. 时间标志词,4. 句式变化,The Present Perfect Tense,5.现完、 一过的 区别,You have already done a very good job!,Written work Make a new conversation(use the present perfect tense ),Homework,Or