八年级英语下课件：优选课件：Have you ever been to a museum（Section A Grammar Focus-4c）.pptx

人教版 英语 八年级下册 Unit 9 Have you ever been to a museum?(Section A Grammar Focus-4c) Complete the sentences. Revision 我去过北京两次。 I _____ ______ _____ Beijing twice.2. 旅客已经上船了吗？ ________ the passengers ______ on board yet?3. 这个故事如何结束？ How did the story _______ ______?have been togoneHave end up4. 昨天他没有去那儿，我也没去。 He didn’t go there yesterday. ______ ________. 5. 你听说过太空站吗？ Have you ever ______ __________ the space station? Me neitherheard of/about读一读下面的句子，你发现了什么？Grammar FocusHave you ever been to a science museum?Yes, Ive been to a science museum. / No, Ive never been to a science museum.Have you ever visited the space museum?Yes, I have. I went there last year. / No, I havent.Ive been to the art museum many times.Me, too. And Ive also visited the nature museum.Ive never been to awater park.Me neither.Present Perfect Tense现在完成时的构成have(助动词) + p.phas(第三人称单数助动词) + p.p 肯定式否定式I/You/We/They have finished the work.He/She/It has finished the work.I/You/We/They have not finished the work.He/She/It has not finished the work.疑问式回答Have I/you finished the work?Has he/she finished the work?Yes, you/I have.No, you/I haven’t.Yes, he/she has.No, he/she hasn’t.have not 常缩略为 haven’t。has not 常缩略为 hasn’t。现在完成时的用法Have you had your lunch yet?Yes, I have. I have just had it. (现在我不饿了)表示过去发生或已经完成的动作对现在造成的影响或结果。I have already taught him some English.John has never been to the space museum.My boy has just started junior high school.现在完成时常与时间副词already, never, ever, just, before, yet等连用。同时考虑过去和现在,强调过去的动作对现在造成了影响或产生了结果现在完成时不考虑现在,只陈述一件过去的事情,不强调对现在产生的影响和结果构成上的区别含义上的区别一般过去时现在完成时助动词have/has+动词过去分词动词过去式一般过去时现在完成时和一般过去时的区别与表示一段时间的状语连用,如these days，since +过去某个时间点, for+一段时间 等等现在完成时与表示过去的时间状语连用，如yesterday, last week, then, three years ago, in 1980等时间状语上的区别一般过去时Put the correct forms of the verbs in the blanks.4ato come1. A: Do you want _______ (come) to the space museum? B: No, I’ve already _______ (be) there three times.2. A: Have you _______ (see) the robots at the science museum? B: Y