牛津译林版八年级英语下册Unit1Grammarppt课件.ppt

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1、Unit 1Past and present学科网，zxxk.fenghuangxueyiAnswer some questions about the conversation between Mr Chen and Millie.Model 1:Has Sunshine Town changed a lot?Yes,it has.Model 2:Have Mr Chen and his wife moved out of the town?No,they havent.Questions:1.Has the government built a new park?2.Have most o

2、f Mr Chens old friends moved away?3.Has it become impossible for them to see each other as often as before?Yes,it has.Yes,they have.Yes,it has.The Present Perfect Tense（现在完成时）（现在完成时）1.We use the present perfect tense to talk about an action that started in the past and continues to the present.e.g.I

3、 have lived here since I was born.She has worked in this factory for nine years.2.We use the present perfect tense to talk about an action that happened in the past and have a connection with the present.e.g.Eddie has just eaten Hobos food.(Eddie ate the food,and now Hobo has nothing to eat.)I have

4、already seen the film?(I saw the film in the past and now I still remember something about the film.)学科网，zxxk.fenghuangxueyi3.We also use the present perfect tense to talk about how many times an action has happened till now.e.g.I have already read this book many times.Mr Chen has been to the USA tw

5、ice.I/You/We/They have arrived.He/She/It has4.We make positive statements in the present perfect tense like this:5.We make negative statements in the present perfect tense like this:I/You/We/They have notarrived.He/She/It hashave not=havent has not=hasnt6.We ask and answer questions using the presen

6、t perfect tense like this:HaveI/you/we/theyarrived?Hashe/she/it Yes,I/you/we/theyhave.he/she/it has.No,I/you/we/theyhavent.he/she/it hasnt.7.We form the past participles of regular verbs by adding-ed,just as what we do to form the simple past tense of these verbs.Most verbs+edfinish finishedVerbs en

7、ding in-e+d change changedVerbs ending in a consonant+y -y+iedcarry carriedShort verbs ending in a vowel+a consonant double the consonant+edstop stopped8.We form the past participles of irregular verbs differently.Here are some examples.No changecomecome hurt hurtChange the vowelhold held win wonCha

8、nge the consonantlendlent build builtChange the vowel(s)and the consonant(s)catch caught keep kept forget forgotten tell toldOthersbe been have had fall fallen fly flowndraw drawn see seenThe following shows more examples of the past participles of some verbs.visit repair livemovetry studyfitplanvis

9、ited repaired livedmovedtried studiedfittedplannedhitputmeetmakesellgivewritethinkhitputmetmadesoldgivenwrittenthoughtWrite the past participles of the verbs below.borrow plan sayhope cry growmake send hitget watch enjoyborrowedhoped madegotten plannedcried sentwatchedsaidgrownhitenjoyedComplete the

10、 sentences below using the present perfect tense.1.They _(finish)their homework already.2.John _ never _(visit)China.3.Mr Li _(repair)over ten bicycles since Monday.4.We _(not see)each other for years.have finishedhas visitedhas repairedhavent seen5.My parents _(not come)back yet.6.Our teacher _(tea

11、ch)us a lot about the history of China.havent comehas taughtComplete the conversation.Use the correct form of the verbs in brackets.Millie:_ you _(see)any films recently,Sandy?Sandy:No,I havent.What about you?Millie:I _(see)one last Saturday.Sandy:Whats it about?Have seensawMillie:Its about the chan

12、ges in Beijing over the past century.From this film,I _(learn)more about Beijings past and present.Sandy:Oh,I think I _(hear)about the film.Do you plan to see it again?Millie:Yes,Id like to.have learnthave heard一、现在完成时的构成：一、现在完成时的构成：1.现在完成时的肯定句句型：现在完成时的肯定句句型：主语主语+have/has+过去分词过去分词e.g.He has lived in

13、 Beijing for ten years.I have finished my homework.2.现在完成时的否定句句型：现在完成时的否定句句型：主语主语+have/has+not+过去分词过去分词 e.g.I have not seen the movie yet.He hasnt been to Beijing since then.3.现在完成时一般疑问句的构成：现在完成时一般疑问句的构成：Have/Has+主语主语+过去分词过去分词?Yes,主语主语+have/has.No,主语主语+havent/hasnt.e.g.Have you finished your homewor

14、k yet?Yes,I have./No,I havent.havent=have not hasnt=has not Ive=I have Hes=He has二、用法：以下两种情况应用现在完成时二、用法：以下两种情况应用现在完成时1.过去发生的动作或状态一直持续到现在。过去发生的动作或状态一直持续到现在。e.g.He has lived here since he came to Nanjing.2.过去完成的动作，但强调这个过去完成过去完成的动作，但强调这个过去完成 的动作对现在有一定的影响或产生某种的动作对现在有一定的影响或产生某种 结果。结果。e.g.I have seen that

15、 film already.(I saw it in the past and now I can still remember something about the film.)一般过去时只用来表示过去发生了某一般过去时只用来表示过去发生了某 事，并不能表明对现在产生了什么影事，并不能表明对现在产生了什么影 响。响。e.g.He lost his mobile phone yesterday.他昨天丢了手机。他昨天丢了手机。(We dont know whether he has found it or not.)He has lost mobile phone already.他已经把手

16、机丢失了。他已经把手机丢失了。(He cant use it right now.)三、判断方法：三、判断方法：1.依据用法，结合句意判断。依据用法，结合句意判断。e.g.他在这所学校教书有三年了。他在这所学校教书有三年了。He has taught at this school for 3 years.2.依据一些副词或时间状语判断。依据一些副词或时间状语判断。现在完成时常和现在完成时常和already,ever,just,never,recently,yet等副词，以及等副词，以及since,for引导的时间状语连用。引导的时间状语连用。e.g.Have they arrived yet?

17、already“已经已经”常用于肯定句中，常用于肯定句中，yet“还，还，仍然，已经仍然，已经”，常用于否定句和疑问句中。，常用于否定句和疑问句中。1.Review the summary on present perfect tense.2.Finish the exercises on the workbook.l9、春去春又回，新桃换旧符。在那桃花盛开的地方，在这醉人芬芳的季节，愿你生活像春天一样阳光，心情像桃花一样美丽，日子像桃子一样甜蜜。2023/1/162023/1/16Monday,January 16,2023l10、人的志向通常和他们的能力成正比例。2023/1/162023

18、/1/162023/1/161/16/2023 7:05:04 PMl11、夫学须志也，才须学也，非学无以广才，非志无以成学。2023/1/162023/1/162023/1/16Jan-2316-Jan-23l12、越是无能的人，越喜欢挑剔别人的错儿。2023/1/162023/1/162023/1/16Monday,January 16,2023l13、志不立，天下无可成之事。2023/1/162023/1/162023/1/162023/1/161/16/202314、Thank you very much for taking me with you on that splendid

19、outing to London.It was the first time that I had seen the Tower or any of the other famous sights.If Id gone alone,I couldnt have seen nearly as much,because I wouldnt have known my way about.。16 一月 20232023/1/162023/1/162023/1/16l15、会当凌绝顶，一览众山小。一月 232023/1/162023/1/162023/1/161/16/2023l16、如果一个人不知道他要驶向哪头，那么任何风都不是顺风。2023/1/162023/1/1616 January 2023l17、一个人如果不到最高峰，他就没有片刻的安宁，他也就不会感到生命的恬静和光荣。2023/1/162023/1/162023/1/162023/1/16谢谢观看THE END