Unit 9Grammar Focus— Have you ever been to a science museum? — Yes, I’ve been to a science museum. / No, I’ve never been to a science museum.— Have you ever visited the space museum?— Yes, I have. I went there last year. / No, I haven’t.— I’ve been to the art museum many times.— Me, too. And I’ve also visited the nature museum.— I’ve never been to a water park.— Me neither.现在完成时： 表示过去发生或已经完成的某一动作对现在造成的影响或结果，或从过去开始一直延续到现在的动作或保存的状态。结构： 主语+ have / has + 过去分词以already, yet, just, ever, never, recently, so far等为标 He has already got her help. 他已得到她的帮助。 He has just seen the film. 他看过这场电影。 He hasn’t come back yet. 他还没有回来。 This is the best film I have ever seen. 这是我曾经看过的最好的一部电影。 He has never been to Beijing. 他从没有到过。ever 用现在完成时的一般疑问句，放在主语的后面，过去分词的前面。never 表示否定在助动词have / has 之后，过去分词之前。表示否定的简短回答可使用neither。现在完成时态可用过去发生的动作对现在造成的影响或结果，和 ever, never 等标词连用。 下面我们一起看看这两个词的用法:有此类副词时，强调动作完成，不强调动作的持续—Have you ever been to the Great Wall? ??? 你曾经去过长城吗？ —No, I have never been to the Great Wall.??? 不, 我从未去过长城。 区分 have been to / have gone to 现在完成时态中:have been to 和 have gon |
