2017-2018学年牛津译林版八年级英语下册课件：Unit1 GrammarII (共23张PPT)

Grammar II Free talk: Have you finished your homework yet? 2. Have you been to the Great Wall? 3. Who has been to Beijing? 4. Have you ever travelled by air? 5. Have you seen the film Roman Holiday? 现在完成时的时间副词和时间短语: 1. 副词already和yet。already一般用于肯定句中，yet一般用于否定句和 疑问句中。 如: We have already finished our homework. 我们已完成作业了。 They haven't finished their homework yet. 他们还没有完成作业。 - I have never been to the Great Wall. 我从未去过长城。 副词ever 和never。多用于否定或疑问 句中，表示“曾经”或“从未“等。  如: - Have you ever been to the Great Wall? 你曾经去过长城吗? He has been there twice the last few days. 近几年他去过那里两次了。 3. 用表示到说话时为止的时间状语, 如 : just, before, up to now, the past few years等。 如: I have seen her before, but I can not remember where.   我以前见过她，但记不起在哪里见过。 如: I haven't seen him for two years. 我两年没有见过他了。 4. 表示动作或状态从某一时刻开始， 一直持续到现在的时间状语: so far, for+ 一段时间, since +过去时间或一般过去时的句子。 Mrs Li has taught in our school sinc