山东省文登市七里汤中学八年级英语上册《unit 6 how long have you been collecting shells》教案 鲁教版.doc

?《 Unit 6 How long have you been collecting shells 》教案? Teaching aims ? 1. 学****本节课单词、重点词组? 2. 理解并运用现在完成时? Teaching methods: 小组合作、归纳法? Teaching steps: ?一、识记下列单词: ?收集——贝壳——一双——自从——筹集——几个的——邮票——风筝——任何人——?二、任务一:自学内容?现在完成时:? have/ has + 过去分词? 1) 表示动作发生在过去, 到现在为止已经完成, 强调的不是这个动作而是动作对现在所造成的影响和结果。? Now we have planted all the trees. ? He has e back. ? Have you had your supper? ?I have read the book twice already. ?在这种用法中常跟 already, not … yet, never, just, before, ever, recently 等时间继续下去的状语。 2) 表示从过去开始, 持续到现在, 常与一段时间的状语连用。? He has studied English for 6 years. ? Mary has been busy since she came back from Hangzhou.. ?注意:翻译现在完成时的句子时需要翻译成“已经…”过去分词的构成 1. 直接加-ed 。如: play-played 2. 以字母 e 结尾的直接加 d 。如: name-named 3. 以辅音字母加 y 结尾的,变 y为i加 ed 。如: carry-carried 4. 重读闭音节且末尾只有一个辅音字母,双写这个辅音字母再加-ed 。如: stop- stopped 现在完成时 Present perfect 句型肯定句现在完成时的肯定句式是“ have ( has )+过去分词”。注意: 该句式中的 have 或 has 是助动词, has 用于第三人称单数, 其它人称一律用 have 。 2. 疑问句现在完成时的一般疑问句式是把助动词 have 或 has 提到主语之前。(回答用“ Yes ,... hav e( has ) ./ “ No,... haven ’t( hasn ’t).”) 3. 否定句:现在完成时的否定句式是“ haven't ( hasn't )+过去分词”。肯定句 I have eaten my lunch. She has eaten her lunch He has eaten his lunch. They have eaten their lunch. 否定句 I have not (haven ’ t) seen the film. She has not (hasn ’ t) seen the film. 现在完成时的否定形式: have not (haven ’ t)+ 过去分词 has not (hasn ’ t)+ 过去分词 I have n’t eaten supper. eat-eaten He hasn ’t changed his idea. change-changed My mother h