江西省金溪县第二中学八年级英语下册 Unit 6 How long have you been collecting shells Section A(1a2c)导学案 人教新目标版.doc

unit 6 how long have you been collecting shells section a(1a-2c) 【重难点预测】1.现在完成时态的构成及用法。2.have /has been and have/has gone 的区别。【新知导学】1.when did you start learning english? i started learning english two years ago.2.how long did you sleep last night? i slept 8 hours last night.【自主预习】1.请同学们先认真阅读学习目标，然后仔细研读课本p44-p45, 看完后将所学到的东西进行归纳，画出重要知识点，用红色笔作好疑难标记。2.试着读一读单词表中本课时的新单词（或词组），将不会的单词圈出来，然后通过听磁带或求助于其他等方式将单词读准、读熟。3.你知道下列单词的意思吗？试试看！collect _ shell _ marathon _ pair _skate_ since_been_ 4.写出下列短语的意思。since i was 7 years old _ for five years_a pair of skates_ your first skating marathon_5.课前听一听，完成课本p44-45 1b,2a,2b的听力。【合作探究】任务1：模仿对话，区分现在完成进行时与一般过去时。成龙（jackie chan） 1954:be born 1961now: acta：when did jackie chan begin to act?b: when he was 7 years old.a: how long has jackie chan been acting?b1: he has been acting since 1961.b2: he has been acting for 51 years.b3: he has been acting since he was 7 years old.任务2：新知讲解。归纳生成，你能归纳上面b1- b3主要表达哪种时态吗？这种时态的结构怎样？在什么情况下使用？和一般过去时有什么区分吗？和小组成员讨论一下，然后派代表在班内汇报。(可以查阅资料)_ 任务3：做一个调查。听力之后，小组合作完成一个调查。调查组员最喜欢哪种运动？从什么时候开始？得了多久？然后把调查结果向全班汇报。可用下列句型：when did you start to learn? how long have you been doing .? i started to learnwhen i was i have been doing .for/since_考点聚焦 现在完成进行时：表示从过去某一时间开始一直持续到现在的动作。这一动作可能刚刚开始，也可能仍在继续，并可能持续到将来。由“have/has been + doing”构成。练一练：翻译1.他滑了两小时冰啦。_2.孩子们从八点钟开始就一直在看电视。_3.我学英语学了五年。_ for和since的区分：for+时间段，since+过去的时间点，since +时间段+ago，since +从句 它们都用于完成时中。练一练：用for或since填空1.they have been learning chinese _they came to china.2.i havent seen her _ a long time.3.he has been living here _ 2001.4.she has been doing her homework _ two hours.5. its 5 years _ we left school.6. how long has mary been a teacher? _ two years ago. 【学案整理】_unit 6 how long have you been collecting shells?section a (1a2c) 练一练：1. he has been skating for two hours.2. children have been watching tv since 8 oclock .3.