八年级英语下册 外研版 Module 2 Experiences(Unit 3).ppt

外研版·八年级英语下册 Module2 Experiences Unit 3 Language in use. To summarise and consolidate the use of the present perfect To be able to carry out a survey using the present perfect. Teaching aims 现在完成时（一） Present perfect tense 构成 用法 常用状语 have + 动词过去分词 has +动词过去分词 1.表示曾经做过某事 或已经做过某事 2. 表示某人的经历 ever, already, yet,never 现在完成时 现在完成时的结构： has/have +动词过去分词 肯定句 I have worked. He/She has worked. They have worked. 否定句 I have not worked. He/She has not worked. They have not worked. 现在完成时态的句子转换 （1）肯定式：They have just finished their homework. 否定式：They haven’t finished their homework yet. 疑问式：Have they finished their homework yet? 简略答语：Yes, they have. / No, they haven’t. （2）肯定式：She has seen the movie already. 否定式：She hasn’t seen the movie yet. 疑问式：Has she seen the movie yet? 简略答语： Yes, she has. / No, she hasn’t. 现在完成时中除第三人称单数形式用“has/has not (hasn‘t) +动词的过去分词”以外， 其他人称都用“have/have not (haven’t) +动词的过去分词”形式。 大部分动词过去分词 的变化方式是规则的，但是 有一部分动词的变化是不规则的，同学们需要记住 它们的不规 则变化形式。例如： be — was / were — been find — found — found do — did - done have — had — had eat — ate — eaten make — made — made go — went — gone let — let — let see — saw— seen put — put — put 过去分词的构成: 规则动词?①动词后加-ed, 如： work - worked, cook - cooked。 ②以e结尾的动词加-d, 如： live - lived, like - liked。 ③以“辅音字母+y”结尾的动词将y改为i再加-ed, 如： try - tried, carry - carried。 ④末尾只有一个辅音字母的重读闭音节词,先双写这个辅音字母,再加-ed,如： stop - stopped, drop - dropped。 1．They have been to Mars. 否定句：_____________________________________ 一般疑问句：__________________________________ 肯定回答：____________________________________ 否定回答：____________________________________ 特殊疑问句的否定式(Why)：_____________________________________ 句型转换。 They haven’t been to Mars. Have they been to Mars? Yes, they have. No, they haven’t. Why haven’t they been to Mars? 2．I’ve seen a great TV progr