人教新目标（Go for it)版英语八年级下册 Unit 8 Have you read Treasure Island yet？现在完成时(1)（课件）

这是一份人教新目标（Go for it)版英语八年级下册 Unit 8 Have you read Treasure Island yet？现在完成时(1)（课件），共37页。
专项讲解Unit14 Have you packed yet ?现在完成时 The Present Perfect TenseStudying aims1.现在完成时的构成 2.现在完成时的主要用法 及相关的时间状语 3. 短暂性动词与时间段的关系 4. have been 与have gone 比较 5.与一般过去时的用法比较夏天还会远吗 ?will it still be far in summer?春天已经来了,Spring has already come, 现在完成时态Springhas already come.一)构成:have/has+动词过去分词The present perfect tense助动词 （可以帮助构成肯定、疑问和否定句）1.He has cleaned his room. (写一个一般疑问句）Has he cleaned his room?2. She has lived in London for four years. (划线部分提问）How long has she lived in London?3. He has been to China, ____ ____? （写出反义疑问句部分）hasn’t he 4. They have come back from work. (写否定句）They haven’t come back from work.(一)表示过去发生的动作或事情对现在的影响和产生的结果.它强调的是过去的动作同现在的联系.常用的时间状语有already, yet, ever, never, just, before等.现在完成时的主要用法A: ______ your brother ______ his homework yet? (finish)B: Yes, he ‘s already done it.Key wordsHas finished yet already 注意：already 用于肯定句， yet 用于疑问句和否定句中A: _______ you ever _______ to the park? ( be )B: No, never. Key wordsHave been yet already ever never 注意： ever 曾经 用于疑问句中 never 从不 带有否定意义I ______ just ________ the desk, you can take it to your classroom . (mend )Key wordshave mended yet ever never just already Just 刚刚 与现在完成时连用 一般置句中Just now 刚才 与一般过去时连用 (二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.Tom ___________ in the factory since he left school ten years ago. (work )Key wordshas worked since since 后面带过去时间或有一般过去时的句子A: How long ______ you ________ in this school? (teach )B: For 6 years. Key wordshave taught since for + 一段时间We _______ only ____________ 100 trees so far. (plant) Key words have planted so far 到目前为止Key words yet ever never since for just before already so far in the past 10 years twice 也可以是其他表示次数的词how longSome verbs can't often be used with "for" or "since"Please point out any mistakes and correctShe has bought the computer for two years.hadPlease point out any mistakes and correctHow long have you come to the United States？ been in Please point out any mistakes and correctAnn has gone to China since three months ago.been inPlease point out any mistakes and correctI have left Shanghai for 3 days. been away for 3 days. Please point out any mistakes and correctI have borrowed the dictionary since 3 days ago . kept Please point out any mistakes and correctThe film has begun for 10 minutes. been on Please point out any mistakes and correctThe concert has finished for half an hour. been over Please point out any mistakes and correctHis dog has died for two years . been dead can you distinguish?去过某地已经回来常与ever, never,once,twice,连用 一直留在某地与for / since连用用how long 提问去了某地还没回来只用于第三人称 Her sister _____________ Australia,She left this morning.has gone to can you distinguish?去过常与ever, never,once,twice,连用 在…与时间段连用用how long 提问去了说话时某人不在只用于第三人称 A: How long ____ you _______ China? B: I _________ here for 3 years. have been have been in can you distinguish?去过常与ever, never,once,twice,连用 在…与时间段连用用how long 提问去了说话时某人不在只用于第三人称 A: _____ you ever ________ the city ? B: No , never .Have been to 与一般过去时的用法比较 现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身,而是强调事情与现在保持的某种密切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只讲述发生在过去的动作和事情与现在没有关系。 上一页下一页主菜单The past tense or the present perfect tense know have known knew The past tense or the present perfect tense saw have lost The past tense or the present perfect tense did has finished see saw 用动词的适当形式填空1.--______ you _________your pen? (mend) --Yes, I _______. --When_______ you _______ it? --I __________ it yesterday.2.--How do you like the film? --I ____________(not see) such a moving film before. 3.Millie’s sister _______(join) the club last week. So she _________(be) in the club for nearly one week. Have mended have did mend mended haven’t seen joined has beenExercises4.My father__________(give) up ________(smoke). He doesn’t _________(smoke) now.5.The Green family_____________(not come) back yet from the cinema. They______(go) to see a film one hour ago. has given smoking smoke haven’t come went 6.She has known Sam______ nine years. (for , never , since)7.They have______arrived. (ever , just , yet)8.Have you_____ ridden a horse? (ever , for , yet)9.She has known Fred______ they were at primary school. (already , just , since)10.We have not completed the project_____. (already , for , yet) for just ever since yet Write a passage about travel to use the present perfect tense.Homework