公开课现在完成时.ppt

1、现在完成时,语法复习,Present Perfect Tense,saying: If winter has already come, can spring be far behind?,讨论,现在完成时的含义： 现在完成时的构成： 现在完成时态的标志词： Since 和 for的区别： Has been to 和 has gone to的区别： 现在完成时和一般过去时的区别：,现在完成时的含义,表示已完成的某一动作对现在造成的影响或结果 e.g. I have cleaned the classroom, so it is clean. 2. 表示从过去已经开始，持续到现在的动作 e.g.

2、 We have learned English since six years ago.,现在完成时的构成： have/has + 动词的过去分词,注：动词过去分词的构成分为规则变化和不规则变化， 规则变化的动词过去分词与过去式是一样的，不 规则变化的动词须特殊记忆。,A: Where have you ever been? B: Ive already/just been to .But I havent been toyet./ I have never been to.yet.,Tibet,Shanghai,Beijing,Hainan,pairwork,标志词:,already: y

3、et:,多用于陈述句，位于have/has后，有时位于句末。,e.g. I have already finished my homework.,用于疑问句和否定句，位于句尾。,e.g. Have you found your lost book yet ? I havent had breakfast yet.,ever : never:,多用于疑问句，问初次经历。,e.g. Have you ever been to Beijing?,用于否定句，位于have/has后,e.g. He has never argued with other people.,just : before:,多

4、用于陈述句，位于have/has后,e.g. Lucy has just washed her clothes.,e.g. I have read this book before.,用于各种句式，常放在句尾。,so far, once/twice/ three times ,all ones life in the past three years,e.g. They have learnt 2000 words so far. Tom has seen the film twice. Her father has worked in the factory all his life.,e.

5、g. They have built many high buildings in the past three years.,无标志词的：,e.g. He is not feeling well now. He has caught a cold. I have lost the key. I cant go into my room.,Since 和 for的区别：,1）for +一段时间e.g. We have lived in this city for ten years.,2） since +过去点时间 since +一段时间+ago since +从句（从句用一般过去式） e.g

6、. He has worked here since 1990. She has taught in this school since two years ago. We have known each other since we met.,How long用于对以上两个时间短语提问,for + 一段时间 since +过去时间点/句子(一般过去时）/时间段+ago,1.I have lived here_ I was born. 2. Bill has slept _ three hours and a half. 3. He has been away_ two days ago. 4

7、.We havent seen each other_ a long time. 5. Theyve watched TV play_ nine. 6. Its five years_ we met last time. 7. His parents have been dead _ several years.,since,for,since,for,since,since,for,注意：表示短暂动作的瞬间性动词，如come、go、buy等的完成时态 就不能与for、 since 等表示一段时间的状语连用，但可以与这类词 相应的延续性动词或短语连用。,瞬间动词的用法口诀；现在完成在瞬间，非延

8、只连时间点， 终止 须转换，否定方可碰一段 说明： 1 瞬间动词又叫非延续性动词或终止性动词，它可以有 现在完成时态，但不可以接一段时间；如果要接一段时间， 就必须把它转换成相应的延续性动词。 2 瞬间动词在完成时态中的否定式中可以接一段时间。,巧记10个瞬间性动词的转换 “,在现在完成时态中，短暂性动词不能持续，不能与for和since引导的时间状语连用，因此，得把短暂性动词转化为延续性动词短语。,1.I have bought the book for two years。改错 2.She has left since 2009。 3.I have borrowed the book si

9、nce two days ago.,I have had the book for two years.,She has been away since 2009.,I have kept the book since two days ago.,A:Oh, what fine weather! I enjoy lying on the beach. B: Me, too. Oh, where is Lucy? I havent seen her for a long time. Do you know where she is now? A: She has gone to Beijing.

10、 B: Oh, I see. A:Have you ever been to Shanghai? B: Yes. Now I live in Shanghai and I have been in Shanghai for two months.,小结,1. A: Wheres Jim, Li Lei? B: He _his school library. 2. The Greens _China for three years. 3. We _the Great Wall twice. Its very beautiful.,has gone to,have been in,have bee

11、n to,1. Jane has _ to BeiJing. She will come back tomorrow. A. been B. never been C. went D. gone 2. Hello, this is Mr. Green speaking. Can I speak to Mr. Black? - Sorry. He _ the Bainiao Park. A. has been to B. has gone to C. went to D. will go to 3. -_ you ever _ to the US? - Yes, twice. A. Have,

12、gone B. Have, been C, Do, go D. were, going,B,B,D,现在完成时和一般过去时的区别：,现在完成时，强调这一动作产生的结果对现在的影响，与现在有关。 一般过去时，仅仅表示在过去某一时刻曾发生过这一动作，与现在无关。,He has studied English for five years.,He studied English for five years.,（学习英语已经五年了，现在仍然在学）,（只说明他过去学过五年英语，但现在不学了。）,EXERCISE,He _(work) in our school for one year. He _(c

13、ome) to our school last year/in 2002. They _(cook) the supper already. They _ (cook) the supper half an hour ago.,has worked,came,have cooked,cooked,2. The famous writer _ one new book in the past two year . . is writing .was writing .wrote .has written,3.Our country _ a lot so far . Yes . I hope it

14、 will be even _ . . has changed ; well . changed ; good . has changed ; better . changed ; better,4.Harry Potter is a very nice film .I_ it twice . will see . have seen . saw .see,1. Have you met Mr Li _？ . just B. ago .before . a moment ago,C,5. These farmers have been to the United States . Really

15、 ? When _ there ? . will they go . did they go . do they go . have they gone,6. _ you _ your homework yet ? Yes . I _ it a moment ago . . Did ; do ; finished B. Have ; done ; finished . Have ; done ; have finished . will ; do ; finish,B,B,牛刀小试,1 What a nice watch ！How long _ you _ it？ Just three wee

16、ks A will，buy B did，buy C have ，had 2 you _in Greener China for a long time？ Yes，I joined it five years ago A Have，been B Has ，joined C Have ，joined 3 Teacher Li Japan，he_ Japan for two years A has been to，has been to B has gone to ，has been in C has gone to ，has been to 4 The students are sorry to

17、hear that the famous singer for half an hour A has left B has been away C has gone away 5 I this book for two days ，I have to return it now A borrowed B have borrowed C have kept,（C）,（A）,（B）,（B）,（C）,6-When you your old friend? -The day before yesterday. A will,visit B did ,visit C have ,visited 7 Mr

18、s White _ in this school since she came here. A teaches B taught C has taught 8 No children_ football in the street since a car hit a boy last Sunday. A have played B played C playing 9 -Im sorry to keep you waiting. -Oh,not at all,I _ here only for a few minutes. A was B have been C will be 10 His father since 1936. A died B has died C has been dead,（B）,（C）,（A）,（B）,（C）,Writing,Think about your favorite thing from childhood which you stil